| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to adopt air hardening which causes only a small amount of deformation by specifying steel of which the hardness of a surface layer part can be made to≥HRC60 by air hardening. SOLUTION: The race of a rolling bearing is formed of alloy steel having a composition which contains, by mass, 0.60 to 1.20% carbon, 0.70 to 2.00% silicon, 0.80 to 2.00% manganese, 0.80 to 1.50% chromium and 0.10 to 1.00% molybdenum and in which the value of D<SB>I</SB>calculated by an equation (1), D<SB>I</SB>=(0.2[C]+0.14)×(0.64[Si]+1)×(4.1[Mn]+1)×(2.33[Cr]+1)×(3.14[Mo]+1), ranges from 13.0 to 40.0. COPYRIGHT: (C)2005,JPO&NCIPI
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