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How to estimate your Investment Casting Cost?- whatsapp: +8613256761911

用户005 — Tue, 23 Aug 2022 06:24:03 +0000

How to estimate your investment casting cost?

Since different facts directly affect investment casting costs, the best way to estimate investment casting cost is to outline all factors that affect the total cost.

These different facts will have different effects on each case. A better understanding of them is essential for you to consider your castings when making your budget. Therefore, please review the following factors that may affect the investment casting total cost calculator.
Investment casting is the most commonly used method in automobile, gun industry and railway industry. Here, we can see the unique cost of each metal due to various technologies, methods and quality requirements.

Material cost - metal

Considering the casting process, the amount of material used each time is greater than the final size of the product. This means that we must initially bear a considerable investment in casting costs to obtain the final high-quality products.
The design engineer decides the metal selection according to the end use of the casting. In addition, factors such as availability, performance and price also affect the selection of materials. The initial cost of metals plays an important role in the final estimation of total production. According to the world economy and availability, the total investment casting cost of the same alloy or metal will vary. In addition, transportation costs and other taxes will also affect the price of materials. Finally, the cost of lost wax casting.
Some metals are more expensive than others. For example, titanium is more expensive than aluminum. Using the metal alloy calculator, you will quickly and clearly understand the type of metal required for the project.
Working with metal procurement consultants to develop effective plans for future projects will also be effective in the investment casting cost calculator. Regarding the price of metals, these prices are estimated based on the market, demand and supply. Although there are thousands of steel grades, considering the financial value, we can divide the steel into four categories.

Design investment casting cost

The complexity of design also affects the cost of investment casting. Complex structures may require some additional procedures and treatments. This will further increase the price of investment casting products.
The number of shell layers also affects the cost of investment casting. The more complex the design you want in your project, the more layers you will need. And investment casting costs will be more expensive.

Labor cost of investment casting

Any investment casting company shall add labor cost estimation when calculating the total investment casting cost. The average wage of investment casting workers also has a great impact on the cost estimation of lost wax casting.
Can we reduce labor costs? Considering the calculation of the time required in the manufacturing process of investment casting mold, manual pouring of metal is essential. Also, the time required to remove the part from the mold and clean it is important. Therefore, we cannot exclude the labor cost when making the investment casting cost calculator.

Set cost: Metal Investment Casting

When parts are manufactured in small quantities (e.g., prototypes) compared to large orders, the setup cost per part of metal investment casting is higher. With the increase of production, the cost will increase correspondingly, and the investment casting cost per metal will decrease.

Investment casting mold cost

The cost of investment casting mold can be estimated mainly according to the required mold materials. For example, the manufacturing process of the investment casting mold and the material of the cut part.
Therefore, the cost is determined by the material and manufacturing of the investment casting mold. The choice of materials depends on the required tool life, which is different from the number of orders.
After considering all these variables, you will get an accurate estimate of the investment casting mold cost of the project. Making business decisions based on accurate estimates is essential to your bottom line.

Output cost of investment casting products

The percentage of the weight of investment casting products in the actual casting weight is called the casting yield. The lower the casting yield, the higher the investment casting cost.
The relationship between the front segment price and the yield is that the cost per kilogram of the front segment of the casting = the cost per kilogram of the front segment of the casting.
The budget we spend on the front stage of investment casting products per kilogram is inversely proportional to the output. Without products, the effect will be considerable. The unit price per kilogram of molten steel pouring front end is 6 yuan. Through these calculations, we can estimate the investment casting cost per kilogram of investment casting products.
If the yield is 45%, the wax loss casting cost per kilogram of the front stage of investment casting is 13.33 yuan. If there is 30% productivity, the front part of the casting is 20 yuan / kg. At 60% productivity, the front of precision investment casting is 10 yuan / kg. Less than 3.3 yuan than the average level. Deduct 18.5% from the processing amount. For 304 stainless steel precision casting, the total cost is reduced by about 7%.
When the yield is 45%, the cost of precision investment casting will increase by xnumx yuan for every 0.3% reduction in cost per kilogram. When the yield is 30%, the cost of the front stage of the precision investment casting will increase by about xnumx yuan per kilogram for every 0.67 percentage point reduction.
This shows that the yield has a considerable impact on the investment casting cost.

Investment Casting – Everything you need to know- whatsapp: +8613256761911

用户005 — Mon, 22 Aug 2022 05:24:28 +0000

Investment Casting - Everything you need to know

Also known as precision casting, the investment casting process is exactly what the name tells you. It is a technique used in the metallurgical community to facilitate and speed up the process of making the same metal parts and machine parts.
It has an interesting past in the art world, with ancient studies showing how it became the object of choice for making jewelry and ornaments. But today it is a program used on a large scale, involving many factory workers.
In this article, you’ll learn more about this process. You’ll learn how it works and why it’s so economical. So if you’re interested in seeing this technology in your daily life, read on!

What is investment casting?

