公开(公告)号：US5900076A

公开(公告)日：1999-05-04

申请号：US979625

申请日：1997-11-28

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

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

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

CPC classification number: C21D6/02 ,  C21D8/02 ,  C21D8/0226 ,  C22C38/04 ,  C22C38/12 ,  C21D2211/002 ,  C21D8/0263

Abstract: 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.

Abstract translation: 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

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

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

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

CPC classification number: C21D6/02 ,  C21D8/02 ,  C21D8/0226 ,  C22C38/04 ,  C22C38/12 ,  C21D2211/002 ,  C21D8/0263

Abstract: 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.

Abstract translation: 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：US5743972A

公开(公告)日：1998-04-28

申请号：US697645

申请日：1996-08-27

Applicant: Tatsumi Kimura ,  Kiyoshi Uchida ,  Fumimaru Kawabata ,  Keniti Amano ,  Takanori Okui

Inventor： Tatsumi Kimura ,  Kiyoshi Uchida ,  Fumimaru Kawabata ,  Keniti Amano ,  Takanori Okui

IPC: C21D8/00 ,  C21D8/02 ,  C22C38/12

CPC classification number: C21D8/0226 ,  C21D8/00 ,  C22C38/12 ,  C21D2211/002 ,  C21D2211/005 ,  C21D2211/009

Abstract: A heavy-wall steel having a flange thickness of about 40 mm or more and possessing excellent strength, toughness, weldability, and seismic resistance capable of being used for structure members such as columns and beams of high-rise buildings. The heavy-wall steel has a tensile strength of about 490-690 MPa, a yield ratio of about 80% or less, and Charpy absorbed energy at 0.degree. C. of about 27 J or more at the center in terms of thickness of the flange portion in each of the rolling direction, the direction perpendicular to the rolling direction, and the plate-thickness direction.

公开(公告)号：US4527033A

公开(公告)日：1985-07-02

申请号：US496840

申请日：1983-05-23

Applicant: Junya Matsuyama ,  Akio Kamada ,  Fumimaru Kawabata ,  Tatsufumi Uegaki ,  Shigeru Miyake

Inventor： Junya Matsuyama ,  Akio Kamada ,  Fumimaru Kawabata ,  Tatsufumi Uegaki ,  Shigeru Miyake

IPC: B23K31/00 ,  B23K9/025 ,  C21D9/50 ,  B23K9/02

CPC classification number: B23K9/0253 ,  C21D9/50

Abstract: An improved welding method for welding an inner seam of a longitudinally welded steel pipe along an inner groove by welding electrodes held by a boom which is supported by a tracing roller moving along the inner groove of the steel pipe. According to the invention, at least one metal plate is urged against at least one end of the steel pipe after tack welding the seam on an opposite side of the inner groove of the steel pipe to be welded. Lateral angular deformations of the end of the steel pipe are prevented on both sides of the seam. Such deformations are due to the load of the boom when the tracing roller leaves the end of the steel pipe for the metal plate. Thus, the invention provides for prevention of hot cracking at the end of the pipe. Moreover, according to the invention, portions of the steel pipe on both sides of the distal end of the weld bead, at the end of the pipe, are heated to cause expansion displacements of the heated portions directing toward the center of the weld bead, or high temperature portions of the steel pipe, after a heat source for the seam welding has passed therethrough, are cooled, thereby reducing tearing forces acting upon the weld bead so as to prevent more effectively the hot cracking at the end of the pipe.

Abstract translation: 一种改进的焊接方法，用于通过由沿着钢管的内槽移动的跟踪辊支撑的由悬臂保持的焊接电极焊接沿着内槽的纵向焊接钢管的内缝。 根据本发明，在将要焊接的钢管的内槽的相对侧上定位焊接之后，至少一个金属板被推靠在钢管的至少一端。 在接缝的两侧都防止了钢管端部的横向角变形。 这种变形是由于当跟踪辊离开用于金属板的钢管的端部时起重臂的负载。 因此，本发明提供了防止管道末端的热裂纹。 此外，根据本发明，焊管末端在管末端处的钢管的两侧的部分被加热，从而引起朝向焊道中心的加热部分的膨胀位移， 或者在用于缝焊的热源通过其后的钢管的高温部分被冷却，从而减少作用在焊道上的撕裂力，从而更有效地防止管道末端的热裂纹。

公开(公告)号：US08124247B2

公开(公告)日：2012-02-28

申请号：US12593455

申请日：2008-03-19

Applicant: Naoya Hayakawa ,  Fumimaru Kawabata ,  Shuichi Sakaguchi ,  Mitsuhiro Okatsu ,  Makoto Ota ,  Shigeki Nishiyama ,  Kaoru Nagatani ,  Keito Ishizaki

