Bimetallic composite wear-resistant steel plates have been widely used in the field of heavy industry, greatly improving the service life of equipment and workpieces, and making important contributions to enterprises in improving production efficiency and reducing production costs. Bimetallic composite wear-resistant steel plates adopt open arc self-protection fully automatic surfacing process, and a high-alloy wear-resistant layer with high hardness is surfacing on the surface of ordinary steel plates or stainless steel plates. The wear-resistant steel plate has bimetallic properties, i.e. high wear resistance of the working layer and high toughness of the matrix layer, which provides excellent wear-resistance and weldability solution for industrial applications like coiling, welding, plasma cutting, mechanical connection and other processing.
Excellent wear resistance
The chemical composition of the alloy wear-resistant layer contains 4-5% carbon and 25-30% chromium. The volume fraction of Cr7C3 carbide in its metallographic structure reaches more than 50%. The macroscopic hardness is 56-62 HRC, and the hardness of chromium carbide is 1400-1800 HV. Since the carbides are distributed perpendicular to the wear direction, the wear resistance is more than doubled even compared with the casting alloys with the same composition and hardness. The wear resistance comparison with several typical materials is as follows:
- Compared with low carbon steel, 20-25:1
- Compared with high chromium cast iron, 1.5-2.5:1
Good impact resistance
The substrate of the wear-resistant composite steel plate is tough materials such as low carbon steel, low alloy or stainless steel. The wear-resistant layer resists the wear, and the substrate bears the load of the plate, so it has good impact resistance. It can withstand the impact and wear of high drop hoppers in material conveying systems.
Good heat resistance
The alloy wear-resistant layer is recommended to be used under conditions of up to 600°C.
If vanadium, molybdenum and other alloys are added to the alloy wear-resistant layer, it can withstand high temperature up to 800°C.
The recommended operating temperature is as follows:
- Ordinary carbon steel substrates are recommended to be used not higher than 380°C;
- Low alloy heat-resistant steel plate (15CrMo, 12Cr1MOV, etc.) substrates are recommended to be used not higher than 540°C;
- Heat-resistant stainless steel substrates are recommended to be used not higher than 800°C.
Good corrosion resistance
The alloy layer of the wear-resistant composite steel plate contains a high percentage of chromium, so it has certain anti-rust and corrosion resistance. It can be used in applications such as coal drop tubes and funnels to prevent coal sticking.
Great variety of products
The wear-resistant steel plate has many varieties, and has become a series of commodities. The thickness of the wear-resistant alloy layer is 3 to 20mm. The composite steel plate starts from 6mm to any thickness required. When ordering high-temperature wear-resistant and impact-resistant composite steel plates, the working conditions must be stated.
Good processability
Wear-resistant steel plates can be cut, bent, curled, welded or punched. It can be processed into various parts that ordinary steel plates can do. Cut wear-resistant steel plates can be welded into various engineering structures or parts.