PROCESS FOR MANUFACTURING A GALVANIZED OR A GALVANNEALED STEEL SHEET BY DFF REGULATION
    6.
    发明申请
    PROCESS FOR MANUFACTURING A GALVANIZED OR A GALVANNEALED STEEL SHEET BY DFF REGULATION 审中-公开
    通过DFF法规制造GALVANIZED或GALVANNEALE钢板的工艺

    公开(公告)号:WO2009004426A1

    公开(公告)日:2009-01-08

    申请号:PCT/IB2008/001494

    申请日:2008-06-11

    Abstract: The invention deals with a process for manufacturing a hot-dip galvanized or galvannealed steel sheet having a TRIP microstructure, said process comprising the steps consisting in: - providing a steel sheet whose composition comprises, by weight: 0.01 ≤ C ≤ 0.22%, 0.50 ≤ Mn ≤ 2.0%, 0.2 ≤ Si ≤ 2.0%, 0.005 ≤ Al ≤ 2.0%, Mo

    Abstract translation: 本发明涉及制造具有TRIP微观结构的热镀锌或合金化热镀锌钢板的方法,所述方法包括以下步骤: - 提供一种钢板,其组成包含:0.01 = C = 0.22%,0.50 = Mn = 2.0%,0.2 = Si = 2.0%,0.005 = Al = 2.0%,Mo <1.0%,Cr = 1.0%,P <0.02%,Ti = 0.20%,V = 0.40%,Ni = 1.0% Nb = 0.20%,组成为铁的余量和冶炼产生的不可避免的杂质,在空气与燃料比为0.80〜0.95的直接火焰炉中氧化所述钢板, 使得在钢板的表面上形成厚度为0.05〜0.2μm的氧化铁层,形成Si和/或Mn和/或Al的内部氧化物,将所述氧化钢板还原成 减少率为0.001〜0.010μm/ s,为了实现氧化铁层的还原, - 热浸镀锌所述减少 鳗鱼片形成镀锌钢板,并且任选地对所述热浸镀钢板进行合金化处理以形成合金化热浸镀锌钢板。

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