PROCESS FOR MANUFACTURING ROLLING MEMBER, PROCESS FOR MANUFACTURING ROLLING BEARING, RACEWAY MEMBER OF ROLLING BEARING AND ROLLING BEARING

摘要

A process for manufacturing a rolling member that while simultaneously avoiding the problem attributed to generation of decarburized layer and the problem attributed to scale generation, attains reduction of manufacturing cost. The process comprises the steel-made member preparation step of preparing a steel-made member consisting of a steel containing 0.7 mass% or more of carbon; the hot forging step of performing hot forging of the steel-made member prepared in the steel-made member preparation step to thereby obtain a blank ring as the first forged member; the first lathe turning step of performing lathe turning of the blank ring obtained in the hot forging step to thereby remove part of the blank ring; and the cold forging step of performing cold forging of the blank ring wrought in the first lathe turning step to thereby obtain a stepped ring. In the steps subsequent to the cold forging step, on the stepped ring, the area wrought in the first lathe turning step is not subjected to cutting operation.