Machine tool, any stationary power-driven machine that is used to shape or form parts made of metal or other materials. The shaping is accomplished in four general ways: (1) by cutting excess material

An alloying material made by powder metallurgy of hard compounds of refractory metals and bonded metals. The main hard compounds are tungsten carbide, titanium carbide and tantalum carbide; The bonding metals are cobalt, nickel and other metals, and cobalt is commonly used. Cemented carbide has high hardness, up to HRA93 ~ 94 at room temperature, and basically remains unchanged below 500℃; Its high temperature red hardness is good, the use temperature can reach 1000℃; The bending strength is 1000 ~ 4000MPa, and the compressive strength is 6000 MPa. Good rigidity at room temperature, no obvious plastic deformation, wear resistance is about 15 to 20 times that of high-speed steel. In addition, cemented carbide also has the characteristics of corrosion resistance and small linear expansion coefficient. Widely used in manufacturing cutting tools, mining tools, molds and wear-resistant, corrosion-resistant parts. Commonly used carbide tungsten carbide base, titanium carbide base and steel bonded carbide. Tungsten carbide base carbide with cobalt as the bonding metal, there are tungsten cobalt alloy, tungsten titanium cobalt alloy, tungsten tantalum cobalt alloy, general alloy, corrosion resistant alloy and ultra-fine grain alloy. The maximum particle size of tungsten carbide of ultra-fine grain alloy is not more than 1 micron, and the tool made is suitable for low-speed cutting. Titanium carbide base carbide with nickel and molybdenum as bonding metals. Tungsten carbide base and titanium carbide base carbide are mainly used in the production of various cutting tools. Steel-bonded cemented carbide with steel as a bonding metal, with machinability, such as cutting, forging, heat treatment and so on. Mainly used for manufacturing molds and wear-resistant, corrosion-resistant parts.