| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-corrosion-resistant steel material for cold rolling used for bearings, etc., and also to provide a cold forging method using it. SOLUTION: The high-corrosion-resistant steel has a raw material steel composition containing, by mass, 0.35 to 0.65% C, 7.0 to 10.0% Cr, 0.050 to 0.20% N,≤2.0% Si and≤1.5% Mn and satisfying C+N≤0.70%. In the steel, a deformation resistance coefficient k in a deformation resistance formula and a work hardening exponent n are made to 1,000 to 1,060 MPa and 0.12 to 0.18, respectively. By this method, continuous cold forging for bearings is made possible, and various characteristics, such as rolling fatigue characteristics, wear resistance, corrosion resistance and acoustic characteristics, required of bearings can be satisfied. COPYRIGHT: (C)2005,JPO&NCIPI
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