Inventor： Naoya Hayakawa ,  Fumimaru Kawabata ,  Shuichi Sakaguchi ,  Mitsuhiro Okatsu ,  Makoto Ota ,  Shigeki Nishiyama ,  Kaoru Nagatani ,  Keito Ishizaki

IPC: B32B15/04 ,  B32B15/18 ,  B23K9/18 ,  B23K25/00

CPC classification number: C22C38/02 ,  B23K35/0266 ,  B23K35/0272 ,  B23K35/3066 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  F16L13/02 ,  Y10T428/12292 ,  Y10T428/12965 ,  Y10T428/12972

Abstract: A high-strength steel pipe has a tensile strength of 800 MPa or more and includes a weld metal having high cold-cracking resistance and high low-temperature toughness, wherein the weld metal contains C: 0.04% to 0.09% by mass, Si: 0.32% to 0.50% by mass, Mn: 1.4% to 2.0% by mass, Cu: less than 0.5% by mass, Ni: more than 0.9% by mass but not more than 4.2% by mass, Mo: 0.4% to 1.5% by mass, Cr: less than 0.5% by mass, V: less than 0.2% by mass, and the remainder of Fe and incidental impurities, and CS values calculated from the weld metal components using the equation CS=5.1+1.4[Mo]−[Ni]−[Mn]−36.3[C] are equal to zero or more at both an internal surface and an external surface.

Abstract translation: 高强度钢管的拉伸强度为800MPa以上，并且具有耐寒裂性高，低温韧性高的焊接金属，其中，焊接金属含有C：0.04〜0.09质量％，Si： 0.32〜0.50质量％，Mn：1.4〜2.0质量％，Cu：小于0.5质量％，Ni：0.9质量％以上且4.2质量％以下，Mo：0.4〜1.5 质量％：Cr：小于0.5质量％，V：小于0.2质量％，剩余的Fe和附带的杂质，以及由焊接金属成分使用CS = 5.1 + 1.4 [Mo ] - [Ni] - [Mn] -36.3 [C]在内表面和外表面均等于零或更多。

公开(公告)号：US20100119861A1

公开(公告)日：2010-05-13

申请号：US12593455

申请日：2008-03-19

Applicant: Naoya Hayakawa ,  Fumimaru Kawabata ,  Shuichi Sakaguchi ,  Mitsuhiro Okatsu ,  Makoto Ota ,  Shigeki Nishiyama ,  Kaoru Nagatani ,  Keito Ishizaki

Inventor： Naoya Hayakawa ,  Fumimaru Kawabata ,  Shuichi Sakaguchi ,  Mitsuhiro Okatsu ,  Makoto Ota ,  Shigeki Nishiyama ,  Kaoru Nagatani ,  Keito Ishizaki

IPC: B23K9/18 ,  B21C1/00

CPC classification number: C22C38/02 ,  B23K35/0266 ,  B23K35/0272 ,  B23K35/3066 ,  C22C38/04 ,  C22C38/08 ,  C22C38/12 ,  F16L13/02 ,  Y10T428/12292 ,  Y10T428/12965 ,  Y10T428/12972

Abstract: A high-strength steel pipe having a tensile strength of 800 MPa or more that includes a weld metal having high cold-cracking resistance and high low-temperature toughness is provided. The high-strength steel pipe is a high-strength welded steel pipe in which the welded steel pipe is manufactured by double one layer submerged arc welding performed on an internal surface and an external surface of a base metal, both the base metal of the welded steel pipe and a weld metal have a tensile strength of 800 MPa or more, the weld metal contains C: 0.04% to 0.09% by mass, Si: 0.32% to 0.50% by mass, Mn: 1.4% to 2.0% by mass, Cu: less than 0.5% by mass, Ni: more than 0.9% by mass but not more than 4.2% by mass, Mo: 0.4% to 1.5% by mass, Cr: less than 0.5% by mass, V: less than 0.2% by mass, and the remainder of Fe and incidental impurities, and CS values calculated from the weld metal components using the equation CS=5.1+1.4[Mo]−[Ni]−0.6[Mn]−36.3[C] are equal to zero or more at both the internal surface and the external surface.

