Cr12 cold work die steel refining rare earth addition method

The invention relates to a Cr12 cold work die steel refining rare earth addition method and belongs to the technical field of die steel metallurgy. The Cr12 cold work die steel refining rare earth addition method is provided for solving the technical problems that there is no appropriate Cr12 cold work die steel refining rare earth addition method capable of increasing the rare earth yield and meeting the requirement for inclusions at present. According to the technical scheme, the method comprises the steps of EF electric furnace smelting, LF refining, VD vacuum refining and smelting of Cr12cold work die steel, deoxidization after completion of LF refining, addition of rare earth after alloying, immediate addition of rare earth after VD vacuum refining and vacuum breaking, steel tapping,and die casting and pouring. Through the Cr12 cold work die steel refining rare earth addition method, the rare earth yield is greater than or equal to 50%, inclusions are checked and graded according to the method A of GB/T1