Patent ID: 6923576
Filing Date: 2005-08-02
Classification: C21D,C22C,C23C,F16C,Y10S

Abstract:
1. A rolling bearing comprising: an inner ring; an outer ring; a plurality of balls as rolling elements rollably interposed between the inner ring and the outer ring, wherein the radius of curvature of the raceway on the inner ring and the outer ring is from not smaller than 50.1% to not greater than 51.9% of the diameter of the balls, and at least one of the inner ring, the outer ring and the rolling elements is obtained by forming an alloy steel having: a carbon (C) content of from not smaller than 0.50% by weight to not greater than 0.90% by weight; a chromium (Cr) content of from not smaller than 3.0% by weight to not greater than 90% by weight; a manganese (Mn) content of from not smaller than 0.10% by weight to not greater than 2.0% by weight; a silicon (Si) content of from not smaller than 0.10% by weight to not greater than 2.0% by weight; a molybdenum (Mo) content of zero or not greater than 2.0% by weight; and a vanadium (V) content of zero or not greater than 2.0% by weight, into a predetermined shape, and then subjecting the alloy steel to form hardening and tempering.