公开(公告)号：US08728257B2

公开(公告)日：2014-05-20

申请号：US11795362

申请日：2006-05-29

申请人： Kenji Oi ,  Akihide Nagao ,  Kenji Hayashi

发明人： Kenji Oi ,  Akihide Nagao ,  Kenji Hayashi

IPC分类号： C21D6/00 ,  C21D8/00 ,  C21D10/00

CPC分类号： C21D9/08 ,  C21D9/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

摘要： The invention provides a high tensile strength steel material having a tensile strength of 600 MPa, which is excellent in delayed fracture resistance property, and a method of manufacturing the steel material. As means for this, a steel material contains, in mass percent, C of 0.02 to 0.25%, Si of 0.01 to 0.8%, Mn of 0.5 to 2.0%, Al of 0.005 to 0.1%, N of 0.0005 to 0.008%, P of 0.03% or less, and S of 0.03% or less. In addition, the steel material contains at least one element selected from Mo, Nb, V, and Ti, and contains at least one of Cu, Ni, Cr, W, B, Ca, REM and Mg, as needed. The remainder includes Fe and inevitable impurities. In addition, in the steel material, precipitates having an average grain size of 20 nm or less, which contains at least one of Mo, Nb, V and Ti, are contained in steel in the number of at least 5 per 250000 nm2, and a microstructure includes residual austenite in a volume fraction of 0.5 to 5%. When Ca to be added is specified to be 0.0010% to 0.0020%, it is specified that S is 0.0005% to 0.0020% and O is 0.0008% to 0.0025%. ACR is specified to be 0.2≦ACR(=(Ca−(0.18+130*Ca)*O)/1.25/S)≦1.0.

摘要翻译： 本发明提供一种拉伸强度为600MPa，耐延迟断裂性优异的高强度钢材，以及钢材的制造方法。 作为这种方式，钢材以质量％计含有0.02〜0.25％的C，0.01〜0.8％的Si，0.5〜2.0％的Mn，0.005〜0.1％的Al，0.0005〜0.008％的N，P 为0.03％以下，S为0.03％以下。 此外，钢材含有选自Mo，Nb，V，Ti中的至少一种元素，根据需要含有Cu，Ni，Cr，W，B，Ca，REM和Mg中的至少一种。 余量包括Fe和不可避免的杂质。 此外，在钢材中，含有Mo，Nb，V，Ti中的至少一种的平均粒径为20nm以下的析出物，以每250000nm 2以上的数量含有钢， 显微组织包括体积分数为0.5〜5％的残余奥氏体。 当添加Ca为0.0010〜0.0020％时，规定S为0.0005〜0.0020％，O为0.0008〜0.0025％。 ACR指定为0.2＆nlE; ACR（=（Ca-（0.18 + 130 * Ca）* O）/1.25/S）＆nlE; 1.0。

公开(公告)号：US08357252B2

公开(公告)日：2013-01-22

申请号：US12524988

申请日：2008-01-31

申请人： Akihide Nagao ,  Kenji Oi ,  Kenji Hayashi ,  Nobuo Shikanai

发明人： Akihide Nagao ,  Kenji Oi ,  Kenji Hayashi ,  Nobuo Shikanai

IPC分类号： C21D8/02 ,  C22C38/00 ,  C22C38/22 ,  C22C38/44

CPC分类号： C21D8/0205 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： High tensile strength steels that have both favorable delayed fracture resistance and a tensile strength of 600 MPa or higher and are suitably used in construction machinery, tanks, penstocks, and pipelines, as well as methods for manufacturing such steels are provided. The safety index of delayed fracture resistance (%) is 100×(X1/X0), where X0: reduction of area of a specimen substantially free from diffusible hydrogen, and X1: reduction of area of a specimen containing diffusible hydrogen.

