NM450 wear-resistant steel plate is composed of low carbon steel plate and alloy wear-resistant layer. The alloy wear-resistant layer is generally 1/3~1/2 of the total thickness. During operation, the matrix provides comprehensive properties such as strength, toughness and plasticity to resist external forces, and the alloy wear-resistant layer provides wear-resistant properties that meet the requirements of specified working conditions. There is a metallurgical bond between the wear-resistant steel plate alloy wear-resistant layer and the base plate. Through special equipment and an automatic welding process, the high-hardness self-protecting alloy wire is evenly welded to the substrate. The number of composite layers is one to two or even multiple layers. During the composite process, due to the different shrinkage ratios of the alloys, uniform transverse cracks appear. This It is a distinctive feature of wear-resistant steel plates.