HIGH MELTING POINT METALLIC MATERIAL HAVING SURFACE HARDENED LAYER AND ITS PRODUCING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a high melting point metallic material in which molybdenum or a molybdenum alloy is provided with a surface hardened layer having wear resistance and to provide its producing method. SOLUTION: In this high melting point metallic material having a surface hardened layer, the surface of a base material metal composed of molybdenum or a molybdenum alloy is provided with a surface hardened layer containing nitrogen and carbon.