公开(公告)号：US20130330226A1

公开(公告)日：2013-12-12

申请号：US14001819

申请日：2012-02-27

申请人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： C22C38/58 ,  C22C38/04 ,  C22C38/42 ,  C22C38/00 ,  C22C38/54 ,  C22C38/44 ,  C22C38/06 ,  C22C38/02

CPC分类号： C22C38/58 ,  C21D6/005 ,  C21D8/04 ,  C21D8/0426 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54

摘要： This high-strength steel sheet has a component composition containing, in mass %, 0.02 to 0.3% C, 1 to 3% Si, 1.8 to 3% Mn, 0.1% or less P, 0.01% or less S, 0.001 to 0.1% Al, and 0.002 to 0.03% N, the remainder being iron and impurities. The high-strength steel sheet has a structure containing, in terms of area ratio relative to the entire structure, each of the following phases: 50 to 85% bainitic ferrite; 3% or more retained austenite (γ); 10 to 45% martensite and the aforementioned retained austenite (γ); and 5 to 40% ferrite. The ratio between the Mn concentration (MnγR) in the retained austenite (γ) and the average Mn concentration (Mnav) in the entire structure is 1.2 or more (MnγR/ Mnav) based on the Mn concentration distribution obtained by means of EPMA line analysis. As a consequence, the high-strength steel sheet exhibits strength of 980 MPa or more and exerts excellent deep drawability.

摘要翻译： 该高强度钢板具有以质量％计含有C：0.02〜0.3％，Si：1〜3％，Mn：1.8〜3％，P：0.1％以下，S：0.01％以下，S：0.001〜0.1％ Al，0.002〜0.03％N，其余为铁和杂质。 高强度钢板的结构，相对于整个结构体的面积比，包含以下各相：50〜85％的贝氏体铁素体， 3％以上残余奥氏体（γ）; 10〜45％马氏体和上述残留奥氏体（γ）; 和5〜40％的铁素体。 基于通过EPMA线分析获得的Mn浓度分布，残留奥氏体（γ）中的Mn浓度（MngammaR）与整个结构中的平均Mn浓度（Mnav）之比为1.2以上（MngammaR / Mnav） 。 因此，高强度钢板的强度为980MPa以上，并且具有优异的深冲性。

公开(公告)号：US09657381B2

公开(公告)日：2017-05-23

申请号：US14238599

申请日：2012-08-15

申请人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Naoki Mizuta ,  Tatsuya Asai

发明人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Naoki Mizuta ,  Tatsuya Asai

IPC分类号： C22C38/00 ,  C22C38/38 ,  C21D8/02 ,  B21D22/20 ,  C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

CPC分类号： C22C38/38 ,  B21D22/208 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： This high-strength steel plate has a component composition including, by mass %, C: 0.02-0.3%, Si: 1-3%, Mn: 1.8-3%, P: 0.1% or less, S: 0.01% or less, Al: 0.001-0.1%, N: 0.002-0.03%, the rest consisting of iron and impurities. Said steel plate has a microstructure including, in terms of area ratio relative to the entire microstructure, each of the following phases: bainitic ferrite: 50-85%; retained γ: 3% or greater; martensite+the aforementioned retained γ: 10-45%; and ferrite: 5-40%. The C concentration (CγR) in the aforementioned retained austenite is 0.3-1.2 mass %, part or all of the N in the aforementioned component composition is solid solution N, and the amount of said solid solution N is 30-100 ppm.

公开(公告)号：US09194032B2

公开(公告)日：2015-11-24

申请号：US14001819

申请日：2012-02-27

申请人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/58 ,  C21D8/04 ,  C21D9/48 ,  C22C38/00 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54 ,  C21D6/00

CPC分类号： C22C38/58 ,  C21D6/005 ,  C21D8/04 ,  C21D8/0426 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/54

摘要： This high-strength steel sheet has a component composition containing, in mass %, 0.02 to 0.3% C, 1 to 3% Si, 1.8 to 3% Mn, 0.1% or less P, 0.01% or less S, 0.001 to 0.1% Al, and 0.002 to 0.03% N, the remainder being iron and impurities. The high-strength steel sheet has a structure containing, in terms of area ratio relative to the entire structure, each of the following phases: 50 to 85% bainitic ferrite; 3% or more retained austenite (γ); 10 to 45% martensite and the aforementioned retained austenite (γ); and 5 to 40% ferrite. The ratio between the Mn concentration (MnγR) in the retained austenite (γ) and the average Mn concentration (Mnav) in the entire structure is 1.2 or more (MnγR/ Mnav) based on the Mn concentration distribution obtained by means of EPMA line analysis. As a consequence, the high-strength steel sheet exhibits strength of 980 MPa or more and exerts excellent deep drawability.

