公开(公告)号：BRPI1009989A2

公开(公告)日：2016-03-15

申请号：BRPI1009989

申请日：2010-03-31

Applicant: JFE STEEL CORP

Inventor： SATO AKIO ,  NAKAGAWA KINYA ,  SUZUKI KOJI ,  SONOBE OSAMU ,  TOYODA SHUNSUKE ,  KAWABATA YOSHIKAZU ,  HASHIMOTO YUJI

IPC: B21D53/88 ,  B60G9/04

公开(公告)号：CA2656637C

公开(公告)日：2013-08-20

申请号：CA2656637

申请日：2007-06-19

Applicant: JFE STEEL CORP

Inventor： TOYODA SHUNSUKE ,  ARATANI MASATOSHI ,  KAWABATA YOSHIKAZU ,  HASHIMOTO YUJI ,  SUZUKI KOJI ,  SAKATA KEI ,  GUNJI MAKIO ,  SATO AKIO ,  SAWAKI TETSURO

IPC: C22C38/14 ,  B21C37/08 ,  C21D8/10 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/12 ,  C22C38/16 ,  C22C38/28 ,  C22C38/38 ,  C22C38/50 ,  C22C38/58

Abstract: The following tube and method are provided: a high-tensile strength welded steel tube having excellent formability and torsional fatigue endurance after being formed into cross-sectional shape and then stress-relief annealed and a method of producing the tube. A steel material used has a composition which contains C, Si, Al, 1.01% to 1.99% Mn, 0.041% to 0.150% Ti, 0.017% to 0.150% Nb, P, S, N, and O such that the sum of the content of Ti and that of Nb is 0.08% or more, the content of each of C, Si, and Al being within an appropriate range, the content of each of P, S, N, and O being adjusted to a predetermined value or less. The steel material is subjected to a hot-rolling step in which the heating temperature and finish-rolling final temperature of the steel material are each within an appropriate range, is slow cooled at a temperature of 650°C to 750°C for 2 s or more, and is then coiled at a temperature of 510°C to 660°C, whereby a hot-rolled steel strip is obtained. The hot-rolled steel strip has a microstructure containing 60 volume percent or more of a ferrite phase which has an average grain size of 2 µm to 8 µm and which contains a precipitate of a (Nb, Ti) composite carbide having an average grain size of 2 nm to 40 nm. The hot-rolled steel strip is subjected to an electrically welded tube-making step in which the width reduction of the strip is 10% or less, whereby a welded steel tube is obtained. This allows the high-tensile strength welded steel tube to have a large yield strength of greater than 660 MPa, excellent low-temperature toughness, excellent formability, and excellent torsional fatigue endurance after being stress-relief annealed.

公开(公告)号：RU2719767C1

公开(公告)日：2020-04-23

申请号：RU2019140363

申请日：2018-05-29

Applicant: JFE STEEL CORP

Inventor： ISHIGURO YASUHIDE ,  SATO AKIO ,  SAKASHITA SHIGETO

IPC: H01L39/04 ,  H01B12/14

Abstract: Предлагаетсятеплоизолированнаямногослойнаятрубадляпередачиэлектроэнергиив условияхсверхпроводимости, котораяв высокойстепенипрепятствуетпроникновениювнешнеготеплав результатеизлученияи имеетпревосходныетеплоизоляционныесвойствабезиспользованиясверхмощнойизоляции. Теплоизолированнаямногослойнаятрубадляпередачиэлектроэнергиив условияхсверхпроводимостисодержитсверхпроводящийкабельи многослойнуютрубу, вкоторойпомещенсверхпроводящийкабель, причеммногослойнаятрубасостоитизмножествапрямолинейныхтруби поменьшеймереоднаизмножествапрямолинейныхтрубсодержитнаповерхностислойпокрытияизцинкаилицинковогосплава, имеющийсреднийразмерблесток 2,0 ммилименее. Изобретениев значительнойстепенипрепятствуетпроникновениювнешнеготеплав результатеизлученияи имеетпревосходныетеплоизоляционныесвойствабезиспользованиясверхмощнойизоляции. 1 з.п. ф-лы, 2 ил., 2 табл.