摘要翻译： 提供具有良好的延迟抗断裂性和600MPa以上的抗拉强度并且适用于工程机械，罐，管道和管道的高抗拉强度钢以及用于制造这种钢的方法。 延迟断裂电阻（％）的安全指数为100×（X1 / X0），其中X0：样品的基本上不含扩散氢的面积减少，X1：包含可扩散氢的试样的面积减小。

公开(公告)号：US20100024926A1

公开(公告)日：2010-02-04

申请号：US12524988

申请日：2008-01-31

申请人： Akihide Nagao ,  Kenji Oi ,  Kenji Hayashi ,  Nobuo Shikanai

发明人： Akihide Nagao ,  Kenji Oi ,  Kenji Hayashi ,  Nobuo Shikanai

IPC分类号： C21D8/00 ,  C22C38/00 ,  C22C38/22 ,  C22C38/44 ,  C22C38/02 ,  C22C38/04 ,  C22C38/16 ,  C22C38/20 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54

CPC分类号： C21D8/0205 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06

摘要： High tensile strength steels that have both favorable delayed fracture resistance and a tensile strength of 600 MPa or higher and are suitably used in construction machinery, tanks, penstocks, and pipelines, as well as methods for manufacturing such steels are provided. The safety index of delayed fracture resistance (%) is 100×(X1/X0), where X0: reduction of area of a specimen substantially free from diffusible hydrogen, and X1: reduction of area of a specimen containing diffusible hydrogen.

摘要翻译： 提供具有良好的延迟抗断裂性和600MPa以上的抗拉强度并且适用于工程机械，罐，管道和管道的高抗拉强度钢以及用于制造这种钢的方法。 延迟断裂电阻（％）的安全指数为100x（X1 / X0），其中X0：试样基本上不含扩散氢的面积减少，X1：包含可扩散氢的试样的面积减小。

公开(公告)号：US20080110535A1

公开(公告)日：2008-05-15

申请号：US11795362

申请日：2006-05-29

申请人： Kenji Oi ,  Akihide Nagao ,  Kenji Hayashi

发明人： Kenji Oi ,  Akihide Nagao ,  Kenji Hayashi

IPC分类号： C21D7/00 ,  C22C38/00

CPC分类号： C21D9/08 ,  C21D9/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/22

摘要： The invention provides a high tensile strength steel material having a tensile strength of 600 MPa, which is excellent in delayed fracture resistance property, and a method of manufacturing the steel material. As means for this, a steel material contains, in mass percent, C of 0.02 to 0.25%, Si of 0.01 to 0.8%, Mn of 0.5 to 2.0%, Al of 0.005 to 0.1%, N of 0.0005 to 0.008%, P of 0.03% or less, and S of 0.03% or less. In addition, the steel material contains at least one element selected from Mo, Nb, V, and Ti, and contains at least one of Cu, Ni, Cr, W, B, Ca, REM and Mg, as needed. The remainder includes Fe and inevitable impurities. In addition, in the steel material, precipitates having an average grain size of 20 nm or less, which contains at least one of Mo, Nb, V and Ti, are contained in steel in the number of at least 5 per 250000 nm2, and a microstructure includes residual austenite in a volume fraction of 0.5 to 5%. When Ca to be added is specified to be 0.0010% to 0.0020%, it is specified that S is 0.0005% to 0.0020% and O is 0.0008% to 0.0025%. ACR is specified to be 0.2≦ACR(=(Ca-(0.18+130*Ca)*O)/1.25/S)≦1.0.

摘要翻译： 本发明提供一种拉伸强度为600MPa，耐延迟断裂性优异的高强度钢材，以及钢材的制造方法。 作为这种方式，钢材以质量％计含有0.02〜0.25％的C，0.01〜0.8％的Si，0.5〜2.0％的Mn，0.005〜0.1％的Al，0.0005〜0.008％的N，P 为0.03％以下，S为0.03％以下。 此外，钢材含有选自Mo，Nb，V，Ti中的至少一种元素，根据需要含有Cu，Ni，Cr，W，B，Ca，REM和Mg中的至少一种。 余量包括Fe和不可避免的杂质。 此外，在钢材中，钢中含有Mo，Nb，V，Ti中的至少一种的平均粒径为20nm以下的析出物，以每250000nm ^{2，微观结构包括体积分数为0.5〜5％的残余奥氏体。 当添加Ca为0.0010〜0.0020％时，规定S为0.0005〜0.0020％，O为0.0008〜0.0025％。 ACR被指定为0.2 <= ACR（=（Ca-（0.18 + 130 * Ca）* O）/1.25/S）<= 1.0。}

公开(公告)号：US07648597B2

公开(公告)日：2010-01-19

申请号：US10585548

申请日：2005-07-06

申请人： Akihide Nagao ,  Kenji Oi

发明人： Akihide Nagao ,  Kenji Oi

IPC分类号： C21D8/02

CPC分类号： C22C38/02 ,  C21D8/02 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06

