Tungsten is a non-ferrous metal. Generally, people divide metals into two categories according to their colors and natures: black metals and non-ferrous metals. Black metal mainly refers to iron, manganese, chromium and its gold, such as steel, wrought iron, iron gold, cast iron, etc. Metals other than black metals are called non-ferrous metals. Tungsten belongs to the category of nonferrous metals. The strength and softness of nonferrous metals are generally higher than those of miscellaneous metals, the resistance is larger than that of miscellaneous metals, and the resistance temperature coefficient is smaller, so it has excellent comprehensive opening machine function. As a non-ferrous metal, tungsten is very weak and soft. Because of that feature, tungsten soft gold with soft degree and weak wear resistance is widely used in cutting objects and mining objects.