公开(公告)号：US08795442B2

公开(公告)日：2014-08-05

申请号：US12162878

申请日：2007-03-29

申请人： Yoichi Mukai ,  Shinji Kozuma ,  Masahiro Nomura

发明人： Yoichi Mukai ,  Shinji Kozuma ,  Masahiro Nomura

IPC分类号： C22C38/00 ,  B32B3/00

CPC分类号： C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12993

摘要： The invention provides a high strength cold rolled steel sheet having excellent chemical conversion treatment property stably even Mo is added aiming high strengthening. The surface property of the cold rolled steel sheet satisfies that the characteristic of 10 μm or more of the maximum depth (Ry) of the unevenness and 30 μm or less of the average spacing (Sm) of the unevenness, and that either one or more preferably both of, the characteristic of the load length ratio (tp40) of the unevenness of the surface is 20% or less, and the characteristic of the difference of the load length ratios (tp60) and (tp40) is 60% or more, is satisfied, and the crack of 3 μm or less width and 5 μm or more depth does not exist on the surface.

摘要翻译： 本发明提供了一种具有优异的化学转化处理性能的高强度冷轧钢板，即使添加Mo以达到高强度。 冷轧钢板的表面性能满足不平坦部的最大深度（Ry）为10μm以上，凹凸的平均间隔（Sm）为30μm以下的特性， 优选地，表面的不平坦度的负载长度比（tp40）的特性都为20％以下，负载长度比（tp60）和（tp40）的差的特性为60％以上， 并且表面上不存在3μm以下的宽度和5μm以上的深度的裂纹。

公开(公告)号：US20090014095A1

公开(公告)日：2009-01-15

申请号：US12162878

申请日：2007-03-29

申请人： Yoichi Mukai ,  Shinji Kozuma ,  Masahiro Nomura

发明人： Yoichi Mukai ,  Shinji Kozuma ,  Masahiro Nomura

IPC分类号： C22C38/00 ,  B32B3/00

CPC分类号： C21D9/46 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  Y10T428/12993

摘要： The invention provides a high strength cold rolled steel sheet having excellent chemical conversion treatment property stably even Mo is added aiming high strengthening. The surface property of the cold rolled steel sheet satisfies that the characteristic of 10 μm or more of the maximum depth (Ry) of the unevenness and 30 μm or less of the average spacing (Sm) of the unevenness, and that either one or more preferably both of, the characteristic of the load length ratio (tp40) of the unevenness of the surface is 20% or less, and the characteristic of the difference of the load length ratios (tp60) and (tp40) is 60% or more, is satisfied, and the crack of 3 μm or less width and 5 μm or more depth does not exist on the surface.

摘要翻译： 本发明提供了一种具有优异的化学转化处理性能的高强度冷轧钢板，即使添加Mo以达到高强度。 冷轧钢板的表面特性满足不平坦部的最大深度（Ry）为10μm以上，凹凸的平均间隔（Sm）为30μm以下的特性，以及任一个或多个 优选地，表面的不平坦度的负载长度比（tp40）的特性都为20％以下，负载长度比（tp60）和（tp40）的差的特性为60％以上， 满意，表面上不存在3μm以下的宽度和5μm以上的深度的裂纹。

公开(公告)号：US20090238713A1

公开(公告)日：2009-09-24

申请号：US12159400

申请日：2006-12-28

申请人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

发明人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

IPC分类号： C22C38/00 ,  C22C38/42 ,  C22C38/22 ,  C22C38/18 ,  C22C38/20 ,  C22C38/40 ,  C22C38/04

CPC分类号： C21D9/48 ,  C21D1/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50

摘要： The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, 0.15% or less of P, 0.02% or less of S, 1.5% or less of Al, 0.003 to 2.0% of Cr, and a balance including iron and inevitable impurities; in which grains of residual austenite have an average axis ratio (major axis/minor axis) of 5 or more, the grains of the residual austenite have an average minor axis length of 1 μm or less, and the grains of the residual austenite have a nearest-neighbor distance between the grains of 1 μm or less.

