发明授权
- 专利标题： Method for manufacturing cold rolled, non-directional electrical steel sheets and strips having a high magnetic flux density
- 专利标题（中）： 制造具有高磁通密度的冷轧，非定向电工钢板和钢带的方法
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申请号： US481890申请日： 1974-06-21
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公开(公告)号： US3948691A公开(公告)日： 1976-04-06
- 发明人: Izumi Matsushita , Takayasu Sugiyama , Masakatsu Sumimoto , Osamu Honjo
- 申请人： Izumi Matsushita , Takayasu Sugiyama , Masakatsu Sumimoto , Osamu Honjo
- 申请人地址： JA Tokyo
- 专利权人： Nippon Steel Corporation
- 当前专利权人： Nippon Steel Corporation
- 当前专利权人地址： JA Tokyo
- 优先权： JA45-83780 19700926
- 主分类号： C21D8/12
- IPC分类号： C21D8/12 ; C22C38/02 ; H01F1/16 ; H01F1/04
摘要：
A method for manufacturing cold rolled, nondirectional electrical steel sheets and strips having a high magnetic flux density wherein a molten steel is solidified to obtain a slab in a manner that columnar grains develop predominantly from the surface in the direction of thickness of the slab up to a depth of more than 50%; said slab is heated to a temperature above 1000.degree.C without cogging and rolling to form .gamma.-phase at least more than about 10% of said slab, and hot rolled strongly with a draft of more than 98% without reheating to obtain a hot rolled steel sheet; and said hot rolled steel sheet is cold rolled with a draft of 64 - 84%, heated with a heating velocity of more than 1.6.degree.C/sec., and annealed at a temperature of 600.degree. - 1200.degree.C.
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