Tungsten carbide suggests that it is the product of the reaction of carbon and tungsten. First invented by German scientists. In actual use, due to its high hardness and very brittle, so the need to add a soft metal is used as the binder, the most commonly used is cobalt, nickel also available. High hardness of WC, it is very wear-resistant and therefore a large number for a machine tool, the drilling of oil and mining equipment, the key wear-resistant pieces of equipment, etc.. However, its corrosion resistance is a big problem. The nickel-base alloy by definition are the nickel alloy as the main ingredient. Initially developed for corrosion resistance, mainly nickel alloys and nickel - copper alloy (also called Monel). And later developed a nickel - chromium alloys for aerospace turbine engine. The common market Hastelloy due may Nair the alloy, Incology alloy, stainless steel is more expensive. The nickel base alloy of the corrosion-resistant, high temperature capability is strong, but the casting performance is rather poor. High nickel alloys (nickel containing more than 45%) is blocked Western China or technology, we can see its value in use.