Cold rolled steel sheet and hot dip zinc-coated cold rolled steel sheet
having excellent bake hardenability, non-aging properties and
formability, and process for producing same
    22.
    发明授权
    Cold rolled steel sheet and hot dip zinc-coated cold rolled steel sheet having excellent bake hardenability, non-aging properties and formability, and process for producing same 失效
    烘烤硬化性,非时效性和成型性优异的冷轧钢板和热浸镀锌冷轧钢板及其制造方法

    公开(公告)号:US5470403A

    公开(公告)日:1995-11-28

    申请号:US196098

    申请日:1994-02-18

    摘要: The present invention provides a cold rolled steel sheet and a hot dip zinc-coated cold rolled steel sheet excellent in paint bake hardenability, non-aging properties and formability, and a process for producing the same. In the present invention, an extremely low carbon steel or extremely low carbon steel containing at least one element selected from the group consisting of Ti and Nb is used as a base steel, and Mn and Cr are positively added thereto, whereby the resultant steel has a mixed structure after annealing. Accordingly, there can be obtained a steel sheet having both a high paint bake hardenability and non-aging properties, and being excellent in formability such as an average r-value (deep drawability). With regard to the paint bake hardenability, the present invention may provide a cold rolled steel sheet and a hot dip zinc-coated cold rolled steel sheet to which paint bake hardening may be optionally imparted in an amount as large as about 10 kgf/mm.sup.2 and which also have non-aging properties.

    摘要翻译: PCT No.PCT / JP93 / 00846 Sec。 371日期1994年2月18日 102(e)1994年2月18日PCT 1993年6月22日PCT公布。 出版物WO94 / 00615 日本1994年1月6日。本发明提供了优异的油漆烘烤硬化性,非时效性和成形性的冷轧钢板和热浸镀锌冷轧钢板及其制造方法。 在本发明中,使用含有选自Ti和Nb中的至少一种元素的极低碳钢或极低碳钢作为基础钢,并且向其中积极添加Mn和Cr,由此得到的钢具有 退火后的混合结构。 因此,可以获得具有高油漆烘烤硬化性和不老化性能的钢板,并且具有优异的成形性,例如平均r值(深冲性)。 关于油漆烘烤淬透性,本发明可以提供冷轧钢板和热浸镀锌冷轧钢板,其中可以任选地赋予大约10kgf / mm2的量的油漆烘烤硬化, 这也具有非老化性能。

    High-strength hot-rolled steel sheet excellent in shape fixability and method of producing the same
    29.
    发明授权
    High-strength hot-rolled steel sheet excellent in shape fixability and method of producing the same 有权
    定形性优异的高强度热轧钢板及其制造方法

    公开(公告)号:US07485195B2

    公开(公告)日:2009-02-03

    申请号:US10561133

    申请日:2004-06-28

    摘要: A high-strength hot-rolled steel sheet excellent in shape fixability having ferrite or bainite as the phase of the largest volume percentage, satisfying all of the following at least at ½ sheet thickness: a mean value of X-ray random intensity ratio in the orientation component group of {100} to {223} to X-ray random diffraction intensity ratio of at least 2.5; a mean value of X-ray random intensity ratio in the three crystal orientation components of {554} , {111} , and {111} to X-ray random diffraction intensity ratio of 3.5 or less; an X-ray intensity ratio to X-ray random diffraction intensity ratio at {100} of at least the X-ray random intensity to X-ray random diffraction intensity ratio at {211} ; and an X-ray random intensity ratio to X-ray random intensity ratio diffraction intensity ratio at {100} of at least 2.5, having at least one of an r-value of the rolling direction and an r-value of a direction perpendicular to the rolling direction of not more than 0.7, having an anisotropy ΔuE1 of uniform elongation of not more than 4%, having an anisotropy ΔLE1 of local elongation of at least 2%, and having an ΔuE1 of not more than the ΔLE1.

    摘要翻译: 一种具有铁素体或贝氏体作为最大体积百分比的相位的定形性优异的高强度热轧钢板,满足以下所有以下至少1/2片厚:X射线随机强度比的平均值 {100} <011>至{223} <110>的取向成分组与X射线随机衍射强度比为2.5以上; {554} 225,{111} <112>和{111} <110>的三个晶体取向成分的X射线随机强度比的X射线随机强度比的平均值与3.5以下的X射线随机衍射强度比 ; 至少在{211} <011>的X射线随机强度与X射线随机衍射强度比的{100} <011>的X射线强度比与X射线随机衍射强度比的X射线强度比。 并且在{100} <011>下的X射线随机强度比与X射线随机强度比衍射强度比至少为2.5,具有轧制方向的r值和r值的至少一个 具有垂直于轧制方向的方向不大于0.7,具有不大于4%的均匀伸长率的各向异性DeltauE1,具有至少2%的局部伸长率的各向异性ΔLE1,并且DeltauE1不大于ΔLE1。