摘要： The present invention provides a method for manufacturing high tensile strength steel plate having 570 MPa (N/mm2) or larger tensile strength and having also extremely superior balance of strength and toughness both before PWHT and after PWHT to that of the conventional steel plates, by specifically specifying the temperature-rising rate at the plate thickness center portion of a quenched and tempered material during tempering, and to be concrete, the method has the steps of: casting a steel consisting essentially of 0.02 to 0.18% C, 0.05 to 0.5% Si, 0.5 to 2.0% Mn, 0.005 to 0.1% Al, 0.0005 to 0.008% N, 0.03% or less P, 0.03% or less S, by mass, and balance of Fe and inevitable impurities; hot-rolling the cast steel without cooling the steel to the Ar3 transformation point or lower temperature, or after reheating the steel to the Ac3 transformation point or higher temperature, to a specified plate thickness; cooling the steel by direct quenching from the Ar3 transformation point or higher temperature, or by accelerated cooling, to 400° C. or lower temperature; and then tempering the steel, using a heating apparatus being installed directly connecting the manufacturing line containing a rolling mill and a direct-quenching apparatus or an accelerated cooling apparatus, to 520° C. or above of the maximum ultimate temperature at the plate thickness center portion at an average temperature-rising rate of 1° C./s or larger at the plate thickness center portion up to a specified tempering temperature between 460° C. and the Ac1 transformation point.

摘要翻译： 本发明提供一种具有570MPa（N / mm2）以上拉伸强度的高抗拉强度钢板的方法，并且在PWHT之前和PWHT之后的强度和韧性平衡优于常规钢板的强度和韧性平衡方法，通过 具体说明回火期间淬火回火材料的板厚中心部分的升温速率，并且为混凝土，该方法具有以下步骤：铸造基本上由0.02至0.18％C，0.05至0.5％ Si，0.5〜2.0％Mn，0.005〜0.1％Al，0.0005〜0.008％N，0.03％以下P，0.03％以下S，余量为Fe和不可避免的杂质; 热轧铸钢而不将钢冷却至Ar3相变点或更低温度，或者将钢再加热至Ac3相变点或更高温度至规定的板厚度; 通过从Ar3相变点或更高温度或通过加速冷却直接淬火至400℃或更低温度来冷却钢; 然后使用将包含轧机和直接淬火装置或加速冷却装置的生产线直接连接的加热装置回火至钢板厚度中心的最高极限温度的520℃以上 部分在板厚中心部分的平均升温速度为1℃/ s以上，直到规定的回火温度在460℃与Ac1相变点之间。

公开(公告)号：US20080283158A1

公开(公告)日：2008-11-20

申请号：US10585548

申请日：2005-07-06

申请人： Akihide Nagao ,  Kenji Oi

发明人： Akihide Nagao ,  Kenji Oi

IPC分类号： C21D8/02 ,  C22C38/00

CPC分类号： C22C38/02 ,  C21D8/02 ,  C22C38/001 ,  C22C38/04 ,  C22C38/06

摘要： The present invention provides a method for manufacturing high tensile strength steel plate having 570 MPa (N/mm2) or larger tensile strength and having also extremely superior balance of strength and toughness both before PWHT and after PWHT to that of the conventional steel plates, by specifically specifying the temperature-rising rate at the plate thickness center portion of a quenched and tempered material during tempering, and to be concrete, the method has the steps of: casting a steel consisting essentially of 0.02 to 0.18% C, 0.05 to 0.5% Si, 0.5 to 2.0% Mn, 0.005 to 0.1% Al, 0.0005 to 0.008% N, 0.03% or less P, 0.03% or less S, by mass, and balance of Fe and inevitable impurities; hot-rolling the cast steel without cooling the steel to the Ar3 transformation point or lower temperature, or after reheating the steel to the AC3 transformation point or higher temperature, to a specified plate thickness; cooling the steel by direct quenching from the Ar3 transformation point or higher temperature, or by accelerated cooling, to 400° C. or lower temperature; and then tempering the steel, using a heating apparatus being installed directly connecting the manufacturing line containing a rolling mill and a direct-quenching apparatus or an accelerated cooling apparatus, to 520° C. or above of the maximum ultimate temperature at the plate thickness center portion at an average temperature-rising rate of 1° C./s or larger at the plate thickness center portion up to a specified tempering temperature between 460° C. and the Ac1 transformation point.

