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公开(公告)号：US09657380B2
公开(公告)日：2017-05-23
申请号：US14395929
申请日：2012-04-26
申请人： Noriaki Kosaka , Kazuhiro Seto , Hidetaka Kawabe
发明人： Noriaki Kosaka , Kazuhiro Seto , Hidetaka Kawabe
CPC分类号： C22C38/14 , B32B15/013 , C21D8/0263 , C21D8/04 , C21D8/0426 , C21D8/0463 , C21D9/46 , C21D2211/004 , C21D2211/005 , C22C18/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A slab has a steel composition including 0.020% to 0.065% of C, 0.1% or less of Si, 0.40% to less than 0.80% of Mn, 0.030% or less of P, 0.005% or less of S, 0.08% to 0.16% of Ti, 0.005% to 0.1% of Al, 0.005% or less of N, and the balance being Fe and incidental impurities, in which Ti*(=Ti−(48/14)×N) satisfies [Ti*≧0.08] and [0.300≦C/Ti*≦0.375], is subjected to hot rolling to obtain a hot-rolled steel sheet in which the steel microstructure includes, in terms of area fraction, 95% or more of a ferrite phase; the average ferrite grain size is 10 μm or less; the average grain size of Ti carbides precipitated in steel is 10 nm or less; and Ti in the amount of 80% or more of Ti* is precipitated as Ti carbides.
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2.发明申请公开(公告)号：US20150101717A1
公开(公告)日：2015-04-16
申请号：US14395929
申请日：2012-04-26
申请人： Noriaki Kosaka , Kazuhiro Seto , Hidetaka Kawabe
发明人： Noriaki Kosaka , Kazuhiro Seto , Hidetaka Kawabe
CPC分类号： C22C38/14 , B32B15/013 , C21D8/0263 , C21D8/04 , C21D8/0426 , C21D8/0463 , C21D9/46 , C21D2211/004 , C21D2211/005 , C22C18/00 , C22C38/001 , C22C38/02 , C22C38/04 , C22C38/06
摘要： A slab has a steel composition including 0.020% to 0.065% of C, 0.1% or less of Si, 0.40% to less than 0.80% of Mn, 0.030% or less of P, 0.005% or less of S, 0.08% to 0.16% of Ti, 0.005% to 0.1% of Al, 0.005% or less of N, and the balance being Fe and incidental impurities, in which Ti*(=Ti−(48/14)×N) satisfies [Ti*≧0.08] and [0.300≦C/Ti*≦0.375], is subjected to hot rolling to obtain a hot-rolled steel sheet in which the steel microstructure includes, in terms of area fraction, 95% or more of a ferrite phase; the average ferrite grain size is 10 μm or less; the average grain size of Ti carbides precipitated in steel is 10 nm or less; and Ti in the amount of 80% or more of Ti* is precipitated as Ti carbides.
摘要翻译： 钢坯的组成为：C：0.020〜0.065％，Si：0.1％以下，Si：0.40％〜0.80％，P：0.030％以下，S：0.005％以下，S：0.08〜0.16 Ti = 0.005％〜0.1％，N为0.005％以下，余量为Ti *（= Ti-（48/14）×N）为Fe [Ti *≥0.08] ]和[0.300＆nlE; C / Ti *＆nlE; 0.375]进行热轧，得到其中钢组织包含面积率为95％以上的铁素体相的热轧钢板; 平均铁素体晶粒尺寸为10μm以下; 钢中析出的Ti碳化物的平均粒径为10nm以下; Ti的含量为80％以上的Ti作为Ti碳化物析出。
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3.发明申请公开(公告)号：US20140141280A1
公开(公告)日：2014-05-22
申请号：US14131824
申请日：2012-07-11
CPC分类号： C21D8/0263 , B21B1/026 , C21D6/005 , C21D9/46 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/12 , C22C38/14 , Y10T428/12799
摘要： Provided is a high-strength steel sheet having good warm press formability and excellent strength and ductility after warm press forming, and a method for manufacturing such. The high-strength steel sheet has a tensile strength at room temperature not less than 780 MPa, a yield stress at a heating temperature range of 400° C. to 700° C. not more than 80% of the yield stress at room temperature, total elongation at the heating temperature range not less than 1.1 times the total elongation at room temperature, yield stress and total elongation after the steel sheet is heated to the heating temperature range, subjected to a strain of not more than 20%, and cooled from the heating temperature to room temperature, not less than 70% of the yield stress and total elongation, respectively, at room temperature before the heating.
摘要翻译： 本发明提供一种具有良好的热压成型性和在热压成型后具有优异的强度和延展性的高强度钢板及其制造方法。 高强度钢板在室温下的拉伸强度不低于780MPa，加热温度范围为400〜700℃的屈服应力，室温下屈服应力的80％以下， 在加热温度范围内的总伸长率不小于室温总伸长率的1.1倍，钢板被加热至加热温度范围后的屈服应力和总伸长率，经受不大于20％的应变，并从 加热温度至室温，分别在加热前的室温下分别不低于屈服应力和总伸长率的70％。
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