Patent ID: 7641747

Claim:
A producing method of a rolling member comprising; preparing a steel containing at least carbon of 0.4 to 1.5 wt % and Cr of 2 wt % or less and having cementite and ferrite, in which an alloy composition of the cementite is regulated so that concentrations of the alloy elements in austenite formed at a heating temperature of the succeeding step is equal to concentrations of the alloy elements in the cementite of said steel and activity of carbon in a carbon concentration on a solid soluble line of cementite to the formed austenite is lower than activity of carbon contained in the austenite of said steel, and, a quenching step such that said steel is induction heated from a surface layer thereof up to two or more temperatures within a range of Ac1 temperature to 1150° C. or Ac3 temperature to 1150° C. and then quenched, wherein said preparing step has a process for heat treating said steel such that cementite dispersed in said steel contains Cr in a content of 3.5 to 12 wt %.