Tungsten carbide (chemical formula: WC) is an inorganic chemical compound (specifically, a carbide) containing equal parts oftungsten and carbon atoms. In its most basic form, tungsten carbide is a fine gray powder, but it can be pressed and formed into shapes for use in industrial machinery, cutting tools, abrasives, armor-piercing rounds, other tools and instruments, and jewelry.
Tungsten carbide is approximately two times stiffer than steel, with a Young’s modulus of approximately 550 GPa, and is much denser than steel or titanium.
This material has a very important role in the industry, professional or domestic use. And all thanks to a whole list of very useful physical and chemical properties. For example, resistance to high temperatures (the melting point of 2780 °C), variable environmental conditions, oxidation. And some plasticity, which often shown under load. At ambient temperature tungsten carbide is not afraid of phosphoric, oxalic acid, sulfuric acid and hydrochloric acid. But the most important quality of this material is its highest hardness and wear resistance.
This is the hardest binary carbide, almost not inferior to diamond. It is considered the hardest metal in the world: it is 5 times harder than steel, 10 times harder than carat gold and 4 times – than titanium.
It is used for the treatment of super hard surfaces of space technology. Often sprayed or weld to create a wear-resistant coating on the surfaces. Used for making cores of piercing bullets and shells. The broad application of tungsten carbide can be seen in the production of heavy-duty balls for ballpoint pens, manufacturing various sharp cutting tools, rods, plates, seals, disk cutters, buttons, blades and even balls.