This is an investment casting process that exceeds all expectations in terms of accuracy. The casting process is usually performed by pouring a liquid material into a mold cavity. The liquid solidifies over time through chemical reactions or cooling. To complete the process, the solidified part, also called the casting, pops out of the mold or breaks.
Using wax, plastic or even wood, make the mold according to the desired pattern. The shell is then made and hardened in a high greenhouse. The liquid metal is then poured in and allowed to cool. This is where the precision of the technique comes in particular.
The wax and material used for the mold is perfect for the pattern, and it can have a lot of curves or sharp edges. It may even have a few dents and scratches. But the casing fills all those points, and they stay in place after the material melts.
As soon as the liquid metal is poured in, it fills every inch of the shell, down to spots and dents. This provides the perfect surface. If the pattern is perfect, the piece will be perfect.

What is the use of investment casting?

It is a precision casting manufacturing technology. This is because it can reproduce patterns of complex shapes with fine details.
Today, this is mainly used by investment casting companies for metal parts and machine parts. Investment casting is used in the firearms, food service, gas and oil, and energy industries.
Investment castings are used in a variety of industries, including firearms, food services, gas and oil, and the energy industry. And it exists in your daily life, such as refrigerators, cars, and other items. Instead of making each item individually in an investment foundry that uses heavy machinery and lots of people, they can make thousands of pieces using permanent castings or even disposable castings.
It can even be used in art and decorations. In fact, it can be used in industry. But small business owners and artisans can use different kinds of materials to make art and jewelry on a smaller scale.

Why is it called investment casting?

Investment casting is a centuries-old casting technique based on lost wax casting. The procedure is known in this way because the mold models used in this casting process are “invested” with liquid materials. In investment casting, investment materials are used to make molds into which liquid metal can be poured.

What's the difference between casting and molding?

Since you know what investment casting is and that it involves molds, you must wonder if there is a difference between the two.
Yes, there is. The fundamental difference between molding and casting is the materials used in the operation. Casting is usually done with metal, but molding is done with plastic. In both cases, the molten material is poured into a mold or die to form the final shape.
This is an aluminum investment casting step in which technology plays an important role. Today, the 3D printing business is becoming more accessible, making the molding process more common.
You can find many small businesses online that make molds using plastic models made by 3D printers. Resin is the most common material they use to make crafts from these moulds. They use these molds to make tripods, earrings and many action figures.
On a larger scale, some investment foundries and industries are starting to see the benefits of using 3D-printed models to make permanent molds. This way, patterns and modeling processes can be cheaper, faster, and require less time and money to achieve similar results. Even the more accurate the 3D printer, the more expensive it will be.

What is the difference between investment casting and sand casting?

Sand casting and investment casting are two processes for producing metallic objects that involve pouring molten metal into a mold. Although these techniques are thousands of years old, they have been developed over time to reduce the amount of metal used and the amount of machining and polishing necessary. However, there is a big difference between the processes used to make the two metal parts.
Their processes may look similar, but the key difference is in the mold. One uses sand and the other uses wax.
Investment casting also requires high upfront production costs to develop wax designs and ceramic shells, and then to make a smooth finished product. Although sand casting is cheaper than investment casting, it requires post-treatment to treat the rough surface of the final product.
Let’s look at both methods to better understand how these differences affect each investment casting coating process.

Which is better: Cast Steel or Carbon Steel- whatsapp: +8613256761911

用户005 — Sun, 21 Aug 2022 01:36:01 +0000

Which is better: cast steel or carbon steel

A variety of materials can be used in investment casting, among which cast steel or carbon steel are two common alloy materials. Carbon content is where the two differ most. When the carbon content exceeds 2.1%, it is carbon steel investment casting and vice versa.

Characteristics of cast steel or carbon steel castings

Characteristics of cast steel or carbon steel castings:

Both have the same chemical composition. They are both ferrous metals made from iron atoms. Pure iron is known to be soft, so we add a certain amount of carbon to it to strengthen it. One of the most frequently used metals worldwide is steel.

Carbon steel is preferred for many mechanical devices and large parts because of its carrying capacity and ductility. Cast steel may not be as ductile or load-carrying as cast carbon steel, but it is more resistant to corrosion. Carbon steel casting equipment and parts often require little maintenance and better durability.

Difference between cast steel or carbon steel castings

Resistance to corrosion

Difference between cast steel or carbon steel castings:Carbon steel has higher corrosion resistance than other metals. However, this does not exclude them from corroding. We also have to protect the product after production, such as painting or adding a protective layer. If the products we produce will be used in more corrosive environments later, we can choose cast carbon steel. Or we can add chromium to prevent oxidation.

The cost

Raw steel is usually more expensive to buy, so cast steel is cheaper than carbon steel. But there are many things to consider. If we manufacture short term products that do not require a lifetime warranty or later maintenance, carbon steel is the best choice. But if the product needs to be guaranteed for 10 or 20 years, or even longer, then we need to consider other costs such as later maintenance and labor costs. At this time, it may be more cost-effective to choose cast steel.

ductility

Carbon steel has relatively good ductility and is suitable for making desirable products. Cast steel is slightly less ductile and fluid and shrinks more during cooling.

Highly flexible

Cast steel is less rigid and therefore more flexible. The best carbon steel castings are more challenging than other materials, which is also related to the carbon content.

Vibration reduction

Damping properties should be considered when choosing casting materials, as a lack of damping capacity can lead to excessive vibration and noise, such as ringing or screaming. Depending on the location of the material used, effective damping can lead to sturdier and more reliable performance.
The graphite structure in cast iron, especially the flake structure in gray cast iron, is especially beneficial to absorb vibration. This makes cast iron ideal for applications such as engine blocks and cylinder casings.