摘要翻译： 该高强度钢板具有以质量％计含有C：0.02〜0.3％，Si：1〜3％，Mn：1.8〜3％，P：0.1％以下，S：0.01％以下，S：0.001〜0.1％ Al，0.002〜0.03％N，其余为铁和杂质。 高强度钢板的结构，相对于整个结构体的面积比，包含以下各相：50〜85％的贝氏体铁素体， 3％以上残余奥氏体（γ）; 10〜45％马氏体和上述残留奥氏体（γ）; 和5〜40％的铁素体。 基于通过EPMA线分析获得的Mn浓度分布，残留奥氏体（γ）中的Mn浓度（MnγR）与整个结构中的平均Mn浓度（Mnav）之比为1.2以上（MnγR/ Mnav） 。 因此，高强度钢板的强度为980MPa以上，并且具有优异的深冲性。

公开(公告)号：US10544489B2

公开(公告)日：2020-01-28

申请号：US13988382

申请日：2011-11-16

申请人： Elijah Kakiuchi ,  Toshio Murakami ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Elijah Kakiuchi ,  Toshio Murakami ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： C22C38/02 ,  C22C38/38 ,  C22C38/00 ,  C22C38/04 ,  C22C38/06 ,  B21D11/22 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： A high-strength steel sheet has a chemical composition including 0.05% to 0.3% of C, 1% to 3% of Si, 0.5% to 3% of Mn, 0% to 0.1% of P, 0.001% to 0.1% of Al, and 0.002% to 0.03% of N, in mass percent; further includes iron and impurities; and has a structure including 50% to 90% of bainitic ferrite, 5% to 20% of retained austenite (γR), a total of 10% to 50% of martensite and the retained austenite, and 0% to 40% of polygonal ferrite, in area percent based on the entire structure. The retained austenite has a carbon content (CγR) of 0.5% to 1.2% by mass, an average equivalent circle diameter of 0.2 to 2 μm, and an average aspect ratio (maximum diameter/minimum diameter) of less than 3.0. The high-strength steel sheet excels both in elongation and deep drawability while having a strength of 980 MPa or more.

公开(公告)号：US20130259734A1

公开(公告)日：2013-10-03

申请号：US13988210

申请日：2011-11-16

申请人： Elijah Kakiuchi ,  Toshio Murakami ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Elijah Kakiuchi ,  Toshio Murakami ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： C22C38/38 ,  C22C38/14 ,  C22C38/12 ,  B21D31/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/16 ,  C22C38/08

CPC分类号： C22C38/38 ,  B21D31/00 ,  B32B15/013 ,  C21D1/20 ,  C21D8/0236 ,  C21D8/0426 ,  C21D9/48 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： A high-strength steel sheet has a chemical composition including 0.05% to 0.3% of C, 1% to 3% of Si, 0.5% to 3% of Mn, 0% to 0.1% of P, 0% to 0.01% of S, 0.001% to 0.1% of Al, and 0.002% to 0.03% of N in mass percent; further includes iron and impurities; and has a structure including 50% to 90% of bainitic ferrite, 3% or more of retained austenite (γR), a total of 10% to 50% of martensite and the retained austenite, and 0% to 40% of polygonal ferrite in area percent based on the entire structure. The retained austenite has a carbon content (CγR) of 0.5% to 1.2% by mass. The steel sheet includes 0.3% or more of the retained austenite that is surrounded by martensite. The high-strength steel sheet has a strength of 980 MPa or more and exhibits better ductility.

