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GRAIN ORIENTED MAGNETIC STEEL SHEET HAVING SHEET THICKNESS OF 0.12 TO 0.25 MM AND PRODUCTION METHOD THEREOF
GRAIN ORIENTED MAGNETIC STEEL SHEET HAVING SHEET THICKNESS OF 0.12 TO 0.25 MM AND PRODUCTION METHOD THEREOF
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机译:薄板厚度为0.12至0.25毫米的晶粒取向磁性钢板及其生产方法
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摘要
PROBLEM TO BE SOLVED: To inhibit iron loss deterioration due to unstable secondary recrystallization arising at a coil end in final annealing of a grain oriented magnetic steel sheet having a sheet thickness of 0.12 to 0.25 mm.;SOLUTION: A production method of a grain oriented magnetic steel sheet having a sheet thickness of 0.12 to 0.25 mm includes: heating at a temperature of 1,250°C or more, a steel slab containing C:0.04 to 0.12 mass%, Si:1.5 to 5.0 mass%, Mn:0.01 to 1.0 mass%, one or two kind selected from S and Se:0.005 to 0.05 mass% in total, sol.Al:0.010 to 0.027 mass%, N:0.0040 to 0.0110 mass%, sol.Al/N:1.50 to 2.50, B:1.2 mass ppm or less and the balance Fe with inevitable impurities; then performing hot rolling; performing cold rolling one time or 2 or more times with intermediate rolling interposed between them to obtain a cold rolled sheet having a final sheet thickness; performing primary recrystallization annealing, performing final annealing and further performing flattening annealing.;COPYRIGHT: (C)2014,JPO&INPIT
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