High-chromium alloy hardfacing wear-resistant plates are the most common type, with wear-resistant layers mainly composed of Cr15-Cr30 series alloys achieving hardness up to HRC 50-62. These plates offer excellent wear resistance and relatively good corrosion resistance, making them suitable for medium-impact working conditions in mining machinery and cement equipment. The chromium carbides in the alloy effectively resist abrasive wear, while the passive film formed by chromium elements provides additional corrosion protection.
Tungsten carbide hardfacing wear-resistant plates represent the most wear-resistant type, featuring wear-resistant layers composed of WC hard particles bonded with alloy matrix, achieving hardness exceeding HRC 60. These plates are particularly suitable for extreme wear environments such as mineral processing equipment and slurry pumps. However, due to the brittleness of tungsten carbide, they may crack under strong impact conditions and therefore require careful selection.
Martensitic alloy hardfacing wear-resistant plates utilize Cr-Mo-V series alloys for their wear-resistant layers, with hardness ranging between HRC 45-55. The most distinctive feature of these plates is their balanced combination of wear resistance and impact resistance, making them ideal for engineering machinery and metallurgical equipment operating under both wear and impact conditions. The martensitic structure provides good toughness to withstand significant impact loads.
Composite hardfacing wear-resistant plates employ a special multi-layer structure design, typically consisting of alternating hard and soft wear-resistant layers. This structural design simultaneously meets requirements for both impact resistance and wear resistance, making them particularly suitable for extreme working conditions like large crushers. By combining different materials, the comprehensive performance of the wear-resistant plates can be optimized for specific operating conditions.
Additionally, there are wear-resistant layers with special formulations, such as nickel-based alloy plates for high-temperature environments and cobalt-based alloy plates offering better corrosion resistance. Different wear-resistant layer materials can be selected and combined according to specific working condition requirements to achieve optimal performance.
