发明申请
- 专利标题: MANUFACTURING METHOD OF ORIENTED SI STEEL WITH HIGH ELECTRIC-MAGNETIC PROPERTY
- 专利标题(中): 具有高电磁性能的定向钢的制造方法
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申请号: US12934897申请日: 2009-03-25
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公开(公告)号: US20110139313A1公开(公告)日: 2011-06-16
- 发明人: Guohua Yang , Huande Sun , Yaming Ji , Guobao Li , Hongxu Hei
- 申请人: Guohua Yang , Huande Sun , Yaming Ji , Guobao Li , Hongxu Hei
- 申请人地址: CN Shanghai
- 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: CN Shanghai
- 优先权: CN200810035079.6 20080325
- 国际申请: PCT/CN2009/071003 WO 20090325
- 主分类号: C21D8/00
- IPC分类号: C21D8/00 ; C21D6/00
摘要:
A manufacturing method of oriented Si steel with high electric-magnetic property comprises the following steps: smelting steel in converter or electric furnace; refining molten steel in two stages; continuous casting to obtain slab; hot rolling; first cold rolling; decarburizing annealing; secondary cold rolling; applying an annealing separator based on MgO and annealing at high temperature; applying an insulating coating and leveling tension annealing. The slab comprises (in wt %): C 0.020-0.050%, Si 2.6-3.6%, S 0.015-0.025%, Als 0.008-0.028%, N 0.005-0.020%, Mn 0.15-0.5%, Cu 0.3-1.2%, balance Fe and inevitable impurities, in which 10≦Mn/S≦20 and Cu/Mn≧2. The method could produce oriented Si steel with high magnetic induction intensity and low iron loss at low cost.