Tungsten alloy is a kind of two-phase composite alloy material that were composed with the tungsten substrate and a small amount of Cr, Mo, Ni, Cu, Fe, Co and other elements, i.e., the high melting point of tungsten phase and the low melting point of the γ phase (Ni-Fe, Ni- Cu, etc.), it can be divided into two categories, namely, W-Ni-Cu alloys and W-Ni-Fe alloys, they both have a series of excellent physical and mechanical properties. But the plasticity of W-Ni-Cu alloys would be lower compared to W-Ni-Fe alloys, which makes its application more extensive. The applications of tungsten alloy counterweights can be described as extensive, it can be used in the sophisticated science technology such as aerospace, and the the gyrorotors, screw counterweights, trim tabs etc. of the navigator in military industry. Besides, the tungsten alloy counterweights also can be used as the balance counterweight elements in the machinery manufacturing and pressure casting industry and so on.

 

Tungsten alloy counterweights were mainly mixed, pressed and sintered with tungsten powders, nickel powders and iron powders. Wherein the amount of tungsten is up to 80% to 97%, while the nickel powders and iron powders are mainly acted as bonding agents. Due to the huge different melting points  between the two-phase, so it is a typical liquid-phase sintered alloy, and it is also the main preparation method of tungsten alloy counterweights.