公开(公告)号：JP2013152019A

公开(公告)日：2013-08-08

申请号：JP2012285183

申请日：2012-12-27

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： MIYATA SHIRO ,  IKEDA YUKIHIRO ,  SATO AKIO

IPC: F16L58/10 ,  B21H3/02 ,  B32B1/08 ,  B32B15/085 ,  C23C22/07 ,  F16L9/02

Abstract: PROBLEM TO BE SOLVED: To provide a steel tube with polyethylene powder lining having excellent form rolling workability in which any excessive diameter reduction occurs during the form rolling, and the fitting property to a tube end anti-corrosion joint is improved.SOLUTION: In the steel tube with a polyethylene powder lining, a powder polyethylene resin layer is coated on an inner surface of the steel tube via a chemical-converted film and liquid primer. The yield strength of the steel tube is ≤250N/mm, and the average film thickness of the liquid primer after the drying is in a range of 10-30 μm. The film thickness of the powder polyethylene resin layer is ≤1.0 mm, and the form rolling thread workability thereof is excellent.

Abstract translation: 要解决的问题：提供一种具有优良成型轧制加工性的聚乙烯粉末衬里的钢管，其中在成形轧制过程中发生任何过度的直径减小，并且提高了对管端防腐接头的装配性能。解决方案：在 具有聚乙烯粉末衬里的钢管，通过化学转化的膜和液体底漆在钢管的内表面上涂覆粉末聚乙烯树脂层。 钢管的屈服强度≤250N/ mm，干燥后的液体底漆的平均膜厚在10〜30μm的范围内。 粉末状聚乙烯树脂层的膜厚≤1.0mm，成形滚丝加工性优异。

公开(公告)号：JP2012246548A

公开(公告)日：2012-12-13

申请号：JP2011120591

申请日：2011-05-30

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： TOYODA SHUNSUKE ,  YOKOYAMA HIROYASU ,  OKABE YOSHITOMO ,  KIMURA HIDETO ,  INOUE TOSHIHIRO ,  SATO AKIO ,  SUZUKI MASAHITO

IPC: C22C38/00 ,  B21C37/08 ,  B23K13/00 ,  B23K13/02 ,  C21D9/08 ,  C21D9/50 ,  C22C38/06 ,  C22C38/58

Abstract: PROBLEM TO BE SOLVED: To provide an electric resistance welded steel pipe which has excellent HIC (hydrogen induced cracking) resistance and low-temperature toughness in an electric resistance welded part and has a tensile strength of 434 MPa or more, and to provide a method for manufacturing the electric resistance welded steel pipe.SOLUTION: In the electric resistance welded steel pipe, the total amount of Si, Mn, Al, Ca and Cr included in inclusions present in an electric resistance welded part and having a circle-equivalent diameter of 20 μm or more is 20 ppm or less by mass%. The electric resistance welded steel pipe contains predetermined amounts of C, Si, Mn, Al, or further contains Ca and Cr. The above conditions can be achieved by electric resistance welding in an atmosphere in which an oxygen content is adjusted to (1,000/foxy) ppm or less (where foxy is defined by foxy=Mn+10(Si+Cr)+100Al+1,000Ca); or achieved by roll-forming a steel strip to impart a groove having a tapered part at the end of the strip from the inner surface of the pipe or from the outer surface of the pipe to a position corresponding to 10 to 60% of the pipe thickness in the thickness direction, the tapered part having an inclination average angle satisfying from 10×log(foxy) to 40×log(foxy); or achieved by combining the both processes.

