Molybdenum Tungsten Alloy
Alloys containing molybdenum and tungsten, which include molybdenum-based molybdenum-tungsten alloys and tungsten-based tungsten-molybdenum alloy series. This kind of alloy can be formed in any proportion and is a complete solid solution alloy at all temperatures.
Niobium Tungsten Alloy
A niobium alloy formed by adding a certain amount of tungsten and other elements based on niobium. Tungsten and niobium form an infinite solid solution. Tungsten is an effective strengthening element of niobium, but as the amount of tungsten increases, the plasticity-brittle transition temperature of the alloy will rise, and the grains will also grow significantly. Therefore, to obtain a high-strength niobium-tungsten alloy, the amount of tungsten added must be appropriately controlled, and at the same time, an appropriate amount of elements such as zirconium and hafnium that can refine grains and lower the plasticity-brittle transition temperature must be added. In 1961, the United States successfully developed the Nb-10W-2.5Zr alloy for the skin of the space shuttle, and later developed into the Nb-10W-1Zr-0.1C alloy. In the early 1970s, China also successfully developed NbWl0Zr2.5 and NbWl0Zr1C0.1 alloys.
Cemented carbide
Cemented carbide is the most common and main form of tungsten alloy. Different from the previous tungsten alloys, it is tungsten, carbon and cobalt, so it is often called tungsten-cobalt alloy. The most widely used tools in the industrial field are basically cemented carbide tools, so cemented carbide, a tungsten alloy, is also called "industrial teeth."