STEEL FOR HIGH FREQUENCY HARDENING, ROUGHLY MOLDED MATERIAL FOR HIGH FREQUENCY HARDENING AND PROCESS FOR PRODUCTION THEREOF, AND HIGH-FREQUENCY-HARDENED STEEL MEMBER

摘要

The high-frequency quenching steel contains, in terms of mass%, at least one of 0.75% to 1.20% of C, 0.002 to 3.00% of Si, 0.20 to 2.00% of Mn, 0.002 to 0.100% of S, , The content of P is 0.050% or less, the content of N is 0.0200% or less, the content of O is limited to 0.0030% or less, the balance of Fe and inevitable impurities is contained, 27/14) x N 0.050%.