The appearance of alloy wear-resistant hammers really solves the problem of rapid hammer wear to a certain extent, but in essence, hammers are still consumables. At present, it is recognized that high-chromium cast iron is used as the material for wear-resistant hammers, and the high-chromium alloy hammers have high hardness. It is a high-quality wear-resistant material and has been widely used in hammer crushers. After heat treatment, the hardness of high chromium cast iron can reach above 58HRC. The matrix is martensite with higher hardness. The structure contains a large amount of high hardness carbide M7C3, which is considered to be an ideal wear-resistant material for the hammer of the crusher. The structure and performance of the wear-resistant hammer head mainly depends on the content of chromium, carbon and manganese. Since the affinity of carbon and chromium is greater than that of iron and carbon, a series of stable ferrochromium compounds are formed.