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1. 发明授权

US09708679B2 High-strength hot-dip galvanized steel sheet and high-strength alloyed hot-dip galvanized steel sheet excellent in mechanical cutting property, and manufacturing method thereof 有权
公开(公告)号：US09708679B2
公开(公告)日：2017-07-18
申请号：US14348502
申请日：2012-09-28
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Hiroyuki Ban , Kaoru Hiramatsu
IPC分类号： C23C2/02 , C21D8/02 , C23C2/06 , C23C2/28 , C21D9/46 , C22C18/04 , C22C38/00 , C22C38/06 , C22C38/58 , B32B15/01 , C22C38/02 , C22C38/04
CPC分类号： C21D8/0263 , B32B15/013 , C21D8/0226 , C21D8/0236 , C21D8/0278 , C21D9/46 , C21D2211/001 , C21D2211/005 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/28 , Y10T428/12799
摘要： There is provided a high-strength hot-dip galvanized steel sheet and the like excellent in mechanical cutting property, which are capable of obtaining high ductility while ensuring high strength with maximum tensile strength of 900 MPa or more. The high-strength hot-dip galvanized steel sheet has a sheet thickness of 0.6 to 5.0 mm and has a plating layer on a surface of a steel sheet with component compositions being set in appropriate ranges, in which the steel sheet structure contains a 40 to 90% ferrite phase and a 3% or more retained austenite phase by volume fraction. In the retained austenite phase, a solid solution carbon amount is 0.70 to 1.00%, an average grain diameter is 2.0 μm or less, an average distance between grains is 0.1 to 5.0 μm, a thickness of a decarburized layer in a steel sheet surface layer portion is 0.01 to 10.0 μm, an average grain diameter of oxides contained in the steel, sheet surface layer portion is 30 to 120 nm and an average density thereof is 1.0×1012 oxides/m2 or more, and moreover, a work hardening coefficient (n value) during a 3 to 7% plastic deformation is 0.080 or more on average.

2. 发明授权

US10697486B2 Laser welded joint, vehicle component, manufacturing method of laser welded joint, and manufacturing method of vehicle component 有权
公开(公告)号：US10697486B2
公开(公告)日：2020-06-30
申请号：US15523874
申请日：2015-11-19
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Naoki Maruyama , Yasuaki Naito , Shigeru Yonemura , Yasunobu Miyazaki , Takuya Kuwayama
IPC分类号： F16B5/08 , C22C38/00 , C22C38/58 , B23K26/21 , C21D9/50 , B23K35/02 , C22C38/12 , C22C38/54 , C22C38/18 , C22C38/38 , C22C38/42 , C22C38/04 , B23K35/30 , C22C38/02 , C22C38/16 , C22C38/06 , C22C38/46 , C22C38/14 , C22C38/08 , C22C38/50 , C22C38/44 , C22C38/48 , B21D22/02 , B21D53/88 , B23K26/26 , B23K101/00 , B23K103/08
摘要： A laser welded joint has weld metal provided between a plurality of steel sheets. A chemical composition of the weld metal has predetermined components, and average hardness of the weld metal is 350 to 540 in Vickers hardness. In the weld metal, distribution density of porosities having a diameter of 2 μm to 50 μm is equal to or less than 5.0 pieces/mm2. In the weld metal, distribution density of oxide inclusions having a diameter of 3 μm or more is 0.1 to 8.0 pieces/mm2.

