发明授权
EP2009130B1 PROCESS FOR PRODUCING ALLOYED HOT-DIP ZINC-COATED STEEL SHEET SATISFACTORY IN PROCESSABILITY, NON-POWDERING PROPERTY, AND SLIDING PROPERTY
有权
合金业务部门方法热镀锌钢板令人满意的加工,NICHTPULVERISIERUNGSEIGENSCHAFT和滑翔
- 专利标题: PROCESS FOR PRODUCING ALLOYED HOT-DIP ZINC-COATED STEEL SHEET SATISFACTORY IN PROCESSABILITY, NON-POWDERING PROPERTY, AND SLIDING PROPERTY
- 专利标题(中): 合金业务部门方法热镀锌钢板令人满意的加工,NICHTPULVERISIERUNGSEIGENSCHAFT和滑翔
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申请号: EP07740935.7申请日: 2007-03-28
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公开(公告)号: EP2009130B1公开(公告)日: 2013-05-08
- 发明人: HAJI, Junji , KAWASAKI, Kaoru , ISHIZUKA, Kiyokazu , YAMADA, Teruaki
- 申请人: Nippon Steel & Sumitomo Metal Corporation
- 申请人地址: 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 专利权人: Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人: Nippon Steel & Sumitomo Metal Corporation
- 当前专利权人地址: 6-1, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8071 JP
- 代理机构: Vossius & Partner
- 优先权: JP2006106528 20060407
- 国际公布: WO2007119665 20071025
- 主分类号: C21D9/46
- IPC分类号: C21D9/46 ; C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C23C2/04 ; C23C2/26 ; C23C2/02 ; C23C2/06 ; C23C2/28
摘要:
The present invention provides a method of production of hot dip galvannealed steel sheet with excellent workability compared with the Sendzimir method or non-oxidizing furnace method and further with excellent powdering or slidability, that is, a method of production of hot dip galvannealed steel sheet with excellent workability, powdering, and slidability characterized by processing a slab containing, by mass%, C: 0.01 to 0.12%, Mn: 0.05 to 0.6%, Si: 0.002 to 0.1%, P: 0.05% or less, S: 0.03% or less, sol. Al: 0.005 to 0.1%, and N: 0.01% or less and having a balance of Fe and unavoidable impurities by hot rolling, pickling, cold rolling, then annealing at 650 to 900°C, cooling to 250 to 450°C, holding at said temperature range for 120 seconds or more, then cooling to room temperature, pickling, preplating Ni or Ni-Fe without intermediate temper rolling, heating by 5°C/sec or more down to 430 to 500°C, galvanizing in a galvanization bath, wiping, then heating by a rate of temperature rise of 20°C/sec or more up to 460 to 550°C, not providing any soaking time or holding for soaking for less than 5 seconds, then cooling by 3°C/sec or more, and final temper rolling by a 0.4 to 2% elongation rate.
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