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1. 发明申请

WO2016020714A1 METHOD FOR PRODUCING A COATED STEEL SHEET HAVING IMPROVED STRENGTH, DUCTILITY AND FORMABILITY 审中-公开
标题翻译：生产具有改进的强度，密度和可伸缩性的涂层钢板的方法
公开(公告)号：WO2016020714A1
公开(公告)日：2016-02-11
申请号：PCT/IB2014/001492
申请日：2014-08-07
申请人： ARCELORMITTAL
发明人： MASSE, Jean-Philippe , HELL, Jean-Christophe
IPC分类号： C23C2/02 , C21D8/02 , C23C2/06 , C23C2/12 , C23C2/40 , C21D9/46 , C21D1/26 , C21D1/34 , C22C38/02 , C22C38/04 , C22C38/18
CPC分类号： C21D9/46 , B32B15/012 , B32B15/013 , C21D1/185 , C21D1/19 , C21D1/26 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/06 , C22C38/34 , C22C38/38 , C23C2/02 , C23C2/06 , C23C2/12 , C23C2/40 , C23F17/00 , C25D3/22 , C25D3/565
摘要： The invention relates to a method for producing a high strength coated steel sheet having a yield stress YS > 550 MPa, a tensile strength TS > 980 MPa, and improved formability and ductility. The steel contains:.15% ≤ C ≤ 0.25%, 1.2% ≤ Si ≤ 1.8%, 2% ≤ Mn ≤ 2.4%, 0.1 % ≤ Cr ≤ 0.25%,AI ≤ 0.5%, the balance being Fe and unavoidable impurities, The sheet is annealed at a temperature between TA1 = Ac3 - 0.45*(Ms - QT) and TA2 = 830°C for at least 30s then quenched by cooling it to a quenching temperature QT between 180°C and 300°C, then heated to a partitioning temperature PT between 380°C and 480°C and maintained at this temperature for a partitioning time Pt between 10 sec and 300 sec, then either hot dip coated and cooled to the room temperature, or cooled to the room temperature and further electro-galvanized. The steel according to the invention contains 5% to 25% of intercritical ferrite, at least 10% of residual austenite and at least 65% of martensite and bainite. It also relates to the obtained coated sheet.
摘要翻译：本发明涉及屈服应力YS> 550MPa，拉伸强度TS> 980MPa，成形性和延展性提高的高强度涂层钢板的制造方法。钢含有：0.15％≤C≤0.25％，1.2％≤Si≤1.8％，2％≤Mn≤2.4％，0.1％≤Cr≤0.25％，Al≤0.5％，余量为Fe和不可避免的杂质，将片材在TA1 = Ac3-0.45 *（Ms-QT）和TA2 = 830℃之间的温度下退火至少30秒，然后通过冷却至180℃至300℃的骤冷温度QT淬火，然后加热在380℃和480℃之间的分配温度PT，并在该温度下保持10秒至300秒之间的分隔时间Pt，然后热浸涂覆并冷却至室温，或冷却至室温，并进一步电镀锌。根据本发明的钢包含5％至25％的临界铁素体，至少10％的残余奥氏体和至少65％的马氏体和贝氏体。它还涉及所获得的涂布片。

2. 发明申请

WO2016020899A1 METHOD FOR PRODUCING A COATED STEEL SHEET HAVING IMPROVED STRENGTH, DUCTILITY AND FORMABILITY 审中-公开
标题翻译：生产具有改进的强度，密度和可伸缩性的涂层钢板的方法
公开(公告)号：WO2016020899A1
公开(公告)日：2016-02-11
申请号：PCT/IB2015/056029
申请日：2015-08-07
申请人： ARCELORMITTAL
发明人： MASSE, Jean-Philippe , HELL, Jean-Christophe
IPC分类号： C23C2/02 , C21D8/02 , C23C2/06 , C23C2/12 , C23C2/40 , C21D9/46 , C21D1/26 , C21D1/34 , C22C38/02 , C22C38/04 , C22C38/18
CPC分类号： C21D9/46 , B32B15/012 , B32B15/013 , C21D1/185 , C21D1/19 , C21D1/26 , C21D2211/001 , C21D2211/002 , C21D2211/005 , C21D2211/008 , C22C38/02 , C22C38/06 , C22C38/34 , C22C38/38 , C23C2/02 , C23C2/06 , C23C2/12 , C23C2/40 , C23F17/00 , C25D3/22 , C25D3/565
摘要： The invention relates to a method for producing a high strength coated steel sheet having a yield stress YS > 550 MPa, a tensile strength TS > 980 MPa, and improved formability and ductility. The steel contains: 0.15% ≤ C ≤ 0.25%, 1.2% ≤ Si ≤ 1.8%, 2% ≤ Mn ≤ 2.4%, 0.1% ≤ Cr ≤ 0.25%, Al ≤0.5%, the balance being Fe and unavoidable impurities. The sheet is annealed at a temperature between TA1 = Ac3 – 0.45*(Ms – QT) and TA2 = 830°C for at least 30s then quenched by cooling it to a quenching temperature QT between 180°C and 300°C, then heated to a partitioning temperature PT between 380°C and 480°C and maintained at this temperature for a partitioning time Pt between 0 sec and 300 sec, then either hot dip coated and cooled to the room temperature with a cooling rate of at least 25°C/s below 300°C, or directly cooled to the room temperature with a cooling rate of at least 25°C/s and further electro-galvanized, or cooled to the room temperature with a cooling rate of at least 25°C/s without coating. The steel according to the invention contains 5% to 25% of intercritical ferrite, at least 50% of partitioned martensite, at least 10% of residual austenite, less than 10% of fresh martensite, and bainite, the sum of partitioned martensite and bainite being at least 60%. It also relates to the obtained coated or non coated sheet.
摘要翻译：本发明涉及屈服应力YS> 550MPa，拉伸强度TS> 980MPa，成形性和延展性提高的高强度涂层钢板的制造方法。钢含有：0.15％≤C≤0.25％，1.2％≤Si≤1.8％，2％≤Mn≤2.4％，0.1％≤Cr≤0.25％，Al≤0.5％，余量为Fe和不可避免的杂质。将片材在TA1 = Ac3-0.45 *（Ms-QT）和TA2 = 830℃之间的温度下退火至少30秒，然后通过冷却至180℃至300℃的骤冷温度QT淬火，然后加热在380℃和480℃之间的分配温度PT，并在该温度下保持0秒和300秒之间的分隔时间Pt，然后热浸涂覆并冷却至室温，冷却速率至少为25度 C / s低于300℃，或以至少25℃/ s的冷却速度直接冷却至室温，并进一步电镀，或冷却至室温，冷却速率为至少25℃/ 没有涂层。根据本发明的钢包含5％至25％的临界铁素体，至少50％的分隔马氏体，至少10％的残余奥氏体，小于10％的新鲜马氏体和贝氏体，分离的马氏体和贝氏体的总和至少60％。它还涉及所获得的涂覆或未涂覆的片材。

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