3. 发明授权

US08993120B2 High-strength hot-dip galvanized steel sheet having excellent delayed fracture resistance and manufacturing method thereof 有权
$High-strength hot-dip galvanized steel sheet having excellent delayed fracture resistance and manufacturing method thereof$
标题翻译：具有优异的耐延迟断裂性的高强度热浸镀锌钢板及其制造方法
公开(公告)号：US08993120B2
公开(公告)日：2015-03-31
申请号：US14348335
申请日：2012-09-28
申请人： Nippon Steel & Sumitomo Metal Corporation
发明人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Hiroyuki Ban , Kaoru Hiramatsu
IPC分类号： B32B15/00 , B32B15/04 , B32B15/18 , C23C2/02 , C21D9/46 , B21B1/26 , B21B3/00 , C23C2/06 , C23C2/28 , C22C18/04 , C22C38/00 , C22C38/06 , C22C38/58 , B32B15/01 , C22C38/02 , C22C38/04 , C23C2/26 , C23C2/40
CPC分类号： C23C2/02 , B21B1/26 , B21B3/00 , B32B15/013 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1277 , C21D9/46 , C21D2211/005 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/58 , C23C2/06 , C23C2/26 , C23C2/28 , C23C2/40 , Y10T428/12618 , Y10T428/12799 , Y10T428/12972 , Y10T428/265
摘要： A hot-dip galvanizing layer or an alloyed hot dip galvanizing layer is formed on the surface of a base steel sheet in which in volume fraction, 40 to 90% of a ferrite phase and 5% or less of a retained austenite phase are contained, and a ratio of non-recrystallized ferrite to the entire ferrite phase is 50% or less in volume fraction, and further a grain diameter ratio being a value of, of crystal grains in the ferrite phase, an average grain diameter in the rolling direction divided by an average grain diameter in the sheet width direction is 0.75 to 1.33, a length ratio being a value of, of hard structures dispersed in island shapes, an average length in the rolling direction divided by an average length in the sheet width direction is 0.75 to 1.33, and an average aspect ratio of inclusions is 5.0 or less.
摘要翻译：在基体钢板的表面形成有热浸镀锌层或合金化热镀锌层，其中体积分数为40〜90％的铁素体相和5％以下的残留奥氏体相，未再结晶的铁素体与铁素体相的整体的比例在体积分率中为50％以下，另外，晶粒直径比为铁素体相中的晶粒的值，轧制方向的平均粒径分割通过片宽度方向上的平均粒径为0.75〜1.33，长度比为分散为岛状的硬结构的长度比，轧制方向的平均长度除以片宽方向的平均长度为0.75 至1.33，夹杂物的平均纵横比为5.0以下。

4. 发明授权

US08932729B2 High-strength hot-dip galvanized steel sheet excellent in impact resistance property and high-strength alloyed hot-dip galvanized steel sheet 有权
标题翻译：耐冲击性优异的高强度热浸镀锌钢板和高强度合金化热浸镀锌钢板
公开(公告)号：US08932729B2
公开(公告)日：2015-01-13
申请号：US14348526
申请日：2012-09-28
申请人： Nippon Steel & Sumitomo Metal Corporation
发明人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Hiroyuki Ban , Kaoru Hiramatsu
IPC分类号： B32B15/00 , B32B15/04 , B32B15/18 , C23C2/02 , B21B1/26 , B21B3/00 , C23C2/06 , C23C2/28 , C22C18/04 , C22C38/00 , C22C38/06 , C22C38/58 , B32B15/01 , C21D8/02 , C22C38/02 , C22C38/04 , C21D9/46
CPC分类号： C23C2/02 , B21B1/26 , B21B3/00 , B32B15/013 , C21D1/26 , C21D1/72 , C21D8/0257 , C21D8/0263 , C21D8/0278 , C21D8/0284 , C21D9/46 , C21D2211/002 , C21D2211/008 , C21D2251/02 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/005 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/08 , C22C38/12 , C22C38/14 , C22C38/16 , C22C38/18 , C22C38/58 , C23C2/06 , C23C2/12 , C23C2/28 , Y10T428/12618 , Y10T428/12799 , Y10T428/12972 , Y10T428/265
摘要： A base steel sheet has a hot-dip galvanized layer formed on a surface thereof, in which, in a steel sheet structure in a range of ⅛ thickness to ⅜ thickness centered around ¼ thickness of a sheet thickness from a surface, a volume fraction of a retained austenite phase is 5% or less, and a total volume fraction of phases of bainite, bainitic ferrite, fresh martensite, and tempered martensite is 40% or more, an average effective crystal grain diameter is 5.0 μm or less, a maximum effective crystal grain diameter is 20 μm or less, and a decarburized layer with a thickness of 0.01 μm to 10.0 μm is formed on a surface layer portion, in which a density of oxides dispersed in the decarburized layer is 1.0×1012 to 1.0×1016 oxides/m2, and an average grain diameter of the oxides is 500 nm or less.
摘要翻译：基材钢板的表面形成有热浸镀锌层，其中，以从板表面厚度的1/4厚度到厚度的厚度至⅜厚度的钢板结构体的体积分数残留奥氏体相为5％以下，贝氏体，贝氏体铁素体，新鲜马氏体和回火马氏体相的总体积分数为40％以上，平均有效晶粒直径为5.0μm以下，最大有效晶粒直径为20μm以下，分散在脱碳层中的氧化物的密度为1.0×10 12〜1.0×10 16个氧化物的表层部形成厚度为0.01μm〜10.0μm的脱碳层 / m 2，氧化物的平均粒径为500nm以下。

