MECHANICAL STRUCTURAL COMPONENT, SINTERED GEAR, AND METHODS FOR PRODUCING SAME

摘要

A sintered gear serving as a mechanical structure component is a mechanical structure component made of a metal sintered body, and includes a base region (13); and a high density region (14) formed so as to include a maximum stress position (17) at which a maximum tensile stress or a maximum shear stress is applied, and to include a surface (15), in which the high density region (14) is lower in porosity than the base region (13). A surface hardened layer (16) is formed in a region including the surface (15) by performing a hardening process