Method for manufacturing hot dip galvanized steel sheet
    1.
    发明授权
    Method for manufacturing hot dip galvanized steel sheet 有权
    热镀锌钢板的制造方法

    公开(公告)号:US09260774B2

    公开(公告)日:2016-02-16

    申请号:US13638188

    申请日:2011-03-14

    摘要: An object of the present invention is to make it possible, without necessitating an alkali pretreatment, to form a zinc oxide layer having excellent sliding properties on a hot dip galvanized steel sheet not subjected to alloying after galvanizing and thus having a relatively low degree of surface activity. Another object of the present invention is to make it possible to manufacture a hot dip galvanized steel sheet having higher area ratio of Zn oxide layer formed on a coating surface and larger thickness of the Zn oxide layer. Specifically, the present invention provides a method for manufacturing a hot dip galvanized steel sheet comprising: subjecting a steel sheet to hot dip galvanizing and subsequent temper rolling; bringing the steel sheet into contact with acidic solution having pH buffering capacity; retaining the steel sheet for 1 second to 60 seconds after the contact with the acidic solution; and rinsing the steel sheet with water, to form a zinc oxide layer on a coating surface of the steel sheet, characterized in that the method further comprising:carrying out the temper rolling by either rolling the steel sheet first with a dull roll having Ra≧2.0 μm at rolling reduction rate ≦5% and then with a bright roll having Ra≦0.1 μm at rolling reduction rate ≦3% or rolling the steel sheet first with a bright roll having Ra≦0.1 μm at rolling reduction rate ≦3% and then with a dull roll having Ra≦2.0 μm at rolling reduction rate ≦5%.

    摘要翻译: 本发明的目的是,在不需要碱预处理的情况下,可以在镀锌后未进行合金化的热镀锌钢板上形成具有优异滑动性的氧化锌层,从而具有相对低的表面度 活动。 本发明的另一个目的是使得可以制造具有在涂层表面上形成的较高面积比的Zn氧化物层和较大厚度的氧化锌层的热浸镀锌钢板。 具体而言,本发明提供一种热镀锌钢板的制造方法,其特征在于,包括:对钢板进行热浸镀锌和随后的回火轧制; 使钢板与具有pH缓冲能力的酸性溶液接触; 在与酸性溶液接触后将钢板保持1秒至60秒; 并用水冲洗钢板,在钢板的涂层表面上形成氧化锌层,其特征在于,还包括:通过用Ra≧的钝辊首先轧制钢板进行回火轧制, 轧制压下率为2.0μm,nlE为5%,然后以Ra&nlE为光亮辊;在轧制压下率为0.1μm的条件下,首先用Ra&nlE的光辊轧制钢板,轧制压下率为0.1μm; 3%,然后用具有Ra&nlE的钝辊;2.0μm的轧制压下率≦̸ 5%。

    METHOD FOR MANUFACTURING HOT DIP GALVANIZED STEEL SHEET
    2.
    发明申请
    METHOD FOR MANUFACTURING HOT DIP GALVANIZED STEEL SHEET 有权
    制造热镀锌钢板的方法

    公开(公告)号:US20130086960A1

    公开(公告)日:2013-04-11

    申请号:US13638188

    申请日:2011-03-14

    IPC分类号: C23C2/26 C23C2/06

    摘要: An object of the present invention is to make it possible, without necessitating an alkali pretreatment, to form a zinc oxide layer having excellent sliding properties on a hot dip galvanized steel sheet not subjected to alloying after galvanizing and thus having a relatively low degree of surface activity. Another object of the present invention is to make it possible to manufacture a hot dip galvanized steel sheet having higher area ratio of Zn oxide layer formed on a coating surface and larger thickness of the Zn oxide layer. Specifically, the present invention provides a method for manufacturing a hot dip galvanized steel sheet comprising: subjecting a steel sheet to hot dip galvanizing and subsequent temper rolling; bringing the steel sheet into contact with acidic solution having pH buffering capacity; retaining the steel sheet for 1 second to 60 seconds after the contact with the acidic solution; and rinsing the steel sheet with water, to form a zinc oxide layer on a coating surface of the steel sheet, characterized in that the method further comprising: carrying out the temper rolling by either rolling the steel sheet first with a dull roll having Ra≧2.0 μm at rolling reduction rate ≦5% and then with a bright roll having Ra≦0.1 μm at rolling reduction rate ≦3% or rolling the steel sheet first with a bright roll having Ra≦0.1 μm at rolling reduction rate ≦3% and then with a dull roll having Ra≦2.0 μm at rolling reduction rate ≦5%.

    摘要翻译: 本发明的目的是,在不需要碱预处理的情况下,可以在镀锌后未进行合金化的热镀锌钢板上形成具有优异滑动性的氧化锌层,从而具有相对低的表面度 活动。 本发明的另一个目的是使得可以制造具有在涂层表面上形成的较高面积比的Zn氧化物层和较大厚度的氧化锌层的热浸镀锌钢板。 具体而言,本发明提供一种热镀锌钢板的制造方法,其特征在于,包括:对钢板进行热浸镀锌和随后的回火轧制; 使钢板与具有pH缓冲能力的酸性溶液接触; 在与酸性溶液接触后将钢板保持1秒至60秒; 并用水冲洗钢板,在钢板的涂层表面上形成氧化锌层,其特征在于,还包括:通过用Ra≧的钝辊首先轧制钢板进行回火轧制, 轧制压下率为2.0μm,nlE为5%,然后以Ra&nlE为光亮辊;在轧制压下率为0.1μm的条件下,首先用Ra&nlE的光辊轧制钢板,轧制压下率为0.1μm; 3%,然后用具有Ra&nlE的钝辊;2.0μm的轧制压下率≦̸ 5%。

    GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME
    7.
    发明申请
    GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME 审中-公开
    钢化钢板及其制造方法

    公开(公告)号:US20110226387A1

    公开(公告)日:2011-09-22

    申请号:US13129504

    申请日:2009-04-22

    IPC分类号: C23C22/05 C22C38/00

    CPC分类号: C23C2/26 C23C8/02 C23C22/53

    摘要: A method for manufacturing a galvanized steel sheet, includes: galvanizing a steel sheet; bringing the surface of the steel sheet into contact with an aqueous solution containing zinc ion in the range of 5 to 100 g/l as the zinc ion concentration, having a pH of 4 to 6, and having a liquid temperature of 20 to 70° C., holding the steel sheet for 1 to 60 seconds; and then washing and drying the steel sheet. The solution containing zinc is preferably one containing zinc sulfate, for example. According to the method, a galvanized steel sheet having an oxide layer having an average thickness of 10 nm or more and mainly containing zinc formed on the surface of the steel sheet and having excellent press formability can be stably manufactured in a short time.

    摘要翻译: 一种镀锌钢板的制造方法,包括:镀锌钢板; 使钢板的表面与含有5〜100g / l的锌离子的水溶液作为锌离子浓度接触,pH为4〜6,液温为20〜70℃ C.保持钢板1〜60秒; 然后洗涤和干燥钢板。 含锌的溶液例如优选含有硫酸锌的溶液。 根据该方法,可以在短时间内稳定地制造具有平均厚度为10nm以上且主要含有形成在钢板表面上的锌并且具有优异的压制成形性的氧化物层的镀锌钢板。