Sunder material is a so-called "Liner" materials. Cover made of Copper Tungsten alloy (material commonly used W-30Cu) cup-shaped or funnel-shaped, flip to the front end of Jane's ammunition, gunpowder temperature and pressure by the cover is deformed into a jet and piercing. This Liner first used copper manufacturing, and a large number of applications. In order to increase the quality of the cover unit to improve armor capability, and later research unit mass is larger than the guillotine Copper Tungsten alloy liner, in the ideal case, it is higher than the capacity of copper armor cover about 30%.
Tungsten copper alloy is an alloy of tungsten and copper. Commonly used copper content of the alloy is 10% to 50%. Preparation of alloy powder metallurgy method has good electrical and thermal conductivity, good high temperature strength and a certain plasticity. At very high temperatures, such as above 3000 ℃, the alloy of copper is liquefied and evaporated to absorb a lot of heat, reducing the surface temperature. So this kind of material is also referred to as metal sweat material.
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