Ferrite-based hot-rolled stainless steel sheet, hot-rolled annealed sheet, and method for manufacturing said sheets
A technology of hot-rolled steel sheet and manufacturing method, applied in manufacturing tools, heat treatment furnaces, heat treatment equipment, etc., can solve the problems of corrosion, worry about exhaust gas, etc., and achieve the effect of sufficient corrosion resistance and restraint of deflection
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[0106] Hereinafter, the present invention will be described in detail through examples.
[0107] Molten stainless steel having the chemical composition shown in Table 1 was smelted by a converter with a capacity of 150 tons and refined by strong stirring and vacuum oxygen decarburization treatment (SS-VOD), and a steel billet with a width of 1000 mm and a thickness of 200 mm was produced by continuous casting. After heating this billet at 1200° C. for 1 hour, reverse rough rolling using a three-stage stand was performed as hot rolling to produce a steel plate of about 40 mm, and then a finish consisting of 7 passes was performed under the conditions described in Table 2. The final 3 passes of rolling (5th pass, 6th pass, 7th pass) are made into hot-rolled steel sheets. In addition, a part of the hot-rolled steel sheets (No. 25, 26, and 38 in Table 2) were hot-rolled and held for 8 hours under the conditions described in Table 2, followed by furnace-cooled hot-rolled sheet anne...
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