METHOD FOR REDUCING RED SCALE ON SURFACE OF HOT-ROLLED STEEL SHEET AND METHOD FOR MANUFACTURING HOT-ROLLED STEEL SHEET USING SAME

摘要

A method for reducing red scale on the surface of a hot-rolled steel sheet and a method for manufacturing a hot-rolled steel sheet using the same are disclosed. A method for reducing red scale on the surface of a hot-rolled steel sheet according to the present invention re-heats a slab which contains 0.1 weight% or more of silicone (Si) based on the total weight at 1170?ƒ or lower temperatures and subsequently hot-rolls the slab.;COPYRIGHT KIPO 2014;[Reference numerals] (AA) Start;(BB) End;(S110) Reheat a slab;(S120) Hot-roll (FDT: 850~900?ƒ);(S130) Cool and wind (CT: 600~680?ƒ)