摘要翻译： 本发明提供一种制造具有570MPa（N / mm 2以上）或更高拉伸强度的高抗拉强度钢板的方法，并且在PWHT之前和PWHT之后还具有非常优异的强度和韧性平衡 传统钢板的特征是通过具体指定回火期间淬火回火材料的板厚中心部分的温度上升率，并且为混凝土，该方法具有以下步骤：将基本上由0.02组成的钢浇铸到 0.18％C，0.05〜0.5％Si，0.5〜2.0％Mn，0.005〜0.1％Al，0.0005〜0.008％N，0.03％以下P，0.03％以下S，余量为Fe和不可避免的杂质 ; 热轧铸钢而不将钢冷却至Ar 3 3相变点或更低的温度，或者在将钢再加热到AC 3 3相变点或更高的温度之后，至 指定板厚; 通过从Ar 3 N 3相变点或更高温度或通过加速冷却直接淬火至400℃或更低的温度来冷却钢; 然后使用将包含轧机和直接淬火装置或加速冷却装置的生产线直接连接的加热装置回火至钢板厚度中心的最高极限温度的520℃以上 在板厚中心部分的平均升温速度为1℃/ s以上，直到460℃与Ac 1 H 1相变点之间的规定回火温度。

公开(公告)号：US20060182178A1

公开(公告)日：2006-08-17

申请号：US11339829

申请日：2006-01-26

申请人： Kenji Oi ,  Kazuaki Okamoto ,  Hideo Hirono

发明人： Kenji Oi ,  Kazuaki Okamoto ,  Hideo Hirono

IPC分类号： H04N11/02 ,  H04N11/04 ,  H04N7/12 ,  H04B1/66

CPC分类号： H04N19/583

摘要： A moving picture data transmission apparatus according to the present invention includes: a weight assigner which assigns a weight to a macroblock on a first picture frame in accordance with the ratio of an overlap region where a reference picture block overlaps the macroblock on a picture frame; and a transmission method controller which controls a transmission method of the macroblock based on the weight assigned by the weight assigner.

摘要翻译： 根据本发明的运动图像数据传输装置包括：权重分配器，其根据在参考图像块与图像帧上的宏块重叠的重叠区域的比率，向第一图像帧上的宏块分配权重; 以及传输方法控制器，其基于由权重分配器分配的权重来控制宏块的传输方法。

公开(公告)号：US5900076A

公开(公告)日：1999-05-04

申请号：US979625

申请日：1997-11-28

申请人： Tohru Hayashi ,  Keniti Amano ,  Mitsuhiro Okatsu ,  Kenji Oi ,  Fumimaru Kawabata ,  Tomoya Koseki ,  Noritsugu Itakura ,  Hiroki Ota

发明人： Tohru Hayashi ,  Keniti Amano ,  Mitsuhiro Okatsu ,  Kenji Oi ,  Fumimaru Kawabata ,  Tomoya Koseki ,  Noritsugu Itakura ,  Hiroki Ota

IPC分类号： C21D6/02 ,  C21D8/02 ,  C22C38/04 ,  C22C38/12 ,  C21D8/00

CPC分类号： C21D6/02 ,  C21D8/02 ,  C21D8/0226 ,  C22C38/04 ,  C22C38/12 ,  C21D2211/002 ,  C21D8/0263

摘要： This invention provides bainite steel materials having a less scattering of properties in a thickness direction or between steel materials by using a chemical composition of C: not less than 0.001 wt % but less than 0.030 wt %, Si: not more than 0.60 wt %, Mn: 1.00-3.00 wt %, Nb: 0.005-0.20 wt %, B: 0.0003-0.0050 wt % and Al: not more than 0.100 wt % and rendering not less than 90% of the material into a bainite texture in steel materials such as thick steel plates, steel sheets, section steels, rod steels and the like.