Abstract translation: 要解决的问题：提供一种在电阻焊接部中具有优异的HIC（氢诱发开裂）性和低温韧性的电阻焊钢管，其拉伸强度为434MPa以上，并且为 提供一种制造电阻焊钢管的方法。 解决方案：在电阻焊钢管中，存在于电阻焊接部分中并且圆当量直径为20μm或更大的夹杂物中包含的Si，Mn，Al，Ca和Cr的总量为20 ppm以下。 电阻焊钢管含有预定量的C，Si，Mn，Al，或者还含有Ca和Cr。 上述条件可以通过在将氧含量调节至（1,000 / foxy）ppm以下的气氛中进行电阻焊接（通过foxy = Mn + 10（Si + Cr）+ 100Al + 1,000Ca ）; 或通过轧制钢带来实现，从而从管的内表面或从管的外表面向管的端部具有锥形部分的凹槽到对应于管道的10％至60％的位置 厚度方向上的厚度，锥形部分具有满足10×log（foxy）至40×log（foxy）的倾斜平均角度; 或通过组合这两个过程来实现。 版权所有（C）2013，JPO＆INPIT

公开(公告)号：JP2010253552A

公开(公告)日：2010-11-11

申请号：JP2010061753

申请日：2010-03-18

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： HASHIMOTO YUJI ,  TOYODA SHUNSUKE ,  NAKAGAWA KINYA ,  SUZUKI KOJI ,  KAWABATA YOSHIKAZU ,  SONOBE OSAMU ,  SATO AKIO

IPC: B21D53/88 ,  B60G9/04

CPC classification number: B21D53/88 ,  B21D9/15 ,  B21D11/02 ,  B21D17/02 ,  B21D22/025 ,  B60G21/051 ,  B60G2206/30 ,  B60G2206/80 ,  Y10T29/49622

Abstract: PROBLEM TO BE SOLVED: To provide a means which can improve the fatigue strength of an ear portion that is a fatigue high-risk portion of a torsion beam substantially without causing a disadvantage in terms of productivity and cost. SOLUTION: In molding a pipe body 1 to form a torsion beam, a part of the pipe body is squashed in a radial direction to form the cross section of a substantially U shape. A tensile-side bending strain of 2 to 6% is applied to an ear portion 2 in the longitudinal direction of the pipe by bending a bottom line 3 so as to become a belly side. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种可以提高作为扭转梁的疲劳高风险部分的耳部的疲劳强度的手段，基本上不会导致生产率和成本方面的缺点。 解决方案：在模制管体1以形成扭转梁时，管体的一部分在径向上被挤压以形成大致U形的横截面。 通过弯曲底线3以使其成为腹侧，将拉伸侧弯曲应变为2〜6％施加到耳部2的纵向。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2010099738A

公开(公告)日：2010-05-06

申请号：JP2009217528

申请日：2009-09-18

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： SHINGU TOYOHISA ,  SUZUKI KOJI ,  SONOBE OSAMU ,  HASHIMOTO YUJI ,  IKEDA TOMOMASA ,  SATO AKIO

IPC: B21D26/033 ,  B21D26/041 ,  B21D35/00

Abstract: PROBLEM TO BE SOLVED: To solve a problem that it is difficult to obtain a formed article of deformed cross-section with high dimensional accuracy excellent in spot weldability in a conventional technology for forming deformed cross-section.
SOLUTION: Crushing work is carried out on a tubular material 10 with a tensile strength (TS) of ≥590 MPa by a die of deformed cross-section having at least one flat part A1 on the surface thereof in a state that inner pressure is not loaded or in a state that an inner pressure of ≤50 MPa is loaded on it by liquid. Subsequently an inner pressure with a maximum inner pressure of ≥P
min [MPa] is loaded by the liquid to form the tubular material into a deformed cross-section shape, wherein P
min =0.045×TS.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题为了解决在用于形成变形横截面的现有技术中难以获得具有良好的点焊性的高尺寸精度的变形横截面的成形制品的问题。 解决方案：在具有≥590MPa的拉伸强度（TS）≥590MPa的管状材料10上，通过具有至少一个平坦部分A1的变形横截面的模具在内部进行破碎作业 压力未被装载，或处于以液体载置在其内压≤50MPa的状态。 随后，通过液体加载具有≥P min [MPa]的最大内部压力的内部压力，以将管状材料形成为变形的横截面形状，其中P min = 0.045×TS。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2010099737A

公开(公告)日：2010-05-06

申请号：JP2009217519

申请日：2009-09-18

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： SHINGU TOYOHISA ,  SUZUKI KOJI ,  SONOBE OSAMU ,  HASHIMOTO YUJI ,  IKEDA TOMOMASA ,  SATO AKIO