摘要翻译： 本发明涉及耐氢脆性优异的超高强度薄钢板，该钢板以重量％计，C：0.10〜0.60％，Si：1.0〜3.0％，Mn：1.0〜3.5％，Mn：0.15％ 以下的P，0.02％以下的S，1.5％以下的Al，0.003〜2.0％的Cr，余量包括铁和不可避免的杂质; 其中残余奥氏体的晶粒的平均轴比（长轴/短轴）为5以上，残留奥氏体的平均短轴长度为1μm以下，残留奥氏体的晶粒为 1个或更少的颗粒之间的最邻近距离。

公开(公告)号：US20090053096A1

公开(公告)日：2009-02-26

申请号：US11908616

申请日：2006-03-23

申请人： Masaaki Miura ,  Shinji Kozuma ,  Yoichi Mukai ,  Yoshinobu Omiya

发明人： Masaaki Miura ,  Shinji Kozuma ,  Yoichi Mukai ,  Yoshinobu Omiya

IPC分类号： C22C38/02 ,  C22C38/06

CPC分类号： C22C38/02 ,  C21D8/0468 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06

摘要： A cold rolled steel sheet satisfying on the basis of percent by mass the chemical composition of 0.06-0.6% C, 0.1-2% Si, 0.01-3% Al, 1-4% Si+Al, 1-6% Mn, Si/Mn≦0.40, in which there exists 10 or more pieces/100 μm2 of Mn—Si composite oxide having Mn—Si atom ratio (Mn/Si) of 0.5 or over and major axis of from 0.01 μm to 5 μm and also having a covering ratio of 10% or below at which the surface of the steel sheet is covered with oxide containing Si as the main component.

摘要翻译： 冷轧钢板以化学组成为0.06-0.6％C，0.1-2％Si，0.01-3％Al，1-4％Si + Al，1-6％Mn，Si 其中存在Mn-Si原子比（Mn / Si）为0.5以上且长轴为0.01μm〜5μm的Mn-Si复合氧化物的10个以上/100μm2以上的/Mn<=0.40 覆盖率为10％以下的钢板的表面覆盖有以Si为主要成分的氧化物。

公开(公告)号：US20050167007A1

公开(公告)日：2005-08-04

申请号：US11045309

申请日：2005-01-31

申请人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

发明人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

IPC分类号： C21D9/46 ,  C22C38/00 ,  C22C38/18 ,  C22C38/38

CPC分类号： C22C38/22 ,  C22C38/02 ,  C22C38/38

摘要： A high-strength cold-rolled steel sheet is disclosed that comprises a steel including C: 0.05 to 0.13 mass %, Si: 0.5 to 2.5 mass %, and Mn: 0.5 to 3.5 mass %, as well as Mo: 0.05 to 0.6 mass % and/or Cr: 0.05 to 1.0 mass %. The steel sheet is of composite structure of a ferrite+a second phase wherein the second phase has an area rate of 30 to 70% and is combined approximately in a shape of a network; a circle-equivalent average ferrite grain size is not more than 10 μm; and a circle-equivalent diameter of ferrite grain aggregate that exists continuously in an area surrounded by the second phase is not more than 3 times of the average ferrite grain size. The steel sheet has a high-strength and satisfies a balance of elongation and stretch flange formability (ratio of hole expansion) at a higher level.

摘要翻译： 公开了一种高强度冷轧钢板，其包括C：0.05〜0.13质量％，Si：0.5〜2.5质量％，Mn：0.5〜3.5质量％，Mo：0.05〜0.6质量％ ％和/或Cr：0.05〜1.0质量％。 所述钢板为铁素体+第二相的复合结构，其中第二相的面积率为30〜70％，大致为网状; 圆当量平均铁素体晶粒尺寸不大于10um; 并且在由第二相包围的区域中连续存在的铁素体晶粒集合体的圆当量直径不大于平均铁素体晶粒尺寸的3倍。 钢板具有高强度，并且在较高水平上满足伸长率和拉伸凸缘成形性（孔膨胀比）的平衡。

公开(公告)号：US08986468B2

公开(公告)日：2015-03-24

申请号：US11908616

申请日：2006-03-23

申请人： Masaaki Miura ,  Shinji Kozuma ,  Yoichi Mukai ,  Yoshinobu Omiya

发明人： Masaaki Miura ,  Shinji Kozuma ,  Yoichi Mukai ,  Yoshinobu Omiya

IPC分类号： C22C38/00 ,  C21D8/04 ,  C21D9/46 ,  C21D9/48 ,  C22C38/04 ,  C22C38/02 ,  C22C38/06

CPC分类号： C22C38/02 ,  C21D8/0468 ,  C21D9/46 ,  C21D9/48 ,  C21D2211/004 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/04 ,  C22C38/06

