High-strength cold rolled steel sheet and process for producing the same
    3.
    发明授权
    High-strength cold rolled steel sheet and process for producing the same 有权
    高强度冷轧钢板及其制造方法

    公开(公告)号:US07559997B2

    公开(公告)日:2009-07-14

    申请号:US10496433

    申请日:2003-06-23

    摘要: The invention provides a high strength cold rolled steel sheet comprising ferrite phases and second phases, in which the mean grain size of the ferrite phases is 20 μm or less, the volume fraction of the second phase is 0.1% or more to less than 10%, the absolute value |Δr| of in-plane anisotropy of r value is less than 0.15, and the thickness is 0.4 mm or more. The high strength cold rolled steel sheet of the present invention has a tensile strength of 370 to 590 MPa, and has excellent stretchability, dent resistance, surface precision, secondary working embrittlement, anti-aging, and surface appearance, therefore it is suitable for outer panels of automobile.

    摘要翻译: 本发明提供一种包含铁素体相和第二相的高强度冷轧钢板,其中铁素体相的平均粒径为20μm以下,第二相的体积分数为0.1%以上且小于10% ,绝对值| Deltar | 的r值的面内各向异性小于0.15,厚度为0.4mm以上。 本发明的高强度冷轧钢板的拉伸强度为370〜590MPa,拉伸性,耐凹陷性,表面精度,二次加工脆性,耐老化性,表面外观优异,因此适用于外部 汽车面板

    High strength steel sheet and method for manufacturing the same
    4.
    发明申请
    High strength steel sheet and method for manufacturing the same 审中-公开
    高强度钢板及其制造方法

    公开(公告)号:US20060065329A1

    公开(公告)日:2006-03-30

    申请号:US11271428

    申请日:2005-11-10

    IPC分类号: C23C2/28

    摘要: The present invention relates to a high strength steel sheet consisting essentially of 0.04 to 0.1% C, 0.5% or less Si, 0.5 to 2% Mn, 0.05% or less P, 0.005% or less O, 0.005% or less S, by weight, having 10 μm or less of average ferritic grain size, and 20 mm/mm2 or less of generation frequency A, which generation frequency A is defined as the total length of a banded secondary phase structure observed per 1 mm2 of steel sheet cross section along the rolling direction thereof. The steel sheet is manufactured by, for example, a method comprising the steps of: hot-rolling a continuously cast slab having the composition described above at temperatures of Ar3 transformation point or above directly or after reheating thereof; and cooling the hot-rolled steel sheet within 2 seconds down to the temperatures of from 600 to 750° C. at cooling speeds of from 100 to 2,000° C./sec, followed by coiling the cooled steel sheet at temperatures of from 450 to 650° C. The present invention provides a high strength steel sheet having strengths of 340 MPa or more and having excellent stretch flanging performance, ductility, and shock resistance, providing a sufficient coil shape with good surface properties, even when hot dip zinc-coating is applied.

    摘要翻译: 高强度钢板本发明涉及一种高强度钢板,主要由以下组成的高强度钢板:基本上由Si:0.5〜0.1%,Si:0.5〜2%,Mn:0.05%以下,P:0.005%以下,O:0.005%以下,S: 平均铁素体晶粒尺寸为10μm以下,发生频率A为20mm / mm 2以下的发生频率A,将发生频率A定义为观察到的带状二相结构的总长度 每1mm 2钢板横截面沿其轧制方向。 钢板通过例如以下方法制造:包括以下步骤:在Ar 3相变点或更高的温度下直接或重新加热上述具有上述组成的连续铸造板坯 ; 并在200〜2000℃/秒的冷却速度下,在2秒钟内将热轧钢板冷却至600〜750℃的温度,然后将冷却后的钢板在450〜 650℃。本发明提供强度为340MPa以上且具有优异的拉伸凸缘性能,延展性和抗冲击性的高强度钢板,提供具有良好表面性能的足够的线圈形状,即使当热浸锌涂层 被申请;被应用。

    High strength cold rolled steel sheet and method for manufacturing the same
    5.
    发明申请
    High strength cold rolled steel sheet and method for manufacturing the same 审中-公开
    高强度冷轧钢板及其制造方法

    公开(公告)号:US20060037677A1

    公开(公告)日:2006-02-23

    申请号:US11050362

    申请日:2005-02-03

    IPC分类号: C21D8/00

    摘要: The present invention relates to a high strength cold rolled steel sheet consisting of 0.015% or less of C, 1.5% or less of Si, 0.4 to 3% of Mn, 0.15% or less of P, 0.02% or less of S, 0.1 to 1% of sol.Al, 0.01% or less of N, 0.2% or less of Ti, by mass %, and the balance of Fe and inevitable impurities. In this steel sheet, 1≦([Ti]/48)/([C]/12+[N]/14) is satisfied, in which [M] represents the content of the element M. Since having the superior deep drawability and the TS of 340 to 590 MPa, the high strength cold rolled steel sheet of the present invention is preferably used for automobiles parts difficult to be press formed, such as a side outer panel and a door inner panel.

    摘要翻译: 本发明涉及由C:0.015%以下,Si:1.5%以下,Mn:0.4〜3%,P:0.15%以下,S:0.02%以下的高强度冷轧钢板 至1%的Al,0.01%以下的N,0.2%以下的Ti,以质量%计,余量为Fe和不可避免的杂质。 在该钢板中,满足1 <=([Ti] / 48)/([C] / 12 + [N] / 14),其中[M]表示元素M的含量。 拉伸性和TS为340〜590MPa,本发明的高强度冷轧钢板优选用于难以压制成型的汽车零件,例如侧面板和门内板。