摘要翻译： 高强度钢板具有C：0.05〜0.3％，Si：1〜3％，Mn：0.5〜3％，P：0〜0.1％，S：0〜0.01％ ，Al：0.001〜0.1％，N：0.002〜0.03％。 进一步包括铁和杂质; 并且具有包括50％至90％的贝氏体铁素体，3％或更多的残留奥氏体（γR），总共10％至5​​0％的马氏体和残余奥氏体以及0％至40％的多边形铁素体 基于整个结构的面积百分比。 残留奥氏体的碳含量（CgammaR）为0.5〜1.2质量％。 钢板包含由马氏体包围的0.3％以上的残留奥氏体。 高强度钢板的强度为980MPa以上，展现出更好的延展性。

公开(公告)号：US20140271331A1

公开(公告)日：2014-09-18

申请号：US14238599

申请日：2012-08-15

申请人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Naoki Mizuta ,  Tatsuya Asai

发明人： Toshio Murakami ,  Elijah Kakiuchi ,  Hideo Hata ,  Naoki Mizuta ,  Tatsuya Asai

IPC分类号： C22C38/38 ,  C22C38/14 ,  C22C38/12 ,  C22C38/00 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/16 ,  C22C38/08

CPC分类号： C22C38/38 ,  B21D22/208 ,  C21D8/0226 ,  C21D8/0236 ,  C21D9/46 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16

摘要： This high-strength steel plate has a component composition including, by mass %, C: 0.02-0.3%, Si: 1-3%, Mn: 1.8-3%, P: 0.1% or less, S: 0.01% or less, Al: 0.001-0.1%, N: 0.002-0.03%, the rest consisting of iron and impurities. Said steel plate has a microstructure including, in terms of area ratio relative to the entire microstructure, each of the following phases: bainitic ferrite: 50-85%; retained γ; 3% or greater; martensite+the aforementioned retained γ; 10-45%; and ferrite: 5-40%. The C concentration (CγR) in the aforementioned retained austenite is 0.3-1.2 mass %, part or all of the N in the aforementioned component composition is solid solution N, and the amount of said solid solution N is 30-100 ppm.

摘要翻译： 该高强度钢板的组成成分按质量％计含有C：0.02-0.3％，Si：1-3％，Mn：1.8-3％，P：0.1％以下，S：0.01％以下 ，Al：0.001-0.1％，N：0.002-0.03％，其余由铁和杂质组成。 所述钢板具有包括相对于整个微观结构的面积比的以下各相的微结构：贝氏体铁素体：50-85％; 保留γ; 3％以上; 马氏体+上述保留的γ; 10-45％; 铁素体：5-40％。 上述残留奥氏体中的C浓度（CγR）为0.3〜1.2质量％，上述成分组成中的N的一部分或全部为固溶N，所述固溶N的量为30〜100ppm。

公开(公告)号：US20130236350A1

公开(公告)日：2013-09-12

申请号：US13988382

申请日：2011-11-16

申请人： Elijah Kakiuchi ,  Toshio Murakami ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Elijah Kakiuchi ,  Toshio Murakami ,  Hideo Hata ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： C22C38/38 ,  C22C38/14 ,  C22C38/12 ,  B21D11/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C22C38/16 ,  C22C38/08

摘要： A high-strength steel sheet has a chemical composition including 0.05% to 0.3% of C, 1% to 3% of Si, 0.5% to 3% of Mn, 0% to 0.1% of P, 0.001% to 0.1% of Al, and 0.002% to 0.03% of N, in mass percent; further includes iron and impurities; and has a structure including 50% to 90% of bainitic ferrite, 5% to 20% of retained austenite (γR), a total of 10% to 50% of martensite and the retained austenite, and 0% to 40% of polygonal ferrite, in area percent based on the entire structure. The retained austenite has a carbon content (CγR) of 0.5% to 1.2% by mass, an average equivalent circle diameter of 0.2 to 2 μm, and an average aspect ratio (maximum diameter/minimum diameter) of less than 3.0. The high-strength steel sheet excels both in elongation and deep drawability while having a strength of 980 MPa or more.

