The wear-resistant steel plate is composed of low-carbon steel plate and alloy wear-resistant layer, which is generally 1/3~1/2 of the total thickness. When working, 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 to meet the requirements of specified working conditions.
The wear-resistant steel plate alloy wear-resistant layer and the substrate are metallurgically bonded. Through special equipment and automatic welding process, the high hardness self-protection alloy welding wire is uniformly welded on the substrate. The number of composite layers is one to two or even more layers. During the composite process, due to the different alloy shrinkage ratio, uniform transverse cracks appear, which is the remarkable feature of wear-resistant steel plate.
The wear-resistant layer of the alloy is mainly made of chromium alloy, and manganese, molybdenum, niobium, nickel and other alloy components are also added. The carbide in the metallographic structure is distributed in the form of fiber, and the fiber direction is perpendicular to the surface. The microhardness of carbide can reach above HV1700-2000, and the surface hardness can reach HRC58-62. The alloy carbides have strong stability at high temperature, maintain high hardness, and have good oxidation resistance. They can be used normally within 500 ¡æ.
The manifestations of the wear-resistant layer include narrow channel (2.5-3.5mm), wide channel (8-12mm), curve (S, W), etc; It is mainly made of chromium alloy, and manganese, molybdenum, niobium, nickel, boron and other alloy components are also added. The carbide in the metallographic structure is distributed in the form of fiber, and the fiber direction is perpendicular to the surface. The carbide content is 40-60%, the microhardness can reach above HV1700, and the surface hardness can reach HRC58-62.
Wear-resistant steel plate is mainly divided into three types: universal type, impact resistant type and high temperature resistant type; The minimum total thickness of wear-resistant steel plate can reach 5.5 (2.5+3) mm, and the maximum thickness can reach 30 (15+15) mm; The wear-resistant steel plate can be rolled into wear-resistant pipes with a minimum diameter of DN200, and can be processed into wear-resistant elbows, wear-resistant tees and wear-resistant reducing pipes.
