Composition and hardness

Wear-resistant composite steel plate refers to the composite of high alloy wear-resistant layer on the ordinary steel plate by surfacing welding method, combining the wear-resistant performance of the wear-resistant layer and the bearing capacity of the substrate. Deformability and weldability. The steel boss said that the hardness of the wear layer is generally between HRC50-60.

Steel wholesale manufacturers said that heat treatment wear-resistant steel refers to the low alloy steel plate in the rolling process, or the low alloy steel plate after heat treatment hardening hardening, sometimes known as tempered steel plate. The hardness is generally HB360-550.

2. Wear resistance and wear resistance

The wear-resistant layer of the wear-resistant composite steel plate is of high alloy composition, and the metallographic structure contains a large number of high hardness alloy carbides. (about HV1600) is embedded on the matrix, and the carbide mainly plays a wear-resistant role. The steel boss said that the actual microhardness of the wear-resistant layer is much higher than the measured macro hardness, and its strengthening method is the same as that of cemented carbide. Although the wear-resistant layer has high hardness, its bearing strength is very low. In addition, the substrate is ordinary steel plate and does not have wear resistance.

Heat treatment wear-resistant steel plate is integral hardening, the overall wear resistance. Martensite is the main structure in the metallographic structure, which greatly improves the overall hardness and strength. Microhardness and macrohardness are basically the same.

Three. Temperature adaptability

The wear-resistant layer of the wear-resistant composite steel plate is a high-alloy component, which has a secondary hardening effect at a certain temperature, generally up to 650. Work below ℃. Steel wholesale manufacturers said that more than 250 heat treatment wear-resistant steel plates in the process of use, the hardness will gradually disappear, thus greatly reducing the wear resistance. In heat-affected areas, thermal cutting and welding processes also reduce hardness.

4. Reprocessing performance

The wear-resistant composite steel plate can only be cut by plasma when it is hot cut, the molding is limited, and the bending performance is much lower than that of the heat-treated wear-resistant steel plate. High alloy surfacing layer can not be machined basically, welding can only be carried out on the substrate.

The heat-treated wear-resistant steel plate can be applied to all cutting and blanking methods, and has good bending and forming properties. Steel wholesalers say that machining and welding can also be achieved reliably if certain processes are followed.

5. Service life

Under the same working conditions, generally speaking, the service life of wear-resistant steel plate is longer than that of wear-resistant composite steel plate.