摘要翻译： 高强度钢板具有C：0.05〜0.3％，Si：1〜3％，Mn：0.5〜3％，P：0〜0.1％，Al：0.001〜0.1％ ，以质量％计，N：0.002〜0.03％ 进一步包括铁和杂质; 并且具有包括50％至90％的贝氏体铁素体，5％至20％的残留奥氏体（γR），总共10％至5​​0％的马氏体和残余奥氏体以及0％至40％的多边形铁素体 ，占整个结构的面积百分比。 残留奥氏体的碳含量（CgammaR）为0.5〜1.2质量％，平均当量圆直径为0.2〜2μm，平均纵横比（最大直径/最小直径）小于3.0。 高强度钢板的强度为980MPa以上，伸长率和深冲性均优异。

公开(公告)号：US20130022490A1

公开(公告)日：2013-01-24

申请号：US13634614

申请日：2011-03-22

申请人： Hideo Hata ,  Toshio Murakami ,  Yukihiro Utsumi

发明人： Hideo Hata ,  Toshio Murakami ,  Yukihiro Utsumi

IPC分类号： C22C38/06 ,  C22C38/04 ,  C22C38/38 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/02 ,  C22C38/08

CPC分类号： C21D8/0226 ,  C21D1/20 ,  C21D8/0447 ,  C21D8/0463 ,  C21D8/0473 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/38

摘要： Disclosed is a high-strength steel plate with excellent warm workability that has a component composition comprising, in mass %, 0.05 to 0.4% C, 0.5 to 3% Si+Al, 0.5 to 3% Mn, no more than 0.15% P (not including 0%), and no more than 0.02% S (including 0%), with the remainder comprising iron and impurities, and a composition that includes a total of 45 to 80% martensite and/or bainitic ferrite in terms of the area ratio relative to the entire composition, 5 to 40% polygonal ferrite in terms of the area ratio relative to the entire composition, and 5 to 20% retained austenite in terms of the area ratio relative to the entire composition, wherein the C concentration (CγR) within said residual austenite is in the range of 0.6 mass % to less than 1.0 mass %, and that furthermore may include bainite. In the high-strength steel plate, TRIP effects are achieved to the fullest extent in warm working, and increased ductility over prior steel plates is reliably achieved.

摘要翻译： 公开了一种具有优异的温加工性的高强度钢板，其具有以质量％计含有0.05〜0.4％的C，0.5〜3％的Si + Al，0.5〜3％的Mn，0.15％以下的P（ 不包括0％）和不超过0.02％的S（包括0％），剩余部分包括铁和杂质，以及包括总共45-80％的马氏体和/或贝氏体铁素体的组合物的面积 相对于整个组合物的比率，相对于组合物的面积比为5〜40％的多边形铁素体，相对于组合物的面积比为5〜20％的残留奥氏体，其中C浓度 ）在0.6质量％以下且小于1.0质量％的范围内，并且还可以包括贝氏体。 在高强度钢板中，TRIP效果在温暖加工中达到最大程度，并且可靠地实现了比现有钢板更高的延展性。

公开(公告)号：US20100252147A1

公开(公告)日：2010-10-07

申请号：US12742323

申请日：2008-11-20

申请人： Toshio Murakami ,  Hideo Hata ,  Akira Ibano ,  Kenji Saito

发明人： Toshio Murakami ,  Hideo Hata ,  Akira Ibano ,  Kenji Saito

IPC分类号： C22C38/22 ,  C22C38/00 ,  C22C38/04 ,  C22C38/16 ,  C22C38/18 ,  C22C38/08

CPC分类号： C22C38/02 ,  C21D8/0405 ,  C21D8/0447 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06

摘要： The invention provides a high-strength cold-rolled steel sheet which is improved in elongation and stretch-flangeability and exhibits more excellent formability. The high-strength cold-rolled steel sheet has a composition which contains by mass C: 0.03 to 0.30%, Si: 0.1 to 3.0%, Mn: 0.1 to 5.0%, P: 0.1% or below, S: 0.005% or below, N: 0.01% or below, and Al: 0.01 to 1.00% with the balance consisting of iron and unavoidable impurities. The high-strength cold-rolled steel sheet has a structure which comprises at least 40% (up to 100% inclusive) in terms of area fraction of tempered martensite having a hardness of 300 to 380 Hv and the balance ferrite. The cementite particles in the tempered martensite take such dispersion that 10 or more cementite particles having equivalent-circle diameters of 0.02 to less than 0.1 μm are present per one μm2 of the tempered martensite and three or fewer cementite particles having equivalent-circle diameters of 0.1 μm or above are present per one μm2 of the tempered martensite.

