发明授权
- 专利标题: Process for producing a zinc-plated steel sheet with an ageing resistance by hot dip-type, continuous zinc plating
- 专利标题(中): 通过热浸型连续镀锌制造耐老化性的镀锌钢板的方法
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申请号: US319946申请日: 1989-03-07
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公开(公告)号: US4960158A公开(公告)日: 1990-10-02
- 发明人: Teruaki Yamada , Osamu Akisue , Toshiyasu Ukena , Masahiko Oda , Teruki Hayashida
- 申请人: Teruaki Yamada , Osamu Akisue , Toshiyasu Ukena , Masahiko Oda , Teruki Hayashida
- 申请人地址: JPX 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: JPX Tokyo
- 优先权: JPX63-243471 19880928
- 主分类号: C23C2/02
- IPC分类号: C23C2/02 ; C23C2/06 ; C23C2/28 ; C23C2/40
摘要:
A zinc-plated steel sheet with an ageing resistance is produced from an Al-killed steel by hot dip type, continuous zinc plating including recrystallization and annealing, where after recrystallization and grain growth, the steel sheet is quenched at a cooling rate of 30.degree..about.250.degree. C/sec from 720.degree..about.600.degree. C. to 310.degree..about.200.degree. C.; after keeping the steel sheet at the same temperature for 0 to 15 seconds, the steel sheet is reheated to a molten zinc bath temperature; then the steel sheet is dipped into the molten zinc bath for zinc-plating; and then the steel sheet is cooled at a cooling rate of 250 to 5.degree. C./sec from that temperature to 350.degree. C.; and then the steel sheet is cooled at a specific average cooling rate in a temperature region of 350.degree. C. to 300.degree. C. and at a specific average cooling rate in a temperature region of from 300.degree. C. to 285.degree..about.220.degree. C.
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