5. 发明授权

US09874504B2 Metal sheet bending fracture determination method and recording medium 有权
$Metal sheet bending fracture determination method and recording medium$
公开(公告)号：US09874504B2
公开(公告)日：2018-01-23
申请号：US14897057
申请日：2014-06-26
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Shigeru Yonemura , Takuya Kuwayama , Akihiro Uenishi , Toshiyuki Niwa
IPC分类号： G01N3/20 , G06F17/50
CPC分类号： G01N3/20 , G01N2203/0212 , G01N2203/0214 , G06F17/5009 , G06F17/5018 , G06F2217/16 , G06F2217/42
摘要： A bending fracture limit stress is calculated for each of (bend radius at sheet thickness center of a metal sheet)/(initial sheet thickness of the metal sheet); a fracture limit curve and a fracture limit stress are calculated from work hardening characteristics; a fracture limit curve corresponding to (the metal sheet bend radius at sheet thickness center)/(the initial sheet thickness of the metal sheet) is calculated; a corresponding fracture limit stress is calculated from stress of the element subject to determination and the fracture limit curve; a risk ratio that is a ratio between the stress of the element subject to determination and the fracture limit stress is computed; and performing fracture determination for the element subject to determination based on the risk ratio.

6. 发明申请

US20140234660A1 HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET, HIGH-STRENGTH ALLOYED HOT-DIP GALVANIZED STEEL SHEET EXCELLENT IN BAKE HARDENABILITY, AND MANUFACTURING METHOD THEREOF 有权
标题翻译：高强度热镀锌钢板，高强度合金热镀锌钢板优良的耐烧蚀性及其制造方法
公开(公告)号：US20140234660A1
公开(公告)日：2014-08-21
申请号：US14348536
申请日：2012-09-28
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Hiroyuki Ban , Kaoru Hiramatsu
IPC分类号： B32B15/01 , C23C2/02
CPC分类号： B32B15/013 , B21B1/22 , B21B1/26 , B21B3/00 , B21B2001/225 , B21B2001/228 , C21D9/00 , C21D9/46 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/26 , C23C2/28 , C23C2/40 , C23C30/005 , Y10T428/12618 , Y10T428/12799 , Y10T428/12965 , Y10T428/12972 , Y10T428/2495 , Y10T428/24967 , Y10T428/264 , Y10T428/265
摘要： Steel contains each of C, Si, Mn, P, S, Al, N, O, at a range from ⅛ thickness centered around a ¼ sheet thickness from a surface to ⅜ thickness centered around the ¼ sheet thickness from the surface at a base steel sheet, a structure of the base steel sheet contains, in volume fraction, 3% or more of a retained austenite phase, 50% or less of a ferrite phase, and 40% or more of a hard phase, average dislocation density is 5×1013/m2 or more, solid-solution C amount contained in the retained austenite phase is in mass % 0.70 to 1.00%, X-ray random intensity ratio of FCC iron in an texture of the retained austenite phase is 3.0 or less, ratio between a grain diameter relative to a rolling direction and a grain diameter relative to a sheet width direction of the retained austenite phase is 0.75 to 1.33.
摘要翻译：钢包含C，Si，Mn，P，S，Al，N，O中的每一个，以⅛厚度为中心的⅛厚度范围，从¼厚度从表面到⅜厚度以¼厚度为中心从基底的表面钢板，基体钢板的结构体积分数为3％以上的残余奥氏体相，50％以下的铁素体相和40％以上的硬质相，平均位错密度为5 ×10 13 / m 2以上时，残存奥氏体相中所含的固溶C含量在质量％为0.70〜1.00％之间，FCC铁在残余奥氏体相的组织中的X射线随机强度比为3.0以下在相对于轧制方向的粒径和相对于残留奥氏体相的片材宽度方向的粒径之间为0.75〜1.33。

