MEMBER FOR DIE CASTING AND PROCESS FOR MANUFACTURING SAME, SLEEVE FOR DIE CASTING, AND DIE CASTING EQUIPMENT

摘要

the present invention, the molten metal and the casting member used in contact with , the base material comprising the hot tool steel and , in contact with the base material wherein the nitrogen is diffused into the components of the base material and a Vickers hardness of more than the Vickers hardness of the base metal than 50HV high nitrogen diffusion layer and a thickness over 5 comprising a nitrogen compound containing the nitrogen- diffused layer in contact with the iron 40 containing the nitrogen compound layer of less than the thickness of the nitride layer more or less 200 400 , a casting member having an oxide layer in contact with the nitrogen containing compound layer containing an iron oxide and that the molten metal is provided in contact with the . ;