DUAL-PHASE STEEL, FLAT PRODUCT MADE OF SUCH A DUAL-PHASE STEEL AND PROCESS FOR THE PRODUCTION OF A FLAT PRODUCT
    2.
    发明申请
    DUAL-PHASE STEEL, FLAT PRODUCT MADE OF SUCH A DUAL-PHASE STEEL AND PROCESS FOR THE PRODUCTION OF A FLAT PRODUCT 审中-公开
    双相钢,这种双相钢的平板产品和生产平板产品的方法

    公开(公告)号:US20110220252A1

    公开(公告)日:2011-09-15

    申请号:US12673279

    申请日:2008-08-07

    IPC分类号: C21D8/04 C22C38/22 B23P17/00

    摘要: A dual-phase steel, a flat product and processes for the production thereof. The dual-phase steel having a strength of at least 950 MPa, good deformability, and good surface finish. It is possible, when a simple production process is used, for the flat product produced from this steel to be formed into a complexly formed component, such as part of a car body, either uncoated or provided with an anti-corrosion coating. The steel according to the invention has a structure comprising 20-70% martensite, up to 8% retained austenite and the remainder ferrite and/or bainite and has the following composition (in % by weight): C: 0.050-0.105%, Si: 0.20-0.60%, Mn: 2.10-2.80%, Cr: 0.20-0.80%, Ti: 0.02-0.10%, B:

    摘要翻译: 双相钢,扁平产品及其制造方法。 具有至少950MPa的强度,良好的变形性和良好的表面光洁度的双相钢。 当使用简单的生产工艺时,对于由该钢制成的扁平产品可以形成复合形成的部件,例如未涂覆或设有防腐蚀涂层的汽车车体的一部分。 根据本发明的钢具有包括20-70%的马氏体,高达8%的残余奥氏体,其余为铁素体和/或贝氏体,并且具有以下组成(按重量%计):C:0.050-0.105%,Si :0.20-0.60%,Mn:2.10-2.80%,Cr:0.20-0.80%,Ti:0.02-0.10%,B:<0.0020%,Mo:<0.25%,Al:<0.10%,Cu: %,Ni:0.10%以下,Ca:0.005%以下,P:0.2%以下,S:0.01%以下,N:0.012%以下,余量为铁和不可避免的杂质。