Hot Rolling Method for Reducing Surface Defects in Austenitic Stainless Steels

摘要

The present invention relates to a method of hot-rolling austenitic stainless steel slabs; The object of the present invention is to provide a hot rolling method for reducing surface defects during hot rolling by controlling the surface scale formed on the surface of the slab to an appropriate thickness and omitting the pressure-sagging during rough rolling.;In order to achieve the above object, the present invention provides a ferritic stainless steel comprising 0.08% or less of C, 1.0% or less of Si, 2.0% or less of Mn, 0.040% or less of P, 0.030% or less of S, 18.0 to 20.0% An austenitic stainless steel slab containing 8.0 to 10.5% of Ni and the balance of Fe and other inevitably contained impurities is heated at a temperature of 1220 to 1270C for 180 to 240 minutes in a coke oven gas (COG) (BFG) is used as a fuel to be heated in a heating furnace and subjected to a pressure-stretched flame at the time of rough rolling, wherein the excess oxygen amount in the heating furnace atmosphere is set to 5.0 to 8.0 vol% The present invention relates to a hot rolling method for improving the surface quality of austenitic stainless steels that omits the extensional pressure during rolling.