摘要翻译： 本发明提供一种贝氏体钢材料，其厚度方向上或钢材之间的性能散射小，通过使用化学组成为C：不小于0.001重量％但小于0.030重量％，Si：不大于0.60重量％ Mn：1.00-3.00重量％，Nb：0.005-0.20重量％，B：0.0003-0.0050重​​量％，Al：不大于0.100重量％，并且使不少于90重量％的材料成为贝氏体组织， 作为厚钢板，钢板，截面钢，棒钢等。

公开(公告)号：US5766381A

公开(公告)日：1998-06-16

申请号：US646373

申请日：1996-05-15

申请人： Tohru Hayashi ,  Keniti Amano ,  Mitsuhiro Okatsu ,  Kenji Oi ,  Fumimaru Kawabata ,  Tomoya Koseki ,  Noritsugu Itakura ,  Hiroki Ota

发明人： Tohru Hayashi ,  Keniti Amano ,  Mitsuhiro Okatsu ,  Kenji Oi ,  Fumimaru Kawabata ,  Tomoya Koseki ,  Noritsugu Itakura ,  Hiroki Ota

IPC分类号： C21D6/02 ,  C21D8/02 ,  C22C38/04 ,  C22C38/12 ,  C21D8/00

CPC分类号： C21D6/02 ,  C21D8/02 ,  C21D8/0226 ,  C22C38/04 ,  C22C38/12 ,  C21D2211/002 ,  C21D8/0263

摘要： This invention provides bainite steel materials having a less scattering of properties in a thickness direction or between steel materials by using a chemical composition of C: not less than 0.001 wt % but less than 0.030 wt %, Si: not more than 0.60 wt %, Mn: 1.00-3.00 wt %, Nb: 0.005-0.20 wt %, B: 0.0003-0.0050 wt % and Al: not more than 0.100 wt % and rendering not less than 90% of the material into a bainite texture in steel materials such as thick steel plates, steel sheets, section steels, rod steels and the like.

摘要翻译： PCT No.PCT / JP95 / 01871 Sec。 371日期：1996年5月15日 102（e）日期1996年5月15日PCT提交1995年9月20日PCT公布。 出版物WO96 / 09419 日本特开1996年3月28日本发明提供了通过使用C：不小于0.001重量％但小于0.030重量％的化学组成，在厚度方向或钢材之间具有较小散射特性的贝氏体钢材料，Si：不更多 比例为0.60重量％，Mn：1.00-3.00重量％，Nb：0.005-0.20重量％，B：0.0003-0.0050重​​量％，Al：不大于0.100重量％，并使不少于90重量％的贝氏体材料 粗钢板，钢板，截面钢，棒钢等钢材的质地。

公开(公告)号：US09364921B2

公开(公告)日：2016-06-14

申请号：US14004271

申请日：2011-04-28

申请人： Koji Yano ,  Hiroyuki Sumi ,  Kenji Oi

发明人： Koji Yano ,  Hiroyuki Sumi ,  Kenji Oi

IPC分类号： B23K26/262 ,  B23K26/28 ,  B21C37/08 ,  B23K26/06 ,  B23K26/32

CPC分类号： B23K26/282 ,  B21C37/08 ,  B23K26/0608 ,  B23K26/262 ,  B23K26/32 ,  B23K2103/04 ,  B23K2103/50

摘要： A method of manufacturing a laser welded steel pipe by forming a steel strip into a cylindrical open pipe and performing laser welding on edges that includes: emitting two laser beams along the edges from an upper surface side of the open pipe, the two laser beams being transmitted through different optical fibers with in-focus spot diameters exceeding 0.3 mm; emitting leading and trailing laser beams each inclined toward a direction in which welding proceeds at an incident angle with respect to a direction perpendicular to an upper surface of the open pipe; setting the incident angle of the leading laser beam to be larger than the incident angle of the trailing laser beam; and setting a gap between a center point of the leading laser beam and a center point of the trailing laser beam on a back surface of the open pipe to 1 mm or larger.

摘要翻译： 一种激光焊接钢管的制造方法，其特征在于，将钢带形成为圆筒状的开口管，并在边缘进行激光焊接，所述边缘包括：从所述开口管的上表面侧沿着边缘发射两束激光，所述两束激光束 透射通过不同的光纤，焦点光点直径超过0.3 mm; 发射前导和后退的激光束，每个激光束朝向相对于垂直于所述开放管的上表面的方向以入射角进行焊接的方向倾斜; 将前导激光束的入射角设定为大于后退激光束的入射角; 并且将开启管的背面上的前导激光束的中心点与后方激光束的中心点之间的间隔设定为1mm以上。