Method of manufacturing hot dip galvannealed steel sheet and hot dip galvannealed steel sheet
    4.
    发明授权
    Method of manufacturing hot dip galvannealed steel sheet and hot dip galvannealed steel sheet 有权
    热浸合金化热镀锌钢板和热浸合金化热镀锌钢板的制造方法

    公开(公告)号:US08268095B2

    公开(公告)日:2012-09-18

    申请号:US12226168

    申请日:2007-04-26

    IPC分类号: C23C22/48 C23C22/05

    摘要: A method of manufacturing a hot dip galvannealed steel sheet, including the steps of: subjecting a steel sheet to hot dip galvanizing to manufacture a hot dip galvanized steel sheet; heating the hot dip galvanized steel sheet for alloying; subjecting the hot dip galvanized steel sheet to temper rolling; bringing the temper-rolled hot dip galvanized steel sheet into contact with an acid solution containing at least one ion selected from the group consisting of Zr ions, Ti ions, and Sn ions to thereby form an acid solution film on the surface of the steel sheet; after completion of the contact, a state where the acid solution film is formed on the surface of the steel sheet is held for at least 1 second; and washing with water the hot dip galvanized steel sheet after holding, to thereby form a Zn oxide layer having a thickness of 10 nm or more on the surface of the galvanized steel sheet. The hot dip galvannealed steel sheet has an oxide layer having an average thickness of 10 nm or more on the surface of the plated steel sheet.

    摘要翻译: 一种制造热浸镀锌钢板的方法,包括以下步骤:对钢板进行热浸镀锌以制造热浸镀锌钢板; 加热热镀锌钢板进行合金化; 对热浸镀锌钢板进行回火轧制; 使回火热浸镀锌钢板与含有选自Zr离子,Ti离子和Sn离子中的至少一种离子的酸溶液接触,从而在钢板表面形成酸溶液膜 ; 接触完成后,在钢板表面形成酸溶液膜的状态保持至少1秒钟; 并在保持之后用水洗涤热浸镀锌钢板,从而在镀锌钢板的表面上形成厚度为10nm以上的Zn氧化物层。 热镀锌合金化热镀锌钢板在镀覆钢板的表面上具有平均厚度为10nm以上的氧化物层。

    Method for manufacturing galvannealed steel sheet
    8.
    发明申请
    Method for manufacturing galvannealed steel sheet 审中-公开
    合金化热镀锌钢板的制造方法

    公开(公告)号:US20070122554A1

    公开(公告)日:2007-05-31

    申请号:US10575054

    申请日:2004-12-16

    IPC分类号: B05D3/02

    摘要: A galvannealed steel sheet is manufactured by preparing a hot-dip galvanized steel sheet, alloying the steel sheet, and controlling time and temperature for alloying thereof depending on Si and Al contents. The hot-dip galvanized steel sheet contains 0.05 to 0.30% C, 0.01 to 2.0% Si, 0.08 to 3.0% Mn, 0.003 to 0.1% P, 0 to 0.07% S, 0.01 to 2.5% Al, 0 to 0.007% N, by mass, and the balance being Fe and inevitable impurities. Alloying time and temperature are controlled by the formula [Si+Al≧1.5×10−7×t0.75×(T−465)3+0.117], where t is the total time (sec) of holding the sheet at 465° C. or more on alloying the coating layer thereon, and T is the average temperature (° C.) of the sheet during the total time t (sec) of holding the steel sheet at 465° C. or more on alloying the coating layer thereon.

    摘要翻译: 通过制备合金化钢板的热镀锌钢板,根据Si和Al含量控制其合金化的时间和温度来制造合金化热浸镀锌钢板。 该热镀锌钢板含有0.05〜0.30%的C,0.01〜2.0%的Si,0.08〜3.0%的Mn,0.003〜0.1%的P,0〜0.07%的S,0.01〜2.5%的Al,0〜0.007%的N, ,余量为Fe和不可避免的杂质。 合金时间和温度由公式[Si + Al> = 1.5×10 -7 -7×0.75×(T-465)3 + 0.117],其中t是在465℃或更高的时间将片材保持在其上的涂层上的总时间(秒),T是在总时间t内的片材的平均温度(℃)(℃) 秒),使钢板在其上合金化时为465℃以上。