EP3167092B1 STEEL STRIP HAVING HIGH STRENGTH AND HIGH FORMABILITY, THE STEEL STRIP HAVING A HOT DIP ZINC BASED COATING
有权
基本信息:
- 专利标题： STEEL STRIP HAVING HIGH STRENGTH AND HIGH FORMABILITY, THE STEEL STRIP HAVING A HOT DIP ZINC BASED COATING
- 专利标题（中）：具有高强度和高成形性的钢带，具有热镀锌基涂层的钢带
- 申请号：EP15797015.3 申请日：2015-07-06
- 公开(公告)号：EP3167092B1 公开(公告)日：2018-03-28
- 发明人： HANLON, David Neal , ZUIJDERWIJK, Marga Josina , VAN BOHEMEN, Stefanus Matheus Cornelis
- 申请人： Tata Steel IJmuiden BV
- 申请人地址： Wenckebachstraat 1 1951 JZ Velsen-Noord NL
- 专利权人： Tata Steel IJmuiden BV
- 当前专利权人： Tata Steel IJmuiden BV
- 当前专利权人地址： Wenckebachstraat 1 1951 JZ Velsen-Noord NL
- 代理机构： Kruit, Jan
- 优先权： EP14176008 20140707
- 国际公布： WO2016005061 20160114
- 主分类号： C23C2/02
- IPC分类号： C23C2/02 ; C22C38/02 ; C22C38/06 ; C21D9/46 ; C23C2/06 ; C23C2/40 ; C22C18/00 ; C22C38/04 ; C22C38/38
摘要：
The invention relates to a steel strip having a hot dip zinc based coating, the steel strip having the following composition, in weight%,: C: 0.17 - 0.24 Mn:. 1.8 - 2.5 Si: 0.65 - 1.25 Al: ≤ 0.3 optionally: Nb: ≤ 0.1 and/or V: ≤ 0.3 and/or Ti: ≤ 0.15 and/or Cr: ≤ 0.5 and/or Mo: ≤ 0.3, the remainder being iron and unavoidable impurities, with a Si/Mn ratio ≤ 0.5 and a Si/C ratio ≥ 3.0, with an Mn equivalent ME of at most 3.5, wherein ME = Mn + Cr + 2 Mo (in wt.%) having a microstructure with (in vol.%): ferrite: 0 - 40 bainite: 20 - 70 martensite: 7 - 30 retained austenite: 5 - 20 pearlite: ≤ 2 cementite: ≤ 1 having a tensile strength in the range of 960 - 1100 MPa, a yield strength of at least 500 MPa, and a uniform elongation of at least 12%.