The compressive strength

Compressive strength is called the ability of a material to withstand forces that reduce the size of an object. This is the opposite of the force that pulls the material apart. Compressive strength is useful in mechanical applications where pressure and tightness are important considerations. Cast iron usually has a higher compressive strength than steel.

Wear resistance

Cast steel generally has better wear resistance because of its higher carbon content. The surface will be more lubricated and less prone to wear.

Advantages of carbon steel and cast steel

Carbon steel casting

Carbon steel investment casting is also known for its corrosion resistance, especially when used as a protective measure during routine maintenance. In addition, it has the ability to resist deterioration, thus making the casting durable and extending the shelf life. From mild and standard steels to high carbon steels, the carbon content of cast or carbon steels often determines the hardness of the material.

Cast steel

The real benefit of cast steel is its design freedom, which allows the creation of parts with complex geometry and hollow cross sections.
Cast steel offers flexibility and maximum variability in metallurgical manufacturing. This provides different heat treatment options with a wider range of mechanical properties and properties. We can also choose different chemical compositions and controls to suit the various requirements of other projects.

Metal hardness testing: Methods and Scales- whatsapp: +8613256761911

用户005 — Sat, 20 Aug 2022 00:24:45 +0000

Metal hardness testing: Methods and scales

Metal hardness is a property of a metal that describes the ability of a material to resist local plastic deformation.

It’s easy to assume that all metals are hard, but there are quirky ones like mercury – which is liquid at room temperature and doesn’t even have a rigidity value – and sodium metals, which you can cut with a kitchen knife.

There are several different scales and systems for measuring metal rigidity. In this article, we provide an overview of these measurement systems.

Mohs rigidity

Speaking of hardness, most people are familiar with the Morse scale. The system determines hardness based on surface wear – scraping one material against another. If material A can scratch material B, then material A is harder than B.
This scale is used almost exclusively for minerals and gemstones, but can also be used for metals.
Rigidity of metal (Mohs)
Sodium 0.5
In 1.5
Tin 1.5
Aluminum 2.75
Copper 3.0
Bronze 3.0
Brass 3.0
The iron 4.0
Steel 4.0
Cobalt 5.0
Titanium 6.0
Tungsten 7.5
Tungsten carbide 9.0

Rockwell rigidity

Rockwell rigidity method was used to compare two indentation on the material. One is made with a small load and the other with a large load.
A unique characteristic of Rockwell rigidity is that it is linearly dependent on the tensile strength of the material; Rockwell rigidity is usually used for harder materials.
Metal rigidity (Rockwell rigidity)
Sodium –
Lead to 5
Tin –
Aluminum 20 to 25
Copper 10
Bronze 42
Brass 55
The iron 86
Steel 60
Cobalt 70
Titanium, 80
Tungsten 66
Tungsten carbide 75

Brinell hardness

This Brinellrigidity scale is a widely accepted method of measuring the rigidity of materials. It involves pressing a ball of steel (or a harder material of tungsten carbide) into the specimen with a constant and known force. The softer the material, the deeper the ball penetrates, and vice versa.
The next step is to measure the diameter of the resulting indentation and then perform calculations, usually in megapascals, to determine the Brinell rigidity scale.
Typical Brinell rigidity values for several common materials and metals are as follows:
Rigidity of material (Brinell hardness)
Sodium 0.69
In 5.0
Tin 62
Aluminum 15
Copper 35
bronze
brass
Iron, 200-1180
Steel 120
Cobalt 1265
Titanium, 716-2700
Tungsten. 2000-4000
Diamond 8000

Vickers rigidity

The Vickers hardness scale uses a square pyramidal diamond to imprint the material. Then we measure impressions; The size of the indentation determines how deep it is pressed into the material. A formula is then applied to determine the hardness of the material.
One advantage here is that the width of the square indentation is easier to measure than the circle. This means that you can use the same formula (regardless of indenter size) and the same indenter for all material types, unlike many other methods.
Rigidity of metal (Vickers hardness)
sodium
Lead to
tin
Aluminum. 160-350
Copper 343-369
Bronze 250
brass
The iron 608
Iron and steel
Cobalt 1043
Titanium, 830-3420
Tungsten. 3430-4600
Tungsten carbide 2600

The challenge of measuring metal hardness

Rigidity is not an inherent property of materials.
What does that mean? Unlike the melting point, it varies from sample to sample. This is especially true for metals like iron, which can come in many different forms.
Therefore, different methods will produce different results for the same material. It’s not uncommon to see wide differences in metal hardness values on the Internet; Hardness values for many metals under these different tests are not always published or even available.
We should note that there are conversion tables that can be used to convert between one hardness scale method and another.
Other major hardness tests not specifically listed here include Knoop and Shaw hardness.

Chromium Plating: Advantages, Applications and Processes- whatsapp: +8613256761911

用户005 — Fri, 19 Aug 2022 09:30:34 +0000

Chromium plating: Advantages, Applications and processes

Chromium plating is the process of covering or coating an object with a layer of chromium for aesthetic and/or protective purposes.

