发明名称 |
METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET (AS AMENDED) |
摘要 |
In a method for producing a grain-oriented electrical steel sheet by 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 sheet to a hot band annealing as required and further to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to a primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to a final annealing, when rapid heating is performed at a rate of not less than 50° C./s in a range of 100˜700° C. in the heating process of the primary recrystallization annealing, the steel sheet is subjected to a holding treatment at any temperature of 250˜600° C. for 0.5˜10 seconds 2 to 6 times to thereby obtain a grain-oriented electrical steel sheet being low in the iron loss and small in the deviation of the iron loss value. |
申请公布号 |
US2016012949(A1) |
申请公布日期 |
2016.01.14 |
申请号 |
US201414770913 |
申请日期 |
2014.02.24 |
申请人 |
JFE STEEL CORPORATION |
发明人 |
Uesaka Masanori;Imamura Takeshi;Suehiro Ryuichi;Fukunaga Takayuki;Takamiya Toshito |
分类号 |
H01F1/147;C21D3/04;C21D1/26;C21D9/46;C22C38/02;C22C38/60;C22C38/04;C22C38/16;C22C38/00;C22C38/06;C22C38/12;C22C38/40;C22C38/34;H01F1/16;H01F41/02;C21D8/12 |
主分类号 |
H01F1/147 |
代理机构 |
|
代理人 |
|
主权项 |
1. A method for producing a grain-oriented electrical steel sheet by 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 sheet to a hot band annealing as required and further to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to a primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to a final annealing, characterized in that when rapid heating is performed at a rate of not less than 50° C./s in a range of 100˜700° C. in the heating process of the primary recrystallization annealing, the steel sheet is subjected to a holding treatment at any temperature of 250˜600° C. for 0.5˜10 seconds 2 to 6 times. |
地址 |
Chiyoda-ku, Tokyo JP |