发明授权
US5677005A Method for hot dip galvanizing high tensile steel strip with minimal
bare spots
失效
热浸镀锌高拉伸钢带的方法,具有最小的裸露点
- 专利标题: Method for hot dip galvanizing high tensile steel strip with minimal bare spots
- 专利标题(中): 热浸镀锌高拉伸钢带的方法,具有最小的裸露点
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申请号: US381971申请日: 1995-02-13
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公开(公告)号: US5677005A公开(公告)日: 1997-10-14
- 发明人: Makoto Isobe , Nobue Fujibayashi , Kazuaki Kyono , Nobuo Totsuka , Nobuyuki Morito
- 申请人: Makoto Isobe , Nobue Fujibayashi , Kazuaki Kyono , Nobuo Totsuka , Nobuyuki Morito
- 申请人地址: JPX
- 专利权人: Kawasaki Steel Corporation
- 当前专利权人: Kawasaki Steel Corporation
- 当前专利权人地址: JPX
- 优先权: JPX5-155110 19930625; JPX6-029775 19940228; JPX6-029776 19940228
- 主分类号: C23C2/02
- IPC分类号: C23C2/02 ; B05D3/02
摘要:
In connection with the manufacture of zinc hot dip galvanized or galvannealed steel strip using a high strength, high tensile steel strip containing Si, Mn or Cr as a starting steel strip, the invention provides a method for hot dip galvanizing a high tensile steel strip with minimal bare spots which can manufacture a bare spot-free steel strip of quality in an inexpensive manner while minimizing process complications and lowered productivity. The invention is achieved by subjecting a cold rolled steel strip containing at least one component of 0.1 to 2.0% of Si, 0.5 to 2.0% of Mn, and 0.1 to 2.0% of Cr and optionally further containing up to 0.2% of P, in % by weight, to recrystallization annealing in a continuous annealing line, cooling the steel strip, removing a steel component concentrated layer at the surface of the steel strip by polishing and/or pickling, subjecting the steel strip again to heat reduction at a temperature from 650.degree. C. to a recrystallization temperature and to hot dip galvanizing in a continuous galvanizing line, and optionally effecting overplating and/or alloying or effecting alloying followed by overplating.
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