| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method useful for manufacturing a Si-containing hot-rolled steel sheet excelling in a pickling property, and a pickling method useful for obtaining a Si-containing hot-rolled steel sheet small in scale. <P>SOLUTION: In this method of manufacturing a Si-containing hot-rolled steel sheet, a hot-rolled Si-containing steel sheet respectively containing 0.04-0.2% of C, 0.1-3.0% of Si, 0.1-3.0% of Mn, P ≤0.02% (without including 0%) and S ≤0.004% (without including 0%), and having a residual part of iron and unavoidable impurities is heat-treated for 5-60 min to 700°C or above in a nitrogen atmosphere with O<SB POS="POST">2</SB>controlled to less than 1 vol.%. <P>COPYRIGHT: (C)2012,JPO&INPIT |
