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Hard Alloy Feature

Hangzhou JWG Technology Co.Ltd | Updated: Sep 05, 2017

Cemented carbide is a kind of alloy material made of refractory metal and bonded metal through powder metallurgy.

Cemented carbide with high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and a series of excellent properties, especially its high hardness and wear resistance, even at 500 ℃ temperature basic remains the same, there are still very high hardness at 1000 ℃.

Hard alloy are widely used as a cutting tool material, such as turning, milling, planing tool, drilling, boring cutter, etc., used for cutting cast iron, non-ferrous metal, plastic, chemical fiber, graphite, glass, stone and ordinary steel, can also be used for cutting heat resistant steel, stainless steel, high manganese steel, tool steel and other hard processing material.


Cemented carbide with high hardness, strength, abrasion resistance and corrosion resistance, known as the "teeth" industry, used in the manufacture of cutting tool, cutting tool, cobalt and wear-resistant parts, widely used in the military-industrial complex, aviation, machinery, metallurgy, oil drilling, mining tools, electronic communications, construction and other fields, along with the development of downstream industries, carbide increasing market demand. And the future of new and high technology weapons and equipment manufacturing, cutting-edge science and technology progress and the rapid development of nuclear energy, will improve the stability of high technology content and high quality of hard alloy products demand.


In 1923, Germany le shi into tungsten carbide powder, adding 10% ~ 20% of the cobalt adhesive, invented new tungsten carbide and cobalt alloy, hardness is second only to diamond, it is hard alloy artificial made the first one in the world. When cutting steel made of this alloy, the blade will quickly wear out and even crack. In 1929, schwarzkov in the United States added a certain amount of tungsten carbide and titanium carbide to the original composition, which improved the performance of cutter cutting steel. This is another achievement in the history of cemented carbide.

Carbide can also be used to make the drilling tools and mining tools, drilling tools, measuring gage, wear-resistant parts, metal abrasive, cylinder liner, precision bearings, nozzle, hardware mold (such as wire drawing die, bolt moulds, nut moulds, as well as a variety of fasteners, mold, excellent performance of cemented carbide gradually replaced the previous steel mold).

For nearly two decades, the coated hard alloy has also appeared. Sweden in 1969 the successful development of titanium carbide coating tool, cutting tool matrix is cobalt tungsten titanium carbide or cobalt tungsten carbide, titanium carbide coating on the surface of the thickness of just a few microns, but compared with the same brand of alloy cutting tools, 3 times longer service life, cutting speed increased by 25% ~ 50%. In the 1970s, the fourth-generation coating tools were available to cut materials that were difficult to process.

How is hard alloy sintered?

A hard alloy is a metal material made of this or a variety of refractory metals such as carbide and adhesives.

Hardness testing of hard alloy is mainly used to test HRA hardness. PHR series portable rockwell hardness tester is very suitable for testing hard alloy hardness. The instrument weight precision is the same as the desktop rockwell hardness tester. It is very convenient to use and carry.

Cemented carbide is a kind of metal, through hardness test can reflect carbide materials in different chemical composition, structure and mechanical properties under the condition of the heat treatment process, so the hardness test is widely used in the performance of cemented carbide inspection, supervision the correctness of the heat treatment process and new material research.


It is non-destructive testing, and the test method is simple. The hardness of hard alloy is highly adaptable to the shape and size of the specimen, and the test efficiency is high. In addition, there is a correspondence between hardness of hard alloy material and other physical properties. For example, hard alloy hardness test and tensile test are basically tests for metal resistance to plastic deformation. Both of these tests are to some extent the characteristics of metal similarity. Therefore, the test results are completely comparable to each other. The hard alloy tensile test equipment is large and complex, the test sample is prepared, the test efficiency is low, and for many metal materials, there is a test of the scale of hardness test and tensile test. Therefore, in testing the mechanical properties of cemented carbide materials, people are increasingly using hardness tests, and less tensile tests are used.

Hangzhou JWG Technology Co.Ltd