High chromium cast iron usually contains chromium content ranging from 15 to 28%. The advantages of high chromium cast iron include high hardness, heat resistance and corrosion resistance. It has high hardness and appropriate heat resistance and corrosion resistance. It is widely used in sandblasting machines ( Blades, distributors and control cages), pulp cutterheads, cement plants (grinding balls and various screen plates), sand pumps and impellers, steel plants (various lining plates and screen plates, coal grinding balls and discs) , impact block, gravity bar and roller) and other parts. The disadvantage of high-chromium cast iron is that it is prone to cracks during processing, and special attention needs to be paid to the cooling and processing processes.