Since chromium is a naturally occurring metallic element, chromium plating of objects increases their wear/strength and improves corrosion resistance; It can also change the appearance of an object, giving it a metallic and often highly polished appearance.

Types of chromium plating

There are two main types of chrome plating – hard chrome and decorative chrome.

If you primarily want to extend the life of an object, you will choose hard (or engineered) chrome plating. Decorative chrome plating adds a thin layer of chromium for aesthetic purposes.

Chromium plating of complex parts should be pictographic anode cylindrical parts should be cathodic protection at both ends to avoid the phenomenon of burning and thin coating in the middle of the parts with edges and corners, tip can be shielded by metal wire.

application

Chrome plating, whether hard or decorative, is performed using electroplating techniques.
Electroplating is a process that uses an electric charge to drive dissolved chromium from a solution to an object immersed in the solution.
Before plating, however, you must clean and degrease the workpiece to ensure an even coating. Next, you completely submerge the workpiece into a bath containing dissolved chromic anhydride before applying the charge.
With hard chrome plating, you need to plating the workpiece long enough to form a relatively thick chromium layer. This thickness depends on the product specification and ranges from 0.02 mm to 0.13 mm.
For aesthetic purposes, decorative chrome plating often requires additional steps to obtain the best final finish; You’ll start by plating a thin layer of nickel, copper, or sometimes both to provide a smooth, shiny surface finish.
After this, you will electroplate a thin layer of chromium on top to prevent scratching or tarnishing. The final thickness OF the decorative CHROME coating is much thinner than that of the decorative chrome plating, ranging from 0.005 mm to 0.015 mm.
After chrome plating, you can polish or polish the workpiece to the desired finish.

purpose

Because of its attractive mirror finish, the automotive industry relies heavily on decorative chrome plating in the production of parts. It offers items such as rims, bumpers and exhausts – the visible decorative parts of cars and motorcycles – with highly polished metal surfaces and corrosion resistance.
Other common applications of this type include kitchen appliances, faucets, and tools.
Hard chrome plating is also used in the automotive industry, but for different purposes. Thicker coatings provide items such as shock absorbers and engine cylinders to increase wear resistance and hardness.
Other applications of this coating include gears, piston heads, and some aerospace applications.

Process

1, iron chromium plating process
Wax removal → hot dip oil removal → cathode → anode → electric oil removal → weak acid etching → preplating alkali copper → acid bright copper selection → bright nickel → chromium plating or other
Wax removal → hot dip oil removal → cathode → anode → electric oil removal → weak acid etching → semi-bright nickel → high sulfur nickel → bright nickel → nickel sealing selection → chromium plating
2, zinc alloy chromium plating process
Wax removal → hot dip oil removal → cathode electric oil removal → acid leaching → basic bright copper → copper pyrophosphate selectivity → acid bright copper selectivity → bright nickel → chromium plating
3, stainless steel direct chrome plating process
1) Electrochemical oil removal → hot water washing → cold water washing → acid leaching activation 1ml/LHCL, 10ml/L H2SO4 room temperature for half a minute is suitable for automatic line stainless steel chromium plating should not be copper or nickel plating → water → chromium plating.
2) Cathodic electrochemical deoiling → cleaning → anode activation 10A/dm2→ direct plating Chrome.
3) Chemical deoiling → cleaning → anodic electrochemical deoiling 0.5A/ DM 2 → cleaning → dipping Acid activation 1ml/L HCL, 10ml/L H2SO4 at room temperature 45S→ cleaning → plating

Chromium plating: Advantages, Applications and processes

Chromium plating is the process of covering or coating an object with a layer of chromium for aesthetic and/or protective purposes.

Types of chromium plating

There are two main types of chrome plating – hard chrome and decorative chrome.

If you primarily want to extend the life of an object, you will choose hard (or engineered) chrome plating. Decorative chrome plating adds a thin layer of chromium for aesthetic purposes.

application

Chrome plating, whether hard or decorative, is performed using electroplating techniques.
Electroplating is a process that uses an electric charge to drive dissolved chromium from a solution to an object immersed in the solution.
Before plating, however, you must clean and degrease the workpiece to ensure an even coating. Next, you completely submerge the workpiece into a bath containing dissolved chromic anhydride before applying the charge.
With hard chrome plating, you need to plating the workpiece long enough to form a relatively thick chromium layer. This thickness depends on the product specification and ranges from 0.02 mm to 0.13 mm.
For aesthetic purposes, decorative chrome plating often requires additional steps to obtain the best final finish; You’ll start by plating a thin layer of nickel, copper, or sometimes both to provide a smooth, shiny surface finish.
After this, you will electroplate a thin layer of chromium on top to prevent scratching or tarnishing. The final thickness OF the decorative CHROME coating is much thinner than that of the decorative chrome plating, ranging from 0.005 mm to 0.015 mm.
After chrome plating, you can polish or polish the workpiece to the desired finish.

purpose

Because of its attractive mirror finish, the automotive industry relies heavily on decorative chrome plating in the production of parts. It offers items such as rims, bumpers and exhausts – the visible decorative parts of cars and motorcycles – with highly polished metal surfaces and corrosion resistance.
Other common applications of this type include kitchen appliances, faucets, and tools.
Hard chrome plating is also used in the automotive industry, but for different purposes. Thicker coatings provide items such as shock absorbers and engine cylinders to increase wear resistance and hardness.
Other applications of this coating include gears, piston heads, and some aerospace applications.