Abstract translation: 提供一种抗拉强度为800MPa以上的高强度钢管，其包括耐寒裂纹性高，低温韧性高的焊接金属。 高强度钢管是一种高强度焊接钢管，其中焊接钢管是通过在基体金属的内表面和外表面上进行的双层埋弧焊而制造的，焊接的钢管 钢管和焊接金属的拉伸强度为800MPa以上，焊接金属含有C：0.04〜0.09质量％，Si：0.32〜0.50质量％，Mn：1.4〜2.0质量％ Cu：小于0.5质量％，Ni：大于0.9质量％且不超过4.2质量％，Mo：0.4〜1.5质量％，Cr：小于0.5质量％，V：小于0.2 质量％，剩余的Fe和杂质以及使用CS = 5.1 + 1.4 [Mo] - [Ni] -0.6 [Mn] -36.3 [C]的焊接金属成分计算出的CS值等于 在内表面和外表面上都为零或更多。

公开(公告)号：US06706125B2

公开(公告)日：2004-03-16

申请号：US10018881

申请日：2002-05-06

Applicant: Tatsumi Kimura ,  Yasushi Morikage ,  Keniti Amano ,  Takanori Okui ,  Keizou Taoka ,  Hironori Miura ,  Hiroyuki Ookubo ,  Fumimaru Kawabata

Inventor： Tatsumi Kimura ,  Yasushi Morikage ,  Keniti Amano ,  Takanori Okui ,  Keizou Taoka ,  Hironori Miura ,  Hiroyuki Ookubo ,  Fumimaru Kawabata

IPC: C22C3802

CPC classification number: B21B1/082 ,  C21D8/00 ,  C21D8/0226 ,  C21D9/44 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  Y10T403/32

Abstract: When manufacturing a straight steel section having a joint 2 comprising a ball claw 21 and a curved claw 20 by hot-rolling a bloom vertically symmetrically to make a section blank having a flange 2A at a web 1 end (first step), vertically asymmetrically hot-rolling the section blank to adjust the size of the web and form the flange into a rough joint 2B including a projection 20A (second step), and subjecting the projection to hot bend rolling into a curved claw 20 (third step), wherein the bloom has a chemical composition comprising, in mass percentage, from 0.01 to 0.20% C, up to 0.8% Si, up to 1.8% Mn, up to 0.030% P, and up to 0.020% S; and therein the claw bending start temperature in the third step is a temperature of over Ar3 or up to Ar3-50° C., thereby achieving a depth of wrinkle flaws 10 present on the inner surface side of the curved claw of up to 0.5 mm.

Abstract translation: 当制造具有包括球形爪21和弯曲爪20的接头2的直钢部分时，通过垂直对称地对其进行热轧，以使具有在腹板1端部（第一步骤）的凸缘2A的部分坯料垂直不对称地热 将该区段坯料卷起以调整幅材的尺寸并将法兰形成为包括突起20A（第二台阶）的粗糙接头2B，并将突起热弯曲成弯曲的爪20（第三步骤），其中 其具有质量百分比为0.01〜0.20％，Si：0.8％，Mn：1.8％，P：0.030％，S：0.020％以下的化学组成。 其中，第三步骤中的爪弯曲开始温度为Ar 3以上或Ar 3〜50℃以下的温度，从而形成弯曲爪的内表面侧的皱纹10的深度高达0.5mm 。

公开(公告)号：US06440235B1

公开(公告)日：2002-08-27

申请号：US09641346

申请日：2000-08-18

Applicant: Tatsumi Kimura ,  Fumimaru Kawabata ,  Keniti Amano

Inventor： Tatsumi Kimura ,  Fumimaru Kawabata ,  Keniti Amano

IPC: C21D713

CPC classification number: C22C38/14 ,  C21D8/00 ,  C21D2211/002 ,  C22C38/04 ,  C22C38/12

Abstract: Rolled H-shapes having high strength and high toughness, and which can be produced using cheaper alloy components than conventional products and which can be manufactured with a high productivity, are disclosed. A method for manufacturing the H-shapes is also disclosed. The rolled H-shapes include 0.03 to 0.1 wt. % of Nb and 0.005 to 0.04 wt. % of Ti. The method includes a rough universal rolling process in which an accumulated reduction at a rolling temperature of 950° C. or lower is 5% or larger, and reverse operation is conducted fast; and a finishing universal rolling, in which the rolling temperature is 750° C. or higher. Preferably, in the rough universal rolling, the accumulated reduction at a rolling temperature of 950° C. or lower is 50% or more.

