| 摘要 |
PURPOSE: A method for manufacturing ferritic stainless steel for welding structure is provided, which can produce a ferritic stainless steel for welding structure having equal quality of STS410L steel by the addition of Ni and Cu to conventional STS410L steel to widen possible temperature range for annealing. CONSTITUTION: The method for manufacturing ferritic stainless steel for welding structure includes step of continuous casting a steel comprising 0.02 wt.% or less of C, Si 0.2 to 0.4 wt.%, Mn 0.7 to 1.0 wt.%, 0.035 wt.% or less of P, 0.008 wt.% or less of S, Cr 11.0 to 11.6 wt.%, 0.020 wt.% or less of N, Cu 0.2 to 0.5 wt.%, Ni 0.5 to 1.0 wt.%, a balance of Fe and incidental impurities, followed by hot rolling; batch annealing the hot rolled steel strip at a temperature range of 640 to 680°C; cold rolling the steel strip; continuous annealing the steel strip under an atmosphere condition of 750 to 820°C; and pickling and temper rolling.
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