The fine surface treatment process of the high chrome roller sleeve of the impact crusher is the key to ensuring its long-term durability and high efficiency. The high chrome roller sleeve is usually cast with high chrome alloy, and good hardness and wear resistance are obtained by optimizing the alloy composition and heat treatment process. However, simple casting is not enough to meet the high durability requirements under high-intensity crushing conditions, so it is particularly important to finely treat its surface.Usually, the surface of the roller sleeve undergoes fine heat treatment processes such as quenching and tempering to increase the surface hardness and improve its wear resistance. In this process, the surface of the roller sleeve is quickly heated to a high temperature and then quickly cooled, so that a hard martensitic structure is formed on the surface, which greatly improves its wear resistance. In addition, the surface of the roller sleeve may also be sprayed, laser surface treated, or hard alloy coated to further enhance its corrosion resistance and impact resistance. Through these fine treatments, the durability of the roller sleeve is significantly improved, and it can withstand the impact and wear of hard materials such as ore during the crushing process, extending its service life.