Tool steel is steel used to manufacture cutting tools, measuring tools, molds and wear-resistant tools. Tool steel has high hardness and can maintain high hardness and red hardness at high temperature, as well as high wear resistance and appropriate toughness. Tool steel is generally divided into carbon tool steel, alloy tool steel and high-speed tool steel. Tool steel can meet the manufacturing needs of various tools and molds, and can improve the service life and performance of tools and molds. In various industrial fields, tool steel is widely used in metal processing, machinery manufacturing, mold manufacturing and other fields.