MANUFACTURING METHOD OF SINTER HARDENING POWDER METAL MACHINE PART

摘要

PURPOSE: A method of manufacturing parts using sinter-hardened metal powder is provided to facilitate process management by regulating the amount of copper to 100~200 weight% so as to prevent the production of alloy. CONSTITUTION: A method of manufacturing parts using sinter-hardened metal powder comprises the steps of: compressing metal powder at the pressure of 65~70 tone/cm^2 to form a metal power molded product, sintering the molded product by heating it at 1100~1140°C for 10~30 minutes, cooling the sintered product at the speed of 1~3°C/sec in the nitrogen atmosphere, annealing the sintered product at 180~200°C for 60~90 minutes in the air atmosphere to obtain tempered martensite, and shaping the sinter-hardened product.