发明名称 |
PROCESS FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET WITH HIGH MAGNETIC FLUX DENSITY |
摘要 |
In a production of grain-oriented electrical steel sheet that is heated at a temperature of not higher than 1350°C, (a) the hot-rolled sheet is heated to a prescribed temperature of 1000°C to 1150°C, and after recrystallization is annealed for a required time at a lower temperature of 850°C to 1100°C, or (b) in the hot-rolled sheet annealing process decarburization is conducted to adjust the difference in the amount of carbon before and after decarburization to 0.002 to 0.02 mass%. In the temperature elevation process used in the decarburization annealing of the steel sheet, heating is conducted in the temperature range of 550°C to 720°C at a heating rate of at least 40°C/s, preferably 75 to 125°C/s, utilizing induction heating for the rapid heating used in the temperature elevation process in decarburization annealing. |
申请公布号 |
EP2025767(A1) |
申请公布日期 |
2009.02.18 |
申请号 |
EP20070744360 |
申请日期 |
2007.05.23 |
申请人 |
NIPPON STEEL CORPORATION |
发明人 |
USHIGAMI, YOSHIYUKI;FUJII, NORIKAZU;KUMANO, TOMOJI |
分类号 |
C21D9/46;C21D8/12;C22C38/00;C22C38/60;C23C8/26;C23C8/62;H01F1/16;H01F41/02 |
主分类号 |
C21D9/46 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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