The 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. When working, the matrix provides comprehensive properties such as strength, toughness and plasticity against 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 alloy wear-resistant layer and the substrate. Through special equipment and automatic welding process, the high-hardness self-shielding alloy welding wire is evenly welded on the substrate, and the number of composite layers is one to two or even multiple layers. During the composite process, uniform transverse cracks appear due to different alloy shrinkage ratios. It is a remarkable feature of wear-resistant steel plate.
The alloy wear-resistant layer is mainly composed of chromium alloy, and other alloy components such as manganese, molybdenum, niobium, and nickel are added at the same time. The carbides in the metallographic structure are distributed in fiber form, and the fiber direction is perpendicular to the surface. The carbide microhardness can reach above HV1700-2000, and the surface hardness can reach HRC58-62. Alloy carbides have strong stability at high temperatures, maintain high hardness, and also have good oxidation resistance, and can be used normally within 500 °C.
The wear-resistant layer can be expressed in the form of narrow road (2.5-3.5mm), wide road (8-12mm), curve (S, W), etc.; it is mainly composed of chromium alloy, and manganese, molybdenum, niobium, nickel and boron are added at the same time. and other alloy components, the carbides in the metallographic structure are distributed in fiber form, 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 plates are mainly divided into three types: general-purpose, impact-resistant and high-temperature resistant; the minimum total thickness of wear-resistant steel plates can reach 5.5 (2.5+3) mm, and the maximum thickness can reach 30 (15+15) mm; wear-resistant steel plates It can roll wear-resistant pipes with a minimum diameter of DN200, and can be processed into wear-resistant elbows, wear-resistant tees, and wear-resistant reducers.
