FERROUS SINTERED ALLOY, PROCESS FOR PRODUCING FERROUS SINTERED ALLOY AND CONNECTING ROD

摘要

A ferrous sintered alloy includes a sintered raw-material powder that is made of an Fe—Cr—Mo-system powder, a carbon-system powder and an Mn—Si-system powder before sintering. The ferrous sintered alloy exhibits a density of 7.4 g/cm³ or more, and has a metallic structure that includes martensite and bainite. In the metallic structure, the martensite accounts for an area proportion of 40% or less when the entirety of the metallic structure is taken as 100% by area. Moreover, the martensite exhibits a particle diameter of 20 μm or less. The ferrous sintered alloy is good in terms of machinability.