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：US11344941B2

公开(公告)日：2022-05-31

申请号：US14233617

申请日：2012-07-18

申请人： Takayuki Yamano ,  Jiro Iwaya ,  Noriyuki Jimbo ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Takayuki Yamano ,  Jiro Iwaya ,  Noriyuki Jimbo ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： B21D22/02 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/28 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/50 ,  C22C38/54 ,  C22C38/30 ,  C21D1/673 ,  B21D22/20 ,  C22C38/58 ,  C21D8/02 ,  C22C38/32

摘要： In a method for obtaining a hot-press-formed steel member, a steel sheet containing 0.10-0.30 mass % of C, 1.0-2.5 mass % of Si, 1.0-3.0 mass % of Si and Al in total, and 1.5-3.0 mass % of Mn is heated at a heating temperature of not less than the Ac3 transformation point. The steel sheet is hot-press formed for one or more times. The starting temperature of the hot pressing is not more than the heating temperature but not less than the Ms point. The average cooling rate from (Ms point−150)° C. to 40° C. is 5° C./s or less. The hot-press-formed steel member has high strength, high tensile elongation, high bendability, excellent deformation characteristics at the time of collision crush, and excellent delayed fracture resistance.

公开(公告)号：US09463501B2

公开(公告)日：2016-10-11

申请号：US13995009

申请日：2012-01-12

申请人： Takayuki Yamano ,  Jiro Iwaya ,  Takayuki Kimura ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Takayuki Yamano ,  Jiro Iwaya ,  Takayuki Kimura ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： B21D22/20 ,  B21D22/24

CPC分类号： B21D22/20 ,  B21D22/208 ,  B21D22/24 ,  C21D1/673 ,  C22C38/02 ,  C22C38/04

摘要： A press forming method forming an extended part by extension in a later forming period after deep drawing, the deep drawing process carried out with working at 100-250° C., and the extension forming process carried out colder at less than 50° C., whereby the extended part is formed by extension in a cup shaped low parts formed by deep drawing. Thus, press forming products containing formed elements can be deep drawing formed and extension formed at a high forming rate of 10 mm/sec or greater, which can assure high productivity. By making a steel plate temperature 100-350° C. during press forming and by making the forming rate in the later forming period where extension forming is carried out slower than the forming rate in an earlier forming period where extension forming is not carried out, cracking of the extended part can be prevented and press forming limitations can be improved.

摘要翻译： 冲压成型方法在深拉深后的后续形成期间延伸形成延伸部分，深加工在100-250℃下进行，延伸成形工艺在低于50℃进行冷 由此延伸部分通过在深冲形成的杯形低部分中延伸形成。 因此，含有成形元件的冲压成形品可以以10mm /秒以上的高成形速度形成深拉深而成形，可确保高生产率。 通过在压制成形期间使钢板的温度为100-350℃，并且通过使延迟成形的后期成形时间的成形速度比在不进行拉伸成形的较早成形时段内的成形速度慢， 能够防止延长部的龟裂，能够提高冲压成形的限制。

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：US20130263637A1

公开(公告)日：2013-10-10

申请号：US13995009

申请日：2012-01-12

申请人： Takayuki Yamano ,  Jiro Iwaya ,  Takayuki Kimura ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Takayuki Yamano ,  Jiro Iwaya ,  Takayuki Kimura ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： B21D22/20

CPC分类号： B21D22/20 ,  B21D22/208 ,  B21D22/24 ,  C21D1/673 ,  C22C38/02 ,  C22C38/04

摘要： A press forming method forming an extended part by extension in a later forming period after deep drawing, the deep drawing process carried out with working at 100-250° C., and the extension forming process carried out colder at less than 50° C., whereby the extended part is formed by extension in a cup shaped low parts formed by deep drawing. Thus, press forming products containing formed elements can be deep drawing formed and extension formed at a high forming rate of 10 mm/sec or greater, which can assure high productivity. By making a steel plate temperature 100-350° C. during press forming and by making the forming rate in the later forming period where extension forming is carried out slower than the forming rate in an earlier forming period where extension forming is not carried out, cracking of the extended part can be prevented and press forming limitations can be improved.

摘要翻译： 冲压成型方法在深拉深后的后续形成期间延伸形成延伸部分，深加工在100-250℃下进行，延伸成形工艺在低于50℃进行冷 由此延伸部分通过在深冲形成的杯形低部分中延伸形成。 因此，含有成形元件的冲压成形品可以以10mm /秒以上的高成形速度形成深拉深而成形，可确保高生产率。 通过在压制成形期间使钢板的温度为100-350℃，并且通过使延迟成形的后期成形时间的成形速度比在不进行拉伸成形的较早成形时段内的成形速度慢， 能够防止延长部的龟裂，能够提高冲压成形的限制。

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：US20140144560A1

公开(公告)日：2014-05-29

申请号：US14233617

申请日：2012-07-18

申请人： Takayuki Yamano ,  Jiro Iwaya ,  Noriyuki JIMBO ,  Tatsuya Asai ,  Naoki Mizuta

发明人： Takayuki Yamano ,  Jiro Iwaya ,  Noriyuki JIMBO ,  Tatsuya Asai ,  Naoki Mizuta

IPC分类号： C22C38/58 ,  C21D8/02 ,  C22C38/54 ,  C22C38/50 ,  C22C38/42 ,  C22C38/38 ,  C22C38/34 ,  C22C38/32 ,  C22C38/28 ,  C22C38/14 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  B21D22/02

CPC分类号： B21D22/022 ,  B21D22/208 ,  C21D1/673 ,  C21D8/0247 ,  C21D2211/002 ,  C21D2211/008 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/14 ,  C22C38/28 ,  C22C38/30 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/50 ,  C22C38/54 ,  C22C38/58

摘要： To establish a method for obtaining a hot-press-formed steel member, which exhibits high strength, high tensile elongation (ductility) and high bendability, thereby having excellent deformation characteristics at the time of collision crush (crashworthiness), and which is capable of ensuring excellent delayed fracture resistance. A method for producing a hot-press-formed steel member by heating a steel sheet, which has a chemical component composition containing 0.10% (% by mass, and hereinafter the same shall apply) to 0.30% (inclusive) of C, 1.0% to 2.5% (inclusive) of Si, 1.0% to 3.0% (inclusive) of Si and Al in total and 1.5% to 3.0% (inclusive) of Mn, with the balance consisting of iron and unavoidable impurities, and hot press forming the steel sheet one or more times. The method for producing a hot-press-formed steel member is characterized in that: the heating temperature is set to not less than the Ac3 transformation point; the starting temperature of the hot pressing is set to not more than the heating temperature but not less than the Ms point; and the average cooling rate from (the Ms point−150° C. to 40° C. is set to 5° C./s or less.

摘要翻译： 为了建立具有高强度，高拉伸伸长率（延展性）和高弯曲性的热压成型钢构件的获得方法，由此在碰撞时具有优异的变形特性（耐碰撞性），并且能够 确保优异的延迟抗断裂性。 将具有0.10％（质量％以下，以下同样适用）的化学成分组成的钢板加热至0.30％（含）C，1.0％以上的钢板的制造方法， 至2.5％（含）的Si，1.0％〜3.0％（含）的Si和Al，以及1.5％〜3.0％（含）的Mn，余量由铁和不可避免的杂质构成，热压成型 钢板一次以上。 热压成型钢构件的制造方法的特征在于：将加热温度设定为不低于Ac 3相变点; 热压的起始温度设定为不高于加热温度，但不小于Ms点; 并且从（Ms点-150℃至40℃）的平均冷却速度设定为5℃/ s以下。

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。