| 摘要 |
PROBLEM TO BE SOLVED: To obtain high pickling efficiency at a low cost in the case the ferritic heat resisting steel sheet is pickled by using mixed acids of a pickling accelerator containing sulfuric acid and mercapto group. SOLUTION: The amount of precipitated P is specified to≥0.017% in pickling the ferritic heat resisting steel sheet containing, by mass, 0.0015 to 0.0080% C, 0.05 to 0.70% Si, 0.05 to 0.70% Mn, 0.017 to 0.035% P, 0.005 to 0.0010% S, 10.5 to 18.0% Cr, 0.001 to 0.050% Mo, 0.001 to 010% Cu, 0.0040 to 0.150% N, 10+(C+N)+2xP to 0.30% Ti, and the balance consisting of Fe and inevitable impurities by the mixed acids prepared by adding mercaptoacetic acid to sulfuric acid. COPYRIGHT: (C)2006,JPO&NCIPI
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