| 摘要 |
PROBLEM TO BE SOLVED: To produce a hot-rolled steel plate having excellent surface property, where since the generation of fayalite is not avoided caused by a high Si contained in the steel, and this fayalite is remained and as a result, the surface property of the hot-rolled steel plate deteriorates, therefore this deterioration of the surface property of the hot-rolled steel plate caused by this fayalite, is not made to generate. SOLUTION: This hot-rolling method is performed as the followings, that after soaking a steel slab containing 0.2-3.0% Si under atmospheric condition of 1173-1250°C temperature of a heating furnace (T°C) and oxygen concentration (Xvol%) in the heating furnace; X≤-0.0260T+32.468 for 20-60 min, this slab is picked up from the heating furnace, and performing at least the first descaling at≥1173°C. COPYRIGHT: (C)2009,JPO&INPIT
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