Hardfacing Wear Pipe consists of two parts: a low-carbon steel plate and an alloy wear-resistant layer. The wear-resistant layer of the alloy is generally 1/3 to 1/2 of the total thickness. When working, the base body provides comprehensive properties such as strength, toughness and plasticity against external forces, and the wear-resistant layer of the alloy provides wear resistance that meets the requirements of the specified working conditions.
The weld overlay wear layer and the substrate are metallurgically bonded. The high-hardness self-protecting alloy welding wire is uniformly welded on the substrate by special equipment, and the composite layer is layered to two layers or even multiple layers. During the compounding process, uniform transverse cracks occur due to different alloy shrinkage ratios. It is a remarkable feature of wear-resistant steel.
The wear-resistant layer of the alloy is mainly composed of chromium alloy, and other alloy components such as manganese, molybdenum, niobium and nickel are added. The carbides in the metallographic structure are fibrously distributed, 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 carbide has strong stability at high temperature, maintains high hardness, and also has good oxidation resistance, and is completely used normally within 500 °C.
Hardfacing wear pipe has high wear resistance and good impact performance, and can be cut, bent, welded, etc., and can be connected with other structures by welding, plug welding, bolting, etc., during the maintenance site. It has the characteristics of time saving, convenience, etc. hardfacing wear pipe is widely used in metallurgy, coal, cement, electric power, mining, building materials, brick and tile industries, etc. Compared with other materials, it has high cost performance and has been accepted by more and more industries and manufacturers. Favor.
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