| 摘要 |
In a method for producing a grain-oriented electrical steel sheet by including a series of steps of hot rolling a raw steel material containing C: 0.002-0.10 mass %, Si: 2.0-8.0 mass % and Mn: 0.005-1.0 mass % to obtain a hot rolled sheet, subjecting the hot rolled steel sheet after or without hot band annealing to one stage cold rolling or two or more stage cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to decarburization annealing combined with primary recrystallization annealing, applying an annealing separator to the steel sheet surface, and then subjecting to a final annealing. |
| 主权项 |
1. A method for producing a grain-oriented electrical steel sheet, the method comprising:
hot rolling a raw steel material to obtain a hot rolled steel sheet, the raw steel material including:
C: 0.002-0.10, by mass %,Si: 2.0-8.0, by mass %,Mn: 0.005-1.0, by mass %,Al: less than 0.01, by mass %,N: less than 0.0050, by mass %,Se: less than 0.0030, by mass %,S: less than 0.0050, by mass %, andFe and inevitable impurities; optionally, hot band annealing the hot rolled steel sheet; then, subjecting the hot rolled steel sheet after or without hot band annealing to one stage cold rolling or two or more stage cold rollings including an intermediate annealing therebetween to obtain a cold rolled steel sheet having a final sheet thickness; subjecting the cold rolled steel sheet to decarburization annealing combined with primary recrystallization annealing, and during the decarburization annealing, rapid heating of the steel sheet is performed at a rate of not less than 50° C./s in a range of 200-700° C. and the steel sheet is held within the temperature range of 250-600° C. for 1-10 seconds; then, applying an annealing separator to a surface of the steel sheet; and then, subjecting the steel sheet to a final annealing. |
