Bimetallic Wear Plates: Characteristics and Application Fields

Introduction of Bimetallic Wear Plates 

Bimetallic Wear Plates are a plate product specially designed for extensive wear conditions. It is formed by welding an alloy wear-resistant layer, with a volume fraction of over 50% Cr7C3 carbide, on ordinary steel plates, heat-resistant steel plates, or stainless steel plates. This design makes Bimetallic Wear Plates perform excellently in wear resistance and find wide applications across various industrial fields.

Characteristics of Bimetallic Wear Plates 

The bimetallic wear composite steel plate uses automated open-arc self-shielded welding technology to weld a high alloy wear-resistant layer with high hardness and high wear resistance on the surface of ordinary steel plate or stainless steel plate. The wear-resistant steel plate has bimetal properties, i.e., high wear resistance of the working layer and high ductility and toughness of the base layer. This design provides convenient connection and welding conditions for industrial applications, allowing for operations such as rolling, welding, plasma cutting, and mechanical connection processing.

The wear-resistant layer has uniform thickness and a flat surface, and the flatness of the entire steel plate is comparable to that of ordinary carbon steel plates. There are stress relief cracks on the surface of the wear-resistant layer; these cracks exist only in the welded wear-resistant layer and do not extend into the base layer. This effectively reduces the residual stress and deformation caused to the base layer during the welding process, thereby avoiding a decrease in the strength of the base layer and not affecting the performance of the Bimetallic Wear Plates.

Composition and Performance of the Wear-Resistant Layer

The primary components of the wear-resistant layer are high-carbon and high-chromium alloys. Depending on different requirements and usage conditions, high-temperature resistant wear plates also contain alloy elements such as molybdenum, tungsten, vanadium, niobium, and titanium. The metallographic structure of the wear-resistant layer is eutectic + M7C3 primary carbide or complex carbide, achieving wear resistance at normal temperature, high temperature, under strong impact, moderate impact, and low-stress impact.

Bimetallic Wear Plates are composed of low-carbon steel plate and an alloy wear-resistant layer. The wear-resistant layer generally accounts for 1/3 - 1/2  of the total thickness. During operation, the base layer provides comprehensive properties such as strength, toughness, and ductility to resist external forces, while the wear-resistant layer provides wear resistance to meet specific work condition requirements. The alloy wear-resistant layer and the base layer are metallurgically bonded. Using specialized equipment, automatic welding processes weld high-hardness self-shielded alloy welding wire uniformly onto the substrate, forming one or multiple composite layers.

Applications of Bimetallic Wear Plates

The composite wear-resistant steel plate can be used for surface reinforcement of various wear-prone equipment parts in metallurgy machinery, building materials machinery, power machinery, mining machinery, and other industries. It is especially suitable for wear and impact of large granular materials, such as metallurgical slag systems, material in and out systems, waste transportation backfill, dry and wet materials in mines, chemical machinery, and coal ash gas transportation.

The wear-resistant steel plate has high wear resistance and good impact performance. It can be cut, bent, welded, etc. It can be connected with other structures by means of welding, plug welding, or bolt connections, offering time-saving and convenience during on-site maintenance. The Bimetallic Wear Plates are widely used in industries such as metallurgy, coal, cement, power, glass, mining, building materials, and bricks. Compared to other materials, it offers a high cost-performance ratio and has gained increasing popularity among various industries and manufacturers.