发明申请
- 专利标题： METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTROMAGNETIC STEEL SHEET WHOSE MAGNETIC DOMAINS ARE CONTROLLED BY LASER BEAM IRRADIATION
- 专利标题（中）： 用于激光光束辐射控制磁场的制粒电磁电磁片的方法
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申请号： US12744583申请日： 2008-12-11
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公开(公告)号： US20100243629A1公开(公告)日： 2010-09-30
- 发明人: Tatsuhiko Sakai , Hideyuki Hamamura , Masao Yabumoto
- 申请人： Tatsuhiko Sakai , Hideyuki Hamamura , Masao Yabumoto
- 优先权： JP2007-320615 20071212
- 国际申请： PCT/JP2008/072525 WO 20081211
- 主分类号： B23K26/00
- IPC分类号： B23K26/00
摘要：
There is provided a method for manufacturing a grain-oriented electromagnetic steel sheet whose iron losses are reduced by laser beam irradiation, capable of improving the iron losses in both the L-direction and the C-direction while easily ensuring high productivity. The method for manufacturing a grain-oriented electromagnetic steel sheet reduces iron losses by scanning and irradiating a grain-oriented electromagnetic steel sheet with a continuous-wave laser beam condensed into a circular or elliptical shape at constant intervals in a direction substantially perpendicular to a rolling direction of the grain-oriented electromagnetic steel sheet, wherein when an average irradiation energy density Ua is defined as Ua=P/(Vc×PL) (mJ/mm2), where P (W) is average power of the laser beam, Vc (m/s) is a beam scanning velocity, and PL (mm) is an irradiation interval in a rolling direction, PL and Ua are in the following ranges: 1.0 mm≦PL≦3.0 mm, 0.8 mJ/mm2≦Ua≦2.0 mJ/mm2.