INNER RING OF CONSTANT VELOCITY JOINT AND MANUFACTURING METHOD THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide an inner ring of a constant velocity joint, which has extremely adequate machinability in machining after hot working and has superior fatigue characteristics. SOLUTION: This inner ring is formed of a carbon steel with a steel structure comprising ferrite, cementite and graphite, in which the graphite has an average particle diameter of 5μm or smaller, and besides, a C content in precipitated graphite grains with particle diameters of 10μm or smaller is 1 mass% to 50 mass% of the total C content. COPYRIGHT: (C)2006,JPO&NCIPI