公开(公告)号：US10400315B2

公开(公告)日：2019-09-03

申请号：US14901931

申请日：2014-07-03

Applicant: ArcelorMittal Investigación y Desarrollo SL

Inventor： Franco Del Frate ,  Jean-Michel Mataigne ,  Jonas Staudte ,  Astrid Perlade ,  Ian Alberto Zuazo-Rodriguez

IPC: C22C38/38 ,  C22C38/24 ,  C22C38/28 ,  C22C38/06 ,  C22C38/26 ,  C22C38/02 ,  C22C38/00 ,  C23C2/02 ,  C23C2/06 ,  C23C14/24 ,  C23C14/02 ,  C23C14/14 ,  C25D3/22 ,  C25D5/36 ,  C21D9/46 ,  C21D8/02 ,  C21D6/00 ,  B22D11/00 ,  C23C30/00 ,  C23C2/26 ,  C23C28/02 ,  C23C28/00 ,  C23C2/04 ,  C23C2/12 ,  C23C14/58 ,  B32B15/01 ,  B32B15/04 ,  C23C14/16 ,  C22C38/44 ,  C22C38/34 ,  C22C38/18 ,  C22C38/50 ,  C22C38/48 ,  C22C38/58 ,  C22C38/14 ,  C22C38/12 ,  C22C38/04 ,  C22C38/46 ,  B32B15/18 ,  C21D1/74 ,  C21D9/52 ,  C23C2/28 ,  C23C2/40

Abstract: A cold rolled and hot dip coated steel sheet presenting a tensile strength above 1000−50×Al MPa, a uniform elongation above 15% and a low density is provided. The steel includes, by weight percent: 0.1≤C≤0.5%, 3.5≤Mn≤10.0%, 0≤Al≤9.0%, Si≤5.0%, Ti≤0.2%, V≤0.2%, Nb≤0.2%, S≤0.004%, P≤0.025%, 0.5≤Si+Al≤9.0%, B≤0.0035, Cr≤1%, The balance being Fe and impurities and the microstructure containing 25% to 90% of ferrite, 10% to 50% of austenite, kappa precipitates lower than 5% and martensite lower than 25%. The steel is able to be coated using total oxidation.