Process

1, iron chromium plating process
Wax removal → hot dip oil removal → cathode → anode → electric oil removal → weak acid etching → preplating alkali copper → acid bright copper selection → bright nickel → chromium plating or other
Wax removal → hot dip oil removal → cathode → anode → electric oil removal → weak acid etching → semi-bright nickel → high sulfur nickel → bright nickel → nickel sealing selection → chromium plating
2, zinc alloy chromium plating process
Wax removal → hot dip oil removal → cathode electric oil removal → acid leaching → basic bright copper → copper pyrophosphate selectivity → acid bright copper selectivity → bright nickel → chromium plating
3, stainless steel direct chrome plating process
1) Electrochemical oil removal → hot water washing → cold water washing → acid leaching activation 1ml/LHCL, 10ml/L H2SO4 room temperature for half a minute is suitable for automatic line stainless steel chromium plating should not be copper or nickel plating → water → chromium plating.
2) Cathodic electrochemical deoiling → cleaning → anode activation 10A/dm2→ direct plating Chrome.
3) Chemical deoiling → cleaning → anodic electrochemical deoiling 0.5A/ DM 2 → cleaning → dipping Acid activation 1ml/L HCL, 10ml/L H2SO4 at room temperature 45S→ cleaning → plating

How is Tool Steel Made?- whatsapp: +8613256761911

用户005 — Thu, 18 Aug 2022 08:59:20 +0000

How is tool steel made?

What is tool steel?

Tool steel is a kind of carbon engineering steel. As you can guess from the name, it is usually used to make, modify, or repair hand tools or machine dies. Tool steels are noted for their hardness, wear resistance and resistance to deformation. They can hold the cutting edge at very high temperatures, which is why they are often used to shape other materials by cutting, pressing, embossing, or extruding. Their wear resistance enables them to be used in the production of injection molds.

Tool steel group

Tool steels are divided into six categories. Group selection depends on strength toughness, surface hardness, shock resistance, operating temperature and cost. The six groups are:

Water hardening
Cold work
Impact resistant
High speed
The thermal
Special purpose.

How is tool steel made?

The manufacture of tool steel is carried out under carefully controlled conditions to produce the desired quality. Tool steel has a carbon content between 0.5% and 1.5%. The manufacturing process introduces alloying elements that form carbides, typically tungsten, chromium, vanadium and molybdenum.

The most important manufacturing processes of tool steel are as follows:

A smelting

Tool steel is usually made from about 75% scrap – a mixture of mill scrap and outsourced scrap. It is important to avoid contaminating waste, especially from metals such as nickel, cobalt and copper that cannot be oxidized.

Most tool steel production is done by electric arc furnace (EAF) melting.

There are two stages:

The waste is rapidly melted in a furnace.
The molten iron is transferred to separate ladles or converter containers for refining. This process is called secondary refining, and it enables high efficiency and high volume processing.

The refined metal is then transferred to a casting station and poured into ingots. The resulting ingots are usually annealed (slowly heated and cooled) to prevent cracking.

Electroslag smelting

Electroslag remelting or refining (ESR) is a progressive melting process used to produce ingots with a smooth surface and without pipes (holes) or pores (defects). ESR ingots have improved thermal workability, better processing yield, higher cleanliness, better lateral tensile ductility, and fatigue properties.
ESR is an expensive process, and the cost savings through improved yield are not always sufficient to offset the cost of ESR processing. However, for some specialized tool steel applications, ESR can be worthwhile.
Vacuum arc remelting (VAR) is a process sometimes used in conjunction with ESR. However, its use in tool steels is limited to specialized applications with specific bearing requirements. In the VAR process, heat is supplied by an arc in a high vacuum environment. The obtained steel has fine macrostructure and microstructure and excellent chemical uniformity.

The main failure

The decomposition of tool steel is done by a die – opening hydraulic press or a rotary forging machine. These processes are very versatile and can produce square, rectangular, hollow, or step cross sections with lengths ranging from 6 to 13 m (20 to 43 ft). The final product is of very high quality, with few cracks, lap or seams, and a high degree of straightness can be achieved.

rolling

In modern steel making, up to 26 rolling mills are used continuously. The metal is heated by gas thrusters, walking beam furnaces or high-power induction furnaces. Rapid heating is used to prevent decarbonization (loss of carbon content). The process is automated by computer and measuring equipment is used to monitor the diameter tolerance and surface quality of the metal. With this process, a roll of steel can be produced in less than 12 minutes.

Hot and cold wire drawing

Tensile operations are commonly used with tool steels to produce better tolerances, smaller sizes or special shapes. Due to the high strength and limited ductility of tool steel, cold drawing is limited to a single light pass to prevent breakage. Multiple hot draws were performed at temperatures up to 540 °C (1000 °F) to strengthen the metal.

Continuous casting

Tool steel is sometimes continuously cast for economic reasons. After casting, the billet is annealed and ground, then forged with a hammer or rotary, and can then be rolled. Electroslag rapid remelting (ESRR) is a modern process, and its operating temperature is higher than ESR.

