| 摘要 |
A steel used in a belt-type CVT that is superior in wear resistance and toughness, and a steel for cold punching, that provides the same. The steel satisfies the following: 10.8 [C]+5.6 [Si]+2.7 [Mn]+0.3 [Cr]+7.8 [Mo]+1.4 [V]@13. The steel contains C within the range of 0.50 to 0.70%, Si within the range of 0.03 to 0.60%, Mn within the range of 0.50 to 1.00%, Cr within the range of 0.20 to 1.00%, Ti within the range of 0.01 to 0.10%, and B within the range of 0.0005 to 0.0050% by mass as required additional elements, P within the range of 0.025% or less and S within the range of 0.015% or less by mass as optional additional elements, and the remainder as Fe and unavoidable impurities. |
