发明公开
EP1099230A1 ELECTRICAL STEEL WITH IMPROVED MAGNETIC PROPERTIES IN THE ROLLING DIRECTION
审中-公开
在轧制方向提高了磁性能电工钢片
- 专利标题: ELECTRICAL STEEL WITH IMPROVED MAGNETIC PROPERTIES IN THE ROLLING DIRECTION
- 专利标题(中): 在轧制方向提高了磁性能电工钢片
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申请号: EP99926148.0申请日: 1999-06-03
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公开(公告)号: EP1099230A1公开(公告)日: 2001-05-16
- 发明人: ANDERSON, Jeffrey, P. , LAUER, Barry, A.
- 申请人: LTV Steel Company, Inc.
- 申请人地址: 200 Public Square Cleveland,Ohio 44114-2308 US
- 专利权人: LTV Steel Company, Inc.
- 当前专利权人: LTV Steel Company, Inc.
- 当前专利权人地址: 200 Public Square Cleveland,Ohio 44114-2308 US
- 代理机构: Wise, Stephen James
- 优先权: US105802 19980619
- 国际公布: WO9966516 19991223
- 主分类号: H01F1/14
- IPC分类号: H01F1/14 ; H01F1/16 ; H01F1/18
摘要:
A method of making electrical steel strip characterized by low core loss and high permeability in the rolling direction includes the steps of: hot rolling a slab of an electrical steel composition into a strip, hot band annealing in a temperature range effective to coarsen the grains sufficient to improve magnetic properties in a rolling direction of the strip, cold rolling, batch annealing in a temperature range effective to produce a batch annealed grain size of not greater than 40 νm and, preferably not greater than 20 νm, and temper rolling to provide the strip with a transfer surface roughness (Ra) of less than 49 νin. Electrical steel articles are manufactured from the steel strip upon final annealing. The electrical steel articles have a grain texture including a {110}∫001⊃ orientation and improved permeability in the rolling direction.
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