Introduction
When the chromium content reaches 12%, Cr₇C₃ hard carbides with a microhardness of HV1300~1800 are formed, which is significantly higher than that of Fe₃C in ordinary white cast iron (HV800~1100), resulting in excellent wear resistance.
The carbides exhibit a fragmented network or chrysanthemum-like structure, providing better toughness; through different heat treatments, the matrix can be adjusted from fully austenitic to fully martensitic, adapting to various working conditions.