| 摘要 |
PURPOSE: A method for manufacturing ferritic stainless steel bright annealing plates is provided to improve oxidation resistance by controlling cooling rate after cold rolling process. CONSTITUTION: In an annealing method of a cold rolled steel sheet comprising C 0.1 wt.% or less, Cr 10 to 20 wt.%, Ni 1.0 wt.% or less, N 0.1 wt.% or less, Si 1.0 wt.% or less, Mn 2.0 wt.% or less, Ti 0.5 wt.% or less, Nb 0.6 wt.% or less, Mo 2.0 wt.% or less, Cu 1.0 wt.% or less, a balance of Fe and other inevitable impurities at 900 to 120 0°C in a reductive atmosphere of hydrogen and nitrogen, the present invention is characterized in that when cooling the cold rolled steel sheet from annealing temperature to 300°C, the cooling rate of the cold rolled steel sheet is controlled to 20-30°C/sec.
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