Abstract translation: 公开了具有高强度和高韧性的轧制H形，并且可以使用比常规产品更便宜的合金成分制造并且可以以高生产率制造。 还公开了一种用于制造H形的方法。 轧制的H形包括0.03〜0.1重量％ Nb的含量为0.005〜0.04wt。 ％的Ti。 该方法包括粗轧万能轧制方法，其中在950℃或更低的轧制温度下的累积压下率为5％或更大，并且快速进行反向操作; 以及轧制温度为750℃以上的精轧万能轧制。 优选地，在粗通用轧制中，轧制温度为950℃以下的累积压下率为50％以上。

公开(公告)号：US06436340B1

公开(公告)日：2002-08-20

申请号：US09485265

申请日：2000-02-24

Applicant: Kazuhiko Shiotani ,  Akio Ohmori ,  Kimihiro Nishimura ,  Yasuyoshi Yamane ,  Fumimaru Kawabata ,  Keniti Amano

Inventor： Kazuhiko Shiotani ,  Akio Ohmori ,  Kimihiro Nishimura ,  Yasuyoshi Yamane ,  Fumimaru Kawabata ,  Keniti Amano

IPC: C22C3816

CPC classification number: C22C38/08 ,  C22C38/002 ,  C22C38/04 ,  C22C38/16

Abstract: Steel is obtained which comprises by wt %, C: 0.001-0.025%, Si: not more than 0.60%, Mn: 0.10-3.00%, P: 0.005-0.030%, S: not more than 0.01%, Al: not more than 0.10%, Cu: 0.1-1.5%, Ni: 0.1-6.0%, B: 0.0001-0.0050%, and the balance being Fe and inevitable impurities; since the steel contains C and P in small contents, stable amorphous rusts are formed on the surface thereof at an early stage; and steel simultaneously realizes excellent weather resistance, material weldability and toughness particularly in an environment such as a seashore district and the like where salt is present in a large amount.

Abstract translation: 得到钢，其含量为C：0.001-0.025％，Si：不大于0.60％，Mn：0.10-3.00％，P：0.005-0.030％，S：0.01％以下，Al：不大于 Cu：0.1-1.5％，Ni：0.1-6.0％，B：0.0001-0.0050％，余量为Fe和不可避免的杂质; 由于钢含有少量的C和P，所以在其表面上形成稳定的非晶态锈， 特别是在诸如大量存在盐的海滨区等环境中，钢同时实现了优异的耐候性，材料的焊接性和韧性。

公开(公告)号：US5948183A

公开(公告)日：1999-09-07

申请号：US947388

申请日：1997-10-08

Applicant: Susumu Okada ,  Masahiko Morita ,  Fumimaru Kawabata

Inventor： Susumu Okada ,  Masahiko Morita ,  Fumimaru Kawabata

IPC: C21D8/02 ,  C22C38/02 ,  C22C38/04 ,  C22C38/12 ,  C22C38/14

CPC classification number: C22C38/04 ,  C21D8/0226 ,  C22C38/02 ,  C22C38/12 ,  C22C38/14 ,  C21D2211/002 ,  C21D2211/005

Abstract: The present invention provides a hot-rolled steel sheet having a low yield ratio, a high specific strength, and excellent toughness. The hot-rolled steel sheet comprises: 0.005 to less than 0.030 weight percent of carbon, 1.5 weight percent or less of silicon, 1.5 weight percent or less of manganese, 0.020 weight percent or less of phosphorus, 0.015 weight percent or less of sulfur, 0.005 to 0.10 weight percent of aluminum, 0.0100 weight percent or less of nitrogen, 0.0002 to 0.0100 weight percent of boron, at least one element selected from the group consisting of 0.20 weight percent or less of titanium and 0.25 weight percent or less of niobium in an amount to satisfy (Ti+Nb/2)/C.gtoreq.4, and balance iron and incidental impurities. The metal structure is selected from the group consisting of ferrite and bainitic ferrite. The amount of carbon dissolved in grains ranges from 1.0 to 4.0 ppm. The present invention also provides a method for producing a hot-rolled steel sheet. The method includes hot-rolling a steel slab containing the above components, cooling at a rate of between 5 to not more than 20.degree. C./sec., and then coiling at a temperature ranging from over 550.degree. C. to 700.degree. C.

Abstract translation: 本发明提供一种低屈服比，高比强度，优异的韧性的热轧钢板。 该热轧钢板包括：0.005〜小于0.030重量％的碳，1.5重量％以下的硅，1.5重量％以下的锰，0.020重量％以下的磷，0.015重量％以下的硫， 0.005〜0.10重量％的铝，0.0100重量％以下的氮，0.0002〜0.0100重量％的硼，至少一种选自钛的0.20重量％以下和0.25重量％以下的铌的元素 满足（Ti + Nb / 2）/ C> / = 4的量，并平衡铁和杂质。 金属结构选自铁素体和贝氏体铁素体。 溶解在谷物中的碳的量为1.0至4.0ppm。 本发明还提供一种热轧钢板的制造方法。 该方法包括对含有上述成分的钢板进行热轧，以不超过20℃/秒的速度冷却，然后在550℃〜700℃的温度下卷取 。