| 摘要 |
Disclosed is a process for producing a hot-rolled steel sheet, the process comprising a slab heating step in which a steel slab is heated in a slab heating furnace, a step in which the heated steel slab is hot-rolled with a rough roller and a finish roller to form a strip, and a winding step in which the strip is wound up with a wind-up machine. The series of steps ranging from the slab heating step to the winding step is conducted in a non-oxidizing atmosphere. The steel slab contains, in terms of mass%, 0.01-0.15% C, 0.1-1.8% Si, 1.0-2.7% Mn, 0.01-1.5% Al, 0.005-0.025% P, and up to 0.01% S. Also disclosed is a hot-dip galvanized steel sheet produced by pickling the hot-rolled steel sheet to remove the oxide scale, optionally cold-rolling the steel sheet, and thereafter plating the steel sheet with zinc by hot dipping.
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