摘要： A cold rolled steel sheet satisfying on the basis of percent by mass the chemical composition of 0.06-0.6% C, 0.1-2% Si, 0.01-3% Al, 1-4% Si+Al, 1-6% Mn, Si/Mn≦0.40, in which there exists 10 or more pieces/100 μm2 of Mn—Si composite oxide having Mn—Si atom ratio (Mn/Si) of 0.5 or over and major axis of from 0.01 μm to 5 μm and also having a covering ratio of 10% or below at which the surface of the steel sheet is covered with oxide containing Si as the main component.

摘要翻译： 冷轧钢板以化学组成为0.06-0.6％C，0.1-2％Si，0.01-3％Al，1-4％Si + Al，1-6％Mn，Si 其中存在Mn-Si原子比（Mn / Si）为0.5以上且长轴为0.01μm〜5μm的Mn-Si复合氧化物的10个以上/100μm2以上的MnMnnnE.0.40，并且还具有 钢板的表面被包含以Si为主要成分的氧化物覆盖的10％以下的覆盖率。

公开(公告)号：US07887648B2

公开(公告)日：2011-02-15

申请号：US12159400

申请日：2006-12-28

申请人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

发明人： Junichiro Kinugasa ,  Fumio Yuse ,  Yoichi Mukai ,  Shinji Kozuma ,  Hiroshi Akamizu ,  Kouji Kasuya ,  Muneaki Ikeda ,  Koichi Sugimoto

IPC分类号： C22C38/32 ,  C22C38/28

CPC分类号： C21D9/48 ,  C21D1/20 ,  C21D2211/001 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/008 ,  C22C38/005 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/32 ,  C22C38/34 ,  C22C38/38 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/50

摘要： The invention relates to an ultrahigh-strength thin steel sheet excellent in the hydrogen embrittlement resistance, the steel sheet including, by weight %, 0.10 to 0.60% of C, 1.0 to 3.0% of Si, 1.0 to 3.5% of Mn, 0.15% or less of P, 0.02% or less of S, 1.5% or less of Al, 0.003 to 2.0% of Cr, and a balance including iron and inevitable impurities; in which grains of residual austenite have an average axis ratio (major axis/minor axis) of 5 or more, the grains of the residual austenite have an average minor axis length of 1 μm or less, and the grains of the residual austenite have a nearest-neighbor distance between the grains of 1 μm or less.

摘要翻译： 本发明涉及耐氢脆性优异的超高强度薄钢板，该钢板以重量％计，C：0.10〜0.60％，Si：1.0〜3.0％，Mn：1.0〜3.5％，Mn：0.15％ 以下的P，0.02％以下的S，1.5％以下的Al，0.003〜2.0％的Cr，余量包括铁和不可避免的杂质; 其中残余奥氏体的晶粒的平均轴比（长轴/短轴）为5以上，残留奥氏体的平均短轴长度为1μm以下，残留奥氏体的晶粒为 颗粒之间的最近邻距离为1μm以下。

公开(公告)号：US07371294B2

公开(公告)日：2008-05-13

申请号：US11045309

申请日：2005-01-31

申请人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

发明人： Masaaki Miura ,  Yoichi Mukai ,  Yoshinobu Omiya ,  Shinji Kozuma

IPC分类号： C22C38/22 ,  C22C38/12

CPC分类号： C22C38/22 ,  C22C38/02 ,  C22C38/38

摘要： A high-strength cold-rolled steel sheet is disclosed that comprises a steel including C: 0.05 to 0.13 mass %, Si: 0.5 to 2.5 mass %, and Mn: 0.5 to 3.5 mass %, as well as Mo: 0.05 to 0.6 mass % and/or Cr: 0.05 to 1.0 mass %. The steel sheet is of composite structure of a ferrite+a second phase wherein the second phase has an area rate of 30 to 70% and is combined approximately in a shape of a network; a circle-equivalent average ferrite grain size is not more than 10 μm; and a circle-equivalent diameter of ferrite grain aggregate that exists continuously in an area surrounded by the second phase is not more than 3 times of the average ferrite grain size. The steel sheet has a high-strength and satisfies a balance of elongation and stretch flange formability (ratio of hole expansion) at a higher level.

