MACHINE PART AND PROCESS FOR PRODUCING SAME

摘要

Provided is a gear (1) (machine part), including a sintered compact obtained by sintering a green compact of raw material powder (10) that contains as a main raw material iron-based alloy powder containing molybdenum and has 0.1 to 0.8 mass% of carbon powder blended therein, the gear (1) (machine part) including a hardened layer (8) formed through heat treatment after the sintering, and having a true density ratio of 97% or more and less than 100%.