Powder metallurgy

Powder metallurgy (P/M) is used to produce high alloy steel such as high carbon steel, high chromium steel and high speed steel. This technique has become increasingly popular in recent years. The production of high-carbon and high-alloy tool steels using conventional methods is particularly challenging. The relatively slow cooling times of these methods can lead to the formation of undesired coarse-structure eutectic carbides, resulting in uneven heat treatment responses, poor lateral mass, and low toughness.

In P/M, the problem of traditional method is overcome. The use of P/M results in a fine, uniform distribution of carbides, resulting in improved machinability under annealing conditions, faster response to hardening heat treatments, and improved grindability. However, there is a drawback – reduced wear resistance.

Osprey process

Osprey Process is still a very specialised activity restricted to sites in Japan and the UK, however, it has great technical and commercial potential. The molten alloy is poured through the nozzle from the induction furnace and sprayed with high-pressure gas atomization jet to form small droplets. The droplets are collected and used to form billets, hollows and sheets.

The advantages of Osprey process are similar to those of P/M. Tool steels produced from Osprey materials have a uniform distribution of fine carbides. However, the Osprey process is currently less economically competitive than P/M.

What is Inconel?- whatsapp: +8613256761911

用户005 — Wed, 17 Aug 2022 08:27:51 +0000

What is inconel?

Inconel is a good example of a high performance metal specifically formulated for some of the most rigorous applications. Inconel is often less familiar than steel or aluminum because it is generally more expensive and less used. This article will provide some basics about Inconel and provide answers to some common questions about this unique metal.

What is inconel?

Inco is the name given to a group of nickel-based superalloys. The name is a registered trademark of Specialty Metals Corporation, New Hartford, New York. The company acquired its name by acquiring companies that previously developed various Inconel alloys. The first alloys were originally formulated for the harsh high temperature environments of the mid-20th century.
Uniform corrosion of InCONel products can occur in acidic or hot alkaline solutions. Through this mechanism losses can be anticipated and allowed in the design. Inco products corrode at a very slow rate when the metal is in a passive state, generally resisting corrosion better with larger chromium content, but other solutes can be harmful.
The importance of the transformation of the metallurgy of steel products at this stage cannot be overestimated. This conversion allows a wide range of microstructure to be achieved through controlled heat treatment. Essentially related to microstructure, mechanical properties, steel products can therefore be obtained over a very wide range of strength, toughness, etc. Conventional production steel 100 mpa over 1 GPA has a strong competitive strength. Therefore, the primary concern is the knowledge of the relative stability of the BCC and FCC structures of iron steel.
It is used in many different industries. One of the most common applications of inco is in the aerospace industry, namely the high-temperature environment inside jet engines. Fuel nozzles, afterburner rings, and other engine components are usually made of inco. This is because they perform well at the high temperatures found during operation. They also protect against the corrosion risks posed by jet fuels and other liquids. It is also commonly used in rockets and space exploration ships. Alloys commonly used in the aerospace industry include 625 and 718.

The chemical composition of inconel

Because it is a group of superalloys rather than just one superalloy, its chemical composition varies from alloy type to alloy type. However, all the alloys in the inco series are nickel-based alloys. In addition, chromium is usually the second most abundant element in the chemical composition of it. Almost every nickel alloy contains some amount of iron, almost always more than 1%. Other elements found in certain alloys include:

cobalt
molybdenum
niobium
titanium

What are the characteristics of inconel?

What are the characteristics of inco?

What is inconel used for?

It is used in many different industries. One of the most common applications of inconel is in the aerospace industry, namely the high-temperature environment inside jet engines. Fuel nozzles, afterburner rings, and other engine components are usually made of inco. This is because they perform well at the high temperatures found during operation. They also protect against the corrosion risks posed by jet fuels and other liquids. It is also commonly used in rockets and space exploration ships. Alloys commonly used in the aerospace industry include 625 and 718.
Another common use of Inco superalloys is in the nuclear industry. Nuclear reactors require high strength, high corrosion resistance and excellent high-temperature performance, which is why inco is often used. Alloys commonly used in the nuclear industry include Inco 600 and Inco 690.
Other industries that use less include automotive, manufacturing equipment/tools, oil and gas, firearms, etc. Any application that requires high strength and corrosion resistance in high-temperature environments is generally a good candidate for It.
References:
INCONEL Alloy 625 (SpecialMetals.com)
Inconel Alloy 718 (Sept 07) Web.qxD (SpecialMetals.com)
Invention and Definition of Alloy 625 (TMs.org)

What is a Safety Grating?- whatsapp: +8613256761911

用户005 — Tue, 16 Aug 2022 05:36:11 +0000

What is a safety grating?

The safety grating is a high-strength metal grating designed to provide a rugged, non-slip solution for industrial applications requiring additional traction. A safety grating is a sheet or channel cut into a pattern that allows easy discharge of liquid and debris. The pattern typically includes a raised surface for enhanced grip along the entire length of the grating.
The high strength nature of the safety grating means that the grating has a high allowable load limit, while the grating remains highly maneuverable and can be easily cut, customized and installed in situ.
Safety gratings are typically low maintenance and resistant to corrosion (stainless steel, aluminum, and galvanized), making them a popular choice for improving safety while reducing cleanup efforts in industrial Settings.
STD series light and small safety grating is a kind of on-beam product developed and developed by foreign advanced technology. It has passed the European CE certification (EN61000 EN550240), has strong stability and can completely replace the imported area sensor. Such as NA, LC, SAS, PJV series, etc., has been widely used in assembly lines, injection molding machines, hydraulic presses, hot melt machines, laminating machines, and other less dangerous equipment.