7. 发明授权

US10713401B2 Surface shape defect generating region estimating method, surface shape defect source region estimating method, surface shape defect generating region estimating device, surface shape defect source region estimating device, program, and recording medium 有权
公开(公告)号：US10713401B2
公开(公告)日：2020-07-14
申请号：US15537956
申请日：2016-01-22
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Takuya Kuwayama , Takashi Ariga
IPC分类号： G06F30/23 , B21D22/00 , G06F113/24
摘要： There is provided a surface shape defect generating region estimating method for estimating a generating region of a surface shape defect of a deformation-processed product obtained by performing deformation processing with respect to a workpiece, the method including: a first stress distribution obtaining process of obtaining first stress distribution σ(T1); a second stress distribution obtaining process of obtaining a second stress distribution σ(T2); a comparative stress distribution obtaining process of obtaining comparative stress distribution σ(T1, T2); a division comparative stress distribution obtaining process of obtaining division comparative stress distribution σDIV(T1, T2); and a surface shape defect generating region estimating process of estimating whether or not each of the divided regions DK is a generating region of the surface shape defect.

8. 发明申请

US20150175208A1 VEHICLE FRAME MEMBER STRUCTURE WITH EXCELLENT IMPACT RESISTANCE PERFORMANCE 有权
标题翻译：具有优异抗冲击性能的车架构件结构
公开(公告)号：US20150175208A1
公开(公告)日：2015-06-25
申请号：US14403367
申请日：2013-06-03
申请人： Nippon Steel & Sumitomo Metal Corporation
发明人： Takuya Kuwayama , Shigeru Yonemura , Masahiko Yoshino , Kazuhiko Honda
IPC分类号： B62D21/15 , B62D21/02
CPC分类号： B62D21/152 , B60R19/34 , B62D21/02
摘要： A vehicle frame member structure has a closed cross-sectional structure including a pair of first wall portions, and a pair of second wall portions connected to the pair of the first wall portions, in which first beads are provided on the pair of first wall portions along a circumferential direction of the closed cross-sectional structure, a second bead is provided on either of the pair of second wall portions along the closed cross-sectional circumferential direction on a line extending from the first bead in the circumferential direction, the first and second beads are connected in two corner portions between the first wall portions and the second wall portion, a recessed embossed portion is provided in a connection portion of the first and second beads in at least one of the corner portions, and the sheet thickness of the embossed portion is larger than that of the first or second wall portion.
摘要翻译：一种车架构件结构具有封闭的横截面结构，包括一对第一壁部分和连接到该一对第一壁部分的一对第二壁部分，其中第一小珠设置在该对第一壁部分上沿着封闭截面结构的圆周方向，沿着沿着圆周方向从第一胎圈延伸的线沿着封闭的横截面圆周方向将第二胎圈设置在一对第二壁部中的任一个上，第一和第第二珠在第一壁部和第二壁部之间的两个角部连接，凹部压花部分设置在第一和第二珠的连接部分中的至少一个拐角部分中，并且板厚度压花部比第1或第2壁部大。