IPC: B21D26/033 ,  B21D26/041 ,  B21D51/16

Abstract: PROBLEM TO BE SOLVED: To provide a method of obtaining a formed article of deformed cross-section with high dimensional accuracy excellent in spot weldability. SOLUTION: Crushing work is carried out on a tubular material 10 with a tensile strength (TS) of ≥690 MPa by a die 1 of deformed cross-section having at least one flat part A1 on the surface thereof in a state that inner pressure is not loaded or in a state that an inner pressure of ≤50 MPa is loaded on it by liquid. Subsequently an inner pressure of >50 MPa is loaded by the liquid and the tubular material is formed into a deformed cross-section shape, wherein forming is carried out so as to allow a perimeter increase rate after forming to be ≥A% and ≤11.0%, where A=4.167×10 -3 ×(TS-590). COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供一种以点焊性优异的高尺寸精度获得变形横截面成形品的方法。 解决方案：通过在其表面上具有至少一个平坦部分A1的变形横截面的模具1在具有≥690MPa的拉伸强度（TS）的管状材料10上进行破碎作业， 内部压力未被装载，或在内部压力≤50MPa的状态下被液体装载。 随后，通过液体加载> 50MPa的内压，并且将管状材料形成为变形的横截面形状，其中进行成形以使成形后的周边增加率为≥A％且≤11.0 ％，其中A = 4.167×10 -3 ×（TS-590）。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009241079A

公开(公告)日：2009-10-22

申请号：JP2008087453

申请日：2008-03-28

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： SAITO OSAMU ,  SATO AKIO ,  GUNJI MAKIO ,  KOIDE TATSUO ,  OKABE YOSHITOMO

IPC: B21C37/08 ,  B23K13/00

Abstract: PROBLEM TO BE SOLVED: To provide a method of manufacturing an electric resistance welded steel pipe by which defects in a seamed part which are generated by the generation of a spark are reduced. SOLUTION: The period of time when both end faces which are heated to a prescribed temperature with a work coil are exposed to the air is set to be ≤0.07 s and a shape angle is set to be ≥ 3.3°. COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 解决的问题：提供一种制造电阻焊钢管的方法，由此产生火花产生的缝合部分的缺陷减小。 解决方案：将工件线圈加热到规定温度的两个端面暴露在空气中的时间段设定为≤0.07s，形状角度设定为≥3.3°。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2014079805A

公开(公告)日：2014-05-08

申请号：JP2012271271

申请日：2012-12-12

Applicant: Jfe Steel Corp ,  Jfeスチール株式会社

Inventor： IKEDA YUKIHIRO ,  NISHINO KATSUHIKO ,  SATO AKIO ,  URAHATA EIICHI

IPC: B21C37/06 ,  B21D41/02 ,  B23K13/00 ,  B23K20/00

Abstract: PROBLEM TO BE SOLVED: To provide an improvement method, whereas, in a butt-welded steel tube manufactured by a conventional technology, a joint planar state or a crack prevention effect during flare processing is insufficient yet.SOLUTION: A slit steel strip is heated by a heater, then heated by an induction heating apparatus, and further just before a steel strip width end is pressure-welded and forge-welded, a mixture gas formed by mixing oxygen and air and having an oxygen concentration of 22-30% near the steel strip end is sprayed onto the steel strip end. Thereafter, each steel strip width end is allowed to butt each other, and forge welding is applied thereto so that a length 12 in the joint thickness direction becomes longer than a tube thickness 13.

Abstract translation: 要解决的问题：提供一种改进方法，而在通过常规技术制造的对焊钢管中，在火炬加工期间的接合平面状态或防裂效果不足。解决方案：将狭缝钢带加热 通过加热器，然后通过感应加热装置加热，并且在钢带宽度端被压焊和锻造焊接之前，通过将氧气和空气混合并且具有22-30％的氧浓度形成的混合气体 将钢带端部喷涂到钢带端部。 然后，使各钢带宽度端部彼此对接，并施加锻造焊接，使得接头厚度方向的长度12比管厚度13长。