| 摘要 |
PURPOSE: To improve ridging resistance and surface characteristic by subjecting a slab, containing specific amounts of C, Si, Mn, N, Cr, Al, and Fe, to hot rolling and continuous annealing under respectively specified conditions and applying cold rolling and recrystallization annealing to the resultant plate. CONSTITUTION: A slab, having a composition consisting of, by weight, 0.02-0.05% C, <1% Si, <=1.5% Mn, 0.01-0.03% N, 15-18% Cr, 0.1-0.3% Al, and the balance essentially Fe, is used. This slab is heated to 1100-11200 deg.C and hot-rolled. The resultant plate is continuously annealed under the conditions of 1000-1100 deg.C annealing temp. and rapid cooling at >=15 deg.C/sec cooling rate. Then, cold rolling and recrystallization annealing are carried out. When low temp. heating is done at >=1200 deg.C, the precipitation ofγ-phase can be prevented at the time of rolling and the structure is in a state in which AlN is precipitated, and a fine equiaxial crystalline structure can be formed by continuous annealing. By increasing Al content and decreasing C content, the transformation point is raised and high temp. annealing at >=1000 deg.C is made possible.
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