METHOD OF MANUFACTURING FERRITIC STAINLESS STEEL TO IMPROVE RIDGING PROPERTY

摘要

The present invention improves a ferritic stainless steel containing 16 ~ 20% Leasing sex chromium (Cr) relates to a method for . The present invention in weight % , C 0.05% or less , Ti 0.7% or less , Si 1.0% or less , Mn 1.0% or less , P 0.04% or less , S 0.03% or less , Cr 16.0 ~ 20%, Ni 0.5% or less , Mo 1.0 % or less , N 0.05% or less , Cu 1.0% or less , Al 0.15% or less , balance Fe and other impurities, consisting of a conventional stainless steel slab to a hot rolling step at the rolling reduction of the rough rolling pass is 40% or more than twice that , to a reduction rate of 30% or more pass from the spirit rolling to 3 times or more , shape factor (l / d) value is the ridging characteristic , characterized in that the path to be 3.5 or more to less than 4 times the ferritic stainless steel excellent provides a process for the preparation .