| 摘要 |
PROBLEM TO BE SOLVED: To provide a ferritic stainless steel having sufficient corrosion resistance, moldability and ridging resistance and also excellent in surface properties free from linear flaws caused by hot rolling and annealing, and a method for producing the same.SOLUTION: Provided is a ferritic stainless steel having a composition containing, by mass, 0.005 to 0.05% of C, 0.02 to 1.00% of Si, 0.05 to 0.60% of Mn, 0.04% or lower of P, 0.01% or lower of S, 15.5 to 18.0% of Cr, 0.001 to 0.10% of Al, 0.01 to 0.06% of N and 0.1 to 0.6% of Ni, and the balance Fe with inevitable impurities, and also satisfying Ni/Mn≥0.6 (Ni and Mn denote the contents (mass%) of the respective contents), and in which El≥25%, the average r value≥0.65 and ridging height≤2.5 μm are satisfied. The steel is subjected to annealing of being held in the temperature range of 900 to 1,050°C for 5 s to 15 min so as to be a hot rolled annealed sheet, is then subjected to cold rolling, and is subsequently subjected to cold rolled sheet annealing in the temperature of 800 to 950°C for 5 s to 5 min.SELECTED DRAWING: None |