9. 发明申请

US20140287263A1 HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET AND HIGH-STRENGTH ALLOYED HOT-DIP GALVANIZED STEEL SHEET EXCELLENT IN MECHANICAL CUTTING PROPERTY, AND MANUFACTURING METHOD THEREOF 有权
标题翻译：高强度热镀锌钢板和高强度合金热镀锌钢板优良机械切割性能及其制造方法
公开(公告)号：US20140287263A1
公开(公告)日：2014-09-25
申请号：US14348502
申请日：2012-09-28
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Hiroyuki Ban , Kaoru Hiramatsu
IPC分类号： C23C2/02 , C21D8/02
CPC分类号： C21D8/0263 , B32B15/013 , C21D8/0226 , C21D8/0236 , C21D8/0278 , C21D9/46 , C21D2211/001 , C21D2211/005 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/58 , C23C2/02 , C23C2/06 , C23C2/28 , Y10T428/12799
摘要： There is provided a high-strength hot-dip galvanized steel sheet and the like excellent in mechanical cutting property, which are capable of obtaining high ductility while ensuring high strength with maximum tensile strength of 900 MPa or more. The high-strength hot-dip galvanized steel sheet has a sheet thickness of 0.6 to 5.0 mm and has a plating layer on a surface of a steel sheet with component compositions being set in appropriate ranges, in which the steel sheet structure contains a 40 to 90% ferrite phase and a 3% or more retained austenite phase by volume fraction. In the retained austenite phase, a solid solution carbon amount is 0.70 to 1.00%, an average grain diameter is 2.0 μm or less, an average distance between grains is 0.1 to 5.0 μm, a thickness of a decarburized layer in a steel sheet surface layer portion is 0.01 to 10.0 μm, an average grain diameter of oxides contained in the steel, sheet surface layer portion is 30 to 120 nm and an average density thereof is 1.0×1012 oxides/m2 or more, and moreover, a work hardening coefficient (n value) during a 3 to 7% plastic deformation is 0.080 or more on average.
摘要翻译：提供了一种机械切割性优异的高强度热浸镀锌钢板等，其能够获得高延展性，同时确保最大拉伸强度为900MPa以上的高强度。高强度热浸镀锌钢板的板厚为0.6〜5.0mm，在钢板表面具有镀层，成分组成为适当范围，钢板结构体含有40〜 90％的铁素体相和3％以上的残余奥氏体相的体积分数。在残留奥氏体相中，固溶碳量为0.70〜1.00％，平均粒径为2.0μm以下，晶粒间的平均距离为0.1〜5.0μm，钢板表面层的脱碳层的厚度部分为0.01〜10.0μm，钢，片状表面层部的氧化物的平均粒径为30〜120nm，平均密度为1.0×10 12个/ m 2以上，加工硬化系数 n值）在3〜7％塑性变形时平均为0.080以上。

10. 发明申请

US20140234659A1 HIGH-STRENGTH HOT-DIP GALVANIZED STEEL SHEET HAVING EXCELLENT DELAYED FRACTURE RESISTANCE AND MANUFACTURING METHOD THEREOF 有权
标题翻译：具有优异延迟抗断裂性能的高强度热镀锌钢板及其制造方法
公开(公告)号：US20140234659A1
公开(公告)日：2014-08-21
申请号：US14348335
申请日：2012-09-28
申请人： NIPPON STEEL & SUMITOMO METAL CORPORATION
发明人： Hiroyuki Kawata , Naoki Maruyama , Akinobu Murasato , Akinobu Minami , Takeshi Yasui , Takuya Kuwayama , Hiroyuki Ban , Kaoru Hiramatsu
IPC分类号： C23C2/02 , B32B15/01
CPC分类号： C23C2/02 , B21B1/26 , B21B3/00 , B32B15/013 , C21D8/1222 , C21D8/1233 , C21D8/1255 , C21D8/1277 , C21D9/46 , C21D2211/005 , C22C18/04 , C22C38/00 , C22C38/001 , C22C38/002 , C22C38/02 , C22C38/04 , C22C38/06 , C22C38/58 , C23C2/06 , C23C2/26 , C23C2/28 , C23C2/40 , Y10T428/12618 , Y10T428/12799 , Y10T428/12972 , Y10T428/265
摘要： A hot-dip galvanizing layer or an alloyed hot dip galvanizing layer is formed on the surface of a base steel sheet in which in volume fraction, 40 to 90% of a ferrite phase and 5% or less of a retained austenite phase are contained, and a ratio of non-recrystallized ferrite to the entire ferrite phase is 50% or less in volume fraction, and further a grain diameter ratio being a value of, of crystal grains in the ferrite phase, an average grain diameter in the rolling direction divided by an average grain diameter in the sheet width direction is 0.75 to 1.33, a length ratio being a value of, of hard structures dispersed in island shapes, an average length in the rolling direction divided by an average length in the sheet width direction is 0.75 to 1.33, and an average aspect ratio of inclusions is 5.0 or less.
摘要翻译：在基体钢板的表面形成有热浸镀锌层或合金化热镀锌层，其中体积分数为40〜90％的铁素体相和5％以下的残留奥氏体相，未再结晶的铁素体与铁素体相的整体的比例在体积分率中为50％以下，另外，晶粒直径比为铁素体相中的晶粒的值，轧制方向的平均粒径分割通过片宽度方向上的平均粒径为0.75〜1.33，以岛状分散的硬结构的长度比为长度，轧制方向的平均长度除以片宽方向的平均长度为0.75 至1.33，夹杂物的平均纵横比为5.0以下。

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