摘要翻译： 本发明提供了一种提高伸长率和拉伸凸缘性的高强度冷轧钢板，并且具有更优异的成形性。 高强度冷轧钢板的组成为C：0.03〜0.30％，Si：0.1〜3.0％，Mn：0.1〜5.0％，P：0.1％以下，S：0.005％以下 ，N：0.01％以下，Al：0.01〜1.00％，余量由铁和不可避免的杂质构成。 高强度冷轧钢板具有以硬度为300〜380Hv的回火马氏体的面积率和平衡铁素体为至少40％（含有100％以上）的结构。 回火马氏体中的渗碳体颗粒采用这样的分散体，每1μm回火马氏体和三个或更少个当量圆直径为0.1的渗碳体颗粒存在10个或更多个当量圆直径为0.02至小于0.1μm的渗碳体颗粒 每1μm2的回火马氏体存在1μm以上。

公开(公告)号：US08840738B2

公开(公告)日：2014-09-23

申请号：US13258823

申请日：2010-04-02

申请人： Toshio Murakami ,  Akira Ibano ,  Hideo Hata ,  Kenji Saito

发明人： Toshio Murakami ,  Akira Ibano ,  Hideo Hata ,  Kenji Saito

IPC分类号： C21D11/00 ,  C22C1/00 ,  C21D9/48 ,  C21D9/46 ,  C21D8/04 ,  C22C38/00 ,  C22C38/04 ,  C22C38/22 ,  C22C38/44

CPC分类号： C21D8/0405 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/001 ,  C21D2211/003 ,  C21D2211/005 ,  C21D2211/008 ,  C22C1/002

摘要： A cold-rolled steel sheet of the present invention which has a composition containing, in terms of % by mass, C: 0.05-0.30%, Si: 3.0% or less (including 0%), Mn: 0.1-5.0%, P: 0.1% or less (including 0%), S: 0.010% or less (including 0%), and Al: 0.001-0.10%, and remainder being mainly iron, and which has a structure comprising, in terms of area ratio, 10-80% ferrite, less than 5% (including 0%) of the sum of retained austenite and martensite, and a hard phase as the remainder. The steel sheet gives a KAM value frequency distribution curve in which the relationship between the proportion of frequency having a KAM value ≦0.4, XKAM≦0.4°, and the area ratio of ferrite, Vα satisfies XKAM≦0.4°/Vα≧0.8 and the proportion of frequency having a KAM value in the range of 0.6-0.8, XKAM=0.6-0.8° is 10-20%. In the hard phase adjoining the ferrite, cementite, grains having an equivalent circle diameter of 0.1 μm or larger exist so that three or less such cementite grains are dispersed per μm2 of the hard phase. The steel sheet has improved balance between elongation and stretch flangeability and has better formability.

摘要翻译： 本发明的冷轧钢板，其组成为以质量％计含有C：0.05〜0.30％，Si：3.0％以下（含0％），Mn：0.1-5.0％，P ：0.1％以下（包括0％），S：0.010％以下（包括0％），Al：0.001-0.10％，余量主要为铁，其结构为面积比， 10-80％的铁素体，小于残留奥氏体和马氏体之和的5％（包括0％），剩余部分为硬质相。 钢板给出KAM值频率分布曲线，其中具有KAM值＆lt; lE; 0.4，XKAM＆nlE; 0.4°的频率的比例与铁素体的面积比Vα之间的关系满足XKAM＆nlE; 0.4°/Vα≥0.8，以及 KAM值在0.6-0.8，XKAM = 0.6-0.8°范围内的频率比例为10-20％。 在与铁素体相邻的硬相中，存在具有当量圆直径为0.1μm以上的渗碳体，每μm2硬相分散3个以下的渗碳体粒子。 钢板具有提高伸长率和拉伸凸缘性之间的平衡，并且具有更好的成形性。