发明公开
- 专利标题: MANUFACTURE METHOD OF HIGH EFFICIENCY NON-ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE
- 专利标题(中): 方法对于具有高磁能高产高效没有对齐硅钢
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申请号: EP11835498.4申请日: 2011-04-27
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公开(公告)号: EP2532758A1公开(公告)日: 2012-12-12
- 发明人: MA, Aihua , WANG, Bo , XIE, Shishu , HU, Zhanyuan , ZOU, Liang , WANG, Zitao , ZHU, Yuhua , HUANG, Jie , JIN, Bingzhong , LIU, Xiandong
- 申请人: Baoshan Iron & Steel Co., Ltd.
- 申请人地址: No.885 Fujin Road Baoshan District Shanghai 201900 CN
- 专利权人: Baoshan Iron & Steel Co., Ltd.
- 当前专利权人: Baoshan Iron & Steel Co., Ltd.
- 当前专利权人地址: No.885 Fujin Road Baoshan District Shanghai 201900 CN
- 代理机构: Jennings, Nigel Robin
- 优先权: CN201010518012 20101025
- 国际公布: WO2012055224 20120503
- 主分类号: C21D8/12
- IPC分类号: C21D8/12 ; C22C38/60
摘要:
A manufacture method of high-efficiency non-oriented silicon steel with excellent magnetic property, which comprises the following steps: 1) smelting and casting; chemical compositions of non-oriented silicon steel, by weight percent, are: C≤ 0.0040%, Si:0.1∼0.8%, Al:0.002∼1.0%, Mn:0.10∼1.50%, P:≤0.2%, Sb:0.04∼0.08%, S≤0.0030%, N≤0.0020%, Ti ≤ 0.0020%, and the rest is Fe and unavoidable inclusions; molten steel in accordance with the above compositions is smelted and then casted into billets; 2) hot-rolling and pickling; heating temperature for slab is 1100 °C~1150 °C and finish-rolling temperature is 860 °C ∼920 °C; after rolling, the hot-rolled product is air cooled, during which air cooling time t: (2+30xSb%)s ≤t≤7s; thereafter reeling at a temperature ≥720°C ; 3) cold-rolling; rolling to form cold-rolled plate with target thickness at a reduction ratio of 70∼78%; 4) annealing; heating up the cold-rolled plate to 800∼1000 °C at heating rate of ≥ 15 °C/s, and holding time is 10~25s. Under the precondition to ensure magnetic properties, this invention implements low cost manufacture of high efficiency electric steel by adding elements advantageous to favorable texture during steel making, controlling contents of adverse elements and coordinating air cooling time control during hot-rolling with high temperature reeling.
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