| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing an eco-friendly rolling device without heat treatment for carburizing and carbonitriding, while improving the life and abrasion resistance of bearings. SOLUTION: A method for manufacturing a rolling part comprises quenching the part made from an alloy steel which includes 0.7-1.1 wt.% C, 0.1-0.5 wt.% Si, 0.2-0.8 wt.% Mn, 0.9-2.0 wt.% Cr, and the balance Fe with unavoidable impurities, then subjecting it to a chilling treatment of holding at a cold temperature of -47 deg.C or lower for one or more hours, and tempering it. The method for manufacturing a rolling bearing includes employing the rolling part, on the surface of which carbides with a mean particle diameter of 0.4μm or less out of all existing carbides have an area rate of 32% or more, and carbides with a mean particle diameter of 1μm or more have an area rate of 2% or less, and in the whole volume of which the amount of the retained austenite has a volume factor of 0-0.2%.
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