| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a hot rolling method for a Cu-containing steel member where Cu is made harmless, to obtain a rolled steel member free from red shortness and having excellent surface properties. <P>SOLUTION: In the hot rolling method for a Cu-containing steel member comprising, by mass, 0.05 to 2.1% Cu: the rolling temperature when the steel member is first rolled after heating is≥1,080°C; the draft r upon heating is≥1,080°C, and further the draft r at this time is controlled to the following range, 0<r<-7.748×1n(C<SB>Cu</SB>)+5.678 (0.05≤C<SB>Cu</SB>≤2.1), wherein r is the draft (%) per first pass in the rough rolling, and C<SB>Cu</SB>is the Cu concentration (mass%) in the steel. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
