Zund blade Z31 is made of ultra-fine tungsten steel powder. Tungsten steel (hard alloy) has a series of excellent properties such as high hardness, wear resistance, strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance. Carbide is widely used as materials, such as turning tools, milling cutters, planers, drills, boring tools, etc., The cutting speed of new cemented carbides is now several hundred times that of carbon steel.