When the chromium content is 3% or higher, it has better toughness and wear resistance, and a deeper hardened layer can be obtained, which can meet the requirements of high-speed rolling and high-load rolling. Semi-high-speed steel rolls are a type of roll material that combines the characteristics of high-speed steel and common tool steel. They are mainly used in the steel rolling process, especially widely applied in cold rolling or medium to high-load hot rolling scenarios