The difference between wear-resistant steel plate and wear-resistant composite steel plate

　　Composition and hardness: Wear-resistant composite steel plate refers to the combination of high-alloy wear-resistant layer on the substrate of ordinary steel plate by surfacing welding, combining the wear resistance of the wear-resistant layer with the bearing capacity, deformation capacity and weldability of the substrate . The hardness of the wear-resistant layer is generally between HRC52-**. Heat-treated steel plate refers to a low-alloy steel plate that is quenched and hardened during rolling, or a steel plate that is quenched and hardened after heat treatment of a low-alloy steel plate, sometimes called a quenched and tempered steel plate. The general hardness is HB360-600.

　　Wear-resistant mechanism and wear-resistant performance: The wear-resistant layer of the wear-resistant composite steel plate is composed of high alloy, and a large number of high-hardness alloy carbides (about HV1600) are embedded in the matrix in the metallographic structure. Carbide plays an important role in wear resistance. The actual microhardness of the wear-resistant layer is much higher than the measured macrohardness, and its strengthening method is the same as that of cemented carbide. Although the wear-resistant layer has high hardness, its bearing strength is very low. In addition, the bottom plate is an ordinary steel plate, which does not have wear resistance. The heat-treated steel plate is quenched and hardened as a whole, and has wear resistance. The metallographic structure is mainly martensite, the overall hardness and strength are greatly improved, and the microhardness and macrohardness are basically the same.