The difference between cemented carbide and tungsten steel

Cemented carbide is not tungsten steel. Although tungsten steel is also a kind of cemented carbide, it is only a kind of cemented carbide.

Cemented carbide is an amorphous alloy material formed by high-temperature sintering of metal powders such as tungsten, cobalt, and titanium, and usually also contains other metal and non-metal elements.

Tungsten steel is hardened by adding ferrotungsten into molten steel as the raw material of tungsten through the steelmaking process, also known as spring steel or composite bonded metal steel.

Cemented carbide has the advantages of high hardness, high wear resistance, high strength and high corrosion resistance, and is widely used in machining, mining, petroleum, chemical and other fields, such as knives, drills, saw blades, abrasives, high-pressure nozzles in chemical plants, etc. Tungsten carbide is the main component of cemented carbide, accounting for about 70%-97% of the total composition. Among them, the bonding metal plays a role in bonding, accounting for only 3%-30%. During sintering, the bond metal wraps and bonds the tungsten carbide, and after cooling, we have cemented carbide. The cutting speed of the tool made of this cemented carbide is 15 times faster than that of the tungsten steel tool, and the performance of the mould made is also excellent, which can punch more than 3 million times, which is 60 times that of ordinary molds.

Tungsten steel is a high-speed steel containing 18% to 25% tungsten. It has the characteristics of high hardness, high toughness, and high heat resistance. It is widely used in the field of cutting processing, such as drills, reamers, slotting tools, etc. Although both belong to hard materials, their composition and application fields are not the same.

 

cemented carbide

 

There are several differences between cemented carbide and tungsten steel:

 

1. Different ingredients

 

Cemented carbide is an amorphous alloy material formed by high-temperature sintering of metal powders such as tungsten, cobalt, titanium, and carbon, while tungsten steel is a high-speed steel with a tungsten content as high as 18% to 25%.

 

2. Different physical properties

 

Cemented carbide has the advantages of high hardness, high strength, and high wear resistance, while tungsten steel has the characteristics of high hardness, high toughness, and high heat resistance.

 

3. Different fields of application

 

Cemented carbide is widely used in machining, mining, petroleum, chemical and other fields, such as cutting tools, drill bits, saw blades, abrasives, nozzles, etc., while tungsten steel is widely used in cutting processing fields, such as drill bits, reamers, slotting knives, etc.

 

4. The preparation process is different

 

Cemented carbide is sintered by metal powder at high temperatures, and the preparation process is relatively complicated, while tungsten steel is prepared by casting or powder metallurgy.

To sum up, although cemented carbide and tungsten steel belong to hard materials, their composition, physical properties, application fields and preparation processes are different.

 

Which is harder, the tungsten steel milling cutter or the carbide milling cutter?

 

In the industrial field, determining the hardness of the tool material is actually an important indicator for selecting a reliable cutting material. Both cemented carbide and tungsten steel have high hardness, but in terms of hardness value, cemented carbide is harder than tungsten steel. The hardness of cemented carbide is generally between 90-94 HRA, while the hardness of tungsten steel is generally between 85-89 HRA. This is because the particle size of hard particles such as tungsten carbide and molybdenum carbide in cemented carbide is relatively small and dispersed evenly, while the hard particles in tungsten steel are large and dispersed unevenly, so the hardness of cemented carbide is higher.

 

Is it better to choose cemented carbide or tungsten steel?

 

Tungsten steel and cemented carbide have their own advantages and disadvantages, and different tool materials can be selected for different applications. Generally speaking, cemented carbide is suitable for cutting hard materials, high-speed cutting and high heat resistance requirements, while tungsten steel has a better cutting effect when cutting materials with less hardness.

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