High chromium white cast iron contains more than 11% chromium, and the ratio of chromium to carbon content is between 4 and 8. Under these conditions, the high-hardness M7C3 carbide almost completely replaced the M3C carbide. The M7C3 type carbide basically exists as an isolated hollow hexagon. Compared with the M3C type carbide which is continuously distributed in a network, the continuity of the matrix is greatly enhanced, and the toughness of the overall material is significantly improved. High chromium cast iron has been recognized as an excellent wear-resistant material in the world, and it is widely used in mining, cement, electric power, road construction machinery, refractory materials, etc.