What is the purpose of the safety grating?

Gratings are designed to reduce the risk of slips and falls and can be installed anywhere where these accidents are at high risk. It can be used in any indoor or outdoor location and is ideal for areas where there is an increased risk of slips and falls due to water, mud, ice, snow, grease or other cleaners. The nature of the grille design allows for the discharge of fluid, mud or dirt and ensures that the sidewalk is not slippery.

Typical uses for safety gratings include:
Stairs and steps
Scaffolding and work platform
catwalk
Vehicle steps or access trays
A roof passage or walkway
The balcony
Non-slip industrial flooring for wet areas.
The lightweight nature of the grating makes it easy to transport and install anywhere, and the ease of handling grating sections means it can be molded, cut and custom installed easily in the field.

Gratings are manufactured at fixed lengths, allowing one person to complete the installation, and the modular nature of the gratings means maximum adaptation to a variety of environments, regardless of the required length.

How is the safety grating made?

Gratings are usually made of carbon steel, galvanized steel, aluminum, or austenitic stainless steel. In the case of a channel grate, the steel or aluminum is first cold-shaped into the shape of the channel. The contours of these holes are raised and serrated to increase traction. These holes provide the open areas required for high levels of drainage while still maintaining a high workload. Punch holes also help reduce weight and facilitate transportation.
There are many variations and patterns available for safety gratings. Perhaps the most common are struts, which consist of diamond-shaped holes with raised serrated surfaces.
After the steel plate has been cut to size and stamped, it can be hot dipped to galvanize the grille to provide corrosion resistance. In some cases, other coatings were applied to the gratings to further repel the liquid or to add additional traction.

Working principle of safety grating

The luminescent device emits several invisible infrared beams, and the receiver receives the infrared beams from the luminescent device, forming a rectangular detection curtain. The whole grating is detected by beam-by-beam scanning. Any opaque object larger than a certain size (such as a part of the operator’s body, opaque workpiece, etc.) invading the light curtain area, will cause shading. When the safety grating detects the blackout, it will enter the “abnormal” state – interrupt output (such as relay from closed to open state, transistor into cutoff state, etc.) within 20ms of response time.

Aluminium Extrusion Process- whatsapp: +8613256761911

用户005 — Mon, 15 Aug 2022 04:58:59 +0000

Aluminium extrusion process

What is aluminium profile?

Aluminium extrusion is widely used in construction, automobile and aircraft manufacturing, industrial machinery and consumer goods.Extrusion is a process used to make aluminium lengths with fixed cross section profiles. By extrusion, very complex cross sections can be produced with excellent strength and surface finish.The aluminium extrusion process works by forcing a piece of metal, called a blank, through a die opening with a smaller cross-sectional area than the blank itself.

Extrusion process

The aluminium extrusion process itself is much like the old Play-Doh Shape Maker. When you squeeze the Play-DOH through the press, the outgoing flow will take the shape of the selected die. Similarly, the extruded aluminium takes the shape of a die opening. Using powerful hydraulic presses capable of applying up to 15,000 tons of pressure, aluminium can be extruded into any shape you can imagine.

There are two main methods of aluminum extrusion:

direct
indirect

Direct extrusion

Direct extrusion is the most important and widely used method in aluminium extrusion. In direct extrusion, the die head remains stationary and the billet is forced through the die using a moving punch.

Direct extrusion is commonly used to make solid bars, bars, and hollow tubes. The mold design can be modified to produce a variety of solid and hollow sections.

Indirect extrusion

In direct extrusion, it is the blank that moves. In indirect extrusion, the billet remains stationary and the plunger moves the die to apply pressure in the stationary billet. The advantage of keeping the blank at rest is that friction is kept to a minimum.

Design the cross section shape before the extrusion begins. The shape and characteristics of the extruded metal are carefully calculated to maximize function, facilitate assembly, reduce weight, and minimize finishing costs. The unique characteristics of aluminium make it a cost-effective product with superior functionality and excellent finish.

The stage of aluminium extrusion

Cast the mold from the cross section of the desired shape.
The billet is heated in a furnace until it reaches 750 to 925ºF. At this point, the aluminium becomes a soft solid.
Lubrication, called SMUT, is applied to the billet and plunger. Black powder is essential because it ensures that the billet and plunger do not stick together.
The plunger applies pressure to the blank, pushing it through the die. In this process, liquid nitrogen is used to cool the mold. Cooling prevents the formation of undesired oxides and extends the length of the die.
The extruded aluminium comes out of the mold in the same shape as the mold opening. The extruded piece is pulled onto a cooling stage and exposed to air, water, or a mixture of both (depending on the final mechanical requirements of the metal).
Use a stretcher next. This corrects any distortions that may have occurred and straightens the metal. Hardness and strength are increased during stretching.
Possibly 50 m long extrusions are fed into a saw conveyor and cut to the desired profile using a circular saw.
For some aluminium alloys, manual aging is used to achieve optimal strength. Artificial aging is accomplished by precipitation heat treatment in an aging furnace. The aging process ensures that fine particles are uniformly precipitated through aluminium to improve strength, hardness and elasticity.
Finally, the finished profile is finished or manufactured and ready for shipping to the customer.