摘要翻译： 公开了一种高强度冷轧钢板，其包括C：0.05〜0.13质量％，Si：0.5〜2.5质量％，Mn：0.5〜3.5质量％，Mo：0.05〜0.6质量％ ％和/或Cr：0.05〜1.0质量％。 所述钢板为铁素体+第二相的复合结构，其中第二相的面积率为30〜70％，大致为网状; 圆当量平均铁素体晶粒尺寸不大于10um; 并且在由第二相包围的区域中连续存在的铁素体晶粒集合体的圆当量直径不大于平均铁素体晶粒尺寸的3倍。 钢板具有高强度，并且在较高水平上满足伸长率和拉伸凸缘成形性（孔膨胀比）的平衡。

公开(公告)号：US20090032148A1

公开(公告)日：2009-02-05

申请号：US11909724

申请日：2006-03-30

申请人： Shinji Kozuma ,  Masahiro Nomura ,  Ikuro Hashimoto

发明人： Shinji Kozuma ,  Masahiro Nomura ,  Ikuro Hashimoto

IPC分类号： C22C38/54

CPC分类号： C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C22C38/58 ,  C23C22/12 ,  C23G1/08 ,  Y10T428/12979 ,  Y10T428/12993 ,  Y10T428/26

摘要： There is provided a high-strength hot rolled steel sheet excellent in phosphatability, wherein a maximum depth (Ry) of pits and bumps, existing on a surface thereof, is not less than 10 μm, and an average interval (Sm) of the pits and the bumps is not more than 30 μm, meeting either a requirement for a load length ratio (tp40) of the pits and the bumps on the surface at not more than 20%, or a requirement for a difference between a load length ratio (tp60) and the load length ratio (tp40), at not less than 60%, or both thereof. The high-strength hot rolled steel sheet is capable of exhibiting stable and excellent phosphatability even if Mo highly effective for reinforcement in strength is added thereto in expectation of a higher strength.

摘要翻译： 提供了优异的磷酸盐性的高强度热轧钢板，其表面上存在的凹坑和凸块的最大深度（Ry）不小于10μm，凹坑的平均间隔（Sm） 并且凸起不大于30μm，满足凹坑的负载长度比（tp40）和表面上的凸块的要求不大于20％，或者要求负载长度比（ tp60）和负载长度比（tp40），不小于60％，或其两者。 高强度热轧钢板即使在强度高的情况下也能够高效地加强强化，能够表现出稳定且优异的磷酸化性。

公开(公告)号：US07960035B2

公开(公告)日：2011-06-14

申请号：US11909724

申请日：2006-03-30

申请人： Shinji Kozuma ,  Masahiro Nomura ,  Ikuro Hashimoto

发明人： Shinji Kozuma ,  Masahiro Nomura ,  Ikuro Hashimoto

IPC分类号： B32B3/00 ,  B32B5/00 ,  B32B15/00 ,  B32B15/18 ,  B32B15/20

CPC分类号： C21D9/46 ,  C22C38/00 ,  C22C38/06 ,  C22C38/58 ,  C23C22/12 ,  C23G1/08 ,  Y10T428/12979 ,  Y10T428/12993 ,  Y10T428/26

摘要： There is provided a high-strength hot rolled steel sheet excellent in phosphatability, wherein a maximum depth (Ry) of pits and bumps, existing on a surface thereof, is not less than 10 μm, and an average interval (Sm) of the pits and the bumps is not more than 30 μm, meeting either a requirement for a load length ratio (tp40) of the pits and the bumps on the surface at not more than 20%, or a requirement for a difference between a load length ratio (tp60) and the load length ratio (tp40), at not less than 60%, or both thereof. The high-strength hot rolled steel sheet is capable of exhibiting stable and excellent phosphatability even if Mo highly effective for reinforcement in strength is added thereto in expectation of a higher strength.

摘要翻译： 提供了优异的磷酸化性的高强度热轧钢板，其中存在于其表面上的凹坑和凸块的最大深度（Ry）不小于10μm，并且凹坑的平均间隔（Sm） 并且凸起不大于30μm，满足对凹坑的负载长度比（tp40）和表面上的凸块的要求不大于20％，或者要求负载长度比（ tp60）和负载长度比（tp40），不小于60％，或其两者。 高强度热轧钢板即使在强度高的情况下也能够高效地加强强化，能够表现出稳定且优异的磷酸化性。