The benefits of extruding aluminium

Compared with other metals, extruded aluminium has many advantages. Some metals can match some of the desirable properties of aluminium, but no metal can match all of these advantages at once.

The benefits of aluminium profiles are many, including:

Light. Aluminum is about one-third the weight of iron, steel, copper or brass. This makes it easier to handle and cheaper to ship. As a result, aluminum is widely used in automotive design, aerospace and high-rise buildings.
Strong. Aluminum is strong enough for all but the most demanding applications. Aluminum is ideal for cold environments because it becomes stronger as the temperature drops.
Corrosion resistance. Aluminum does not rust. It is protected by a surface oxide film, which can be strengthened by anodizing.
Excellent thermal conductivity. Aluminum conducts heat better than most metals. This makes it ideal for heat exchanger operation. Extrusion can be used to produce the most suitable shape for heat transfer.
Economic benefits. The extrusion process is relatively cheap. Prototypes can even be made at reasonable cost.

Which Metal Conducts Heat Best?- whatsapp: +8613256761911

用户005 — Sun, 14 Aug 2022 04:21:01 +0000

Which metal conducts heat best?

Thermal conductivity metal the ability of a metal conducts heat. This property varies by type of metal and is important to consider in applications where high operating temperatures are common.

In pure metal, the thermal conductivity remains roughly constant with increasing temperature. In alloys, however, the thermal conductivity increases with temperature.

Common metal conducts arranged by thermal conductivity
Rank metal thermal conductivity [BTU/(HR · Ft ·°F)]
1 copper 223
2 aluminium 118
3 brass 64
4 steel 17
5 bronze 15
As you can see, among the more common metals, copper and aluminum have the highest thermal conductivity, while steel and bronze have the lowest. Thermal conductivity is a very important attribute when deciding which metal to use for a particular application. Because copper is an excellent conductor of heat, it is suitable for heat exchangers, radiators and even the bottom of a pan. Because steel is a poor conductor of heat, it is suitable for high temperature environments such as aircraft engines.
Here are some important applications that require metals that conduct heat well:

Heat exchanger of metal conducts

Heat exchangers are a common application in which good thermal conductivity is important. Heat exchangers do their job by transferring heat to heat or cool.

Copper is a popular choice for heat exchangers in industrial facilities, air conditioning, refrigeration, hot water tanks, and floor heating systems. Its high thermal conductivity allows heat to pass through it quickly. Copper has additional characteristics required for heat exchangers, including resistance to corrosion, biological contamination, stress, and thermal expansion.

As a more cost-effective alternative, aluminum can also be used in certain heat exchanger applications.

Heat exchangers are often used in the following situations:

Industrial facilities of metal conducts

Heat exchangers in industrial facilities include fossil and nuclear power plants, chemical plants, desalination plants, and Marine services.

In industrial facilities, copper-nickel alloys are used to make heat exchanger pipes. The alloy has good corrosion resistance and can prevent corrosion in saltwater environment. It also has a good resistance to biological fouling, can avoid the formation of algae and nori. Aluminum-brass alloys have similar properties and can be used as substitutes.

Solar water heating system of metal conducts

Solar water heaters are a cost-effective form of hot water heating in which copper tubes are used to transfer solar thermal energy to the water. Copper is used because of its high thermal conductivity, resistance to air and water corrosion, and mechanical strength.

Gas water heater

An air-water heat exchanger transfers heat from gaseous fuel to the water supply. They are common in residential and commercial boilers. For gas water heaters, copper is the material of choice because of its high thermal conductivity and ease of fabrication.

Forced air heating and cooling

Heat pumps that use air have long been used for residential and commercial heating. They work by air to air heat exchange through the evaporator unit. They can be used in wood stoves, boilers and furnaces. Similarly, copper is commonly used for its high thermal conductivity.

Heat sinks of metal conducts

A radiator is a heat exchanger that transfers heat generated by electronic or mechanical equipment to a moving coolant. The fluid transfers heat away from the device and cools it to the desired temperature. Use metals with high thermal conductivity.
Computers use radiators to cool the central processing unit or graphics processor. Radiators are also used in high-power devices such as power transistors, lasers, and light-emitting diodes (leds).
The radiators are designed to maximize the surface area in contact with the coolant.
Aluminum alloy is the most common radiator material. That’s because aluminum costs less than copper. However, copper is used where higher levels of thermal conductivity are required. Some radiators use a combination of aluminum fins and copper bases.

Metal cookers of metal conducts

Metals with good thermal conductivity are more commonly used for domestic purposes in cookware. When you heat food, you don’t want to wait all day. That’s why copper is used in the bottom of high-quality cookware, because the metal conducts heat quickly and spreads it evenly over its surface.

However, if your budget is limited, you can use aluminum cookware as an alternative. It may take a little longer to heat up your food, but your wallet will thank you!