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31. 发明专利

JP2007210023A High strength welded steel pipe having excellent weld zone embrittlement crack property 有权
标题翻译：高强度焊接钢管，具有优异的焊接区域破裂性能
公开(公告)号：JP2007210023A
公开(公告)日：2007-08-23
申请号：JP2006035060
申请日：2006-02-13
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI
IPC分类号： B23K31/00 , B21C37/08 , B21C37/30 , B23K9/02 , B23K9/025 , B23K9/18 , B23K9/23 , B23K35/30 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method with which horizontal cracks caused by hydrogen produced in the seam weld zone of a high strength welded steel pipe having a tensile strength of ≥850 MPa and subjected to seam welding from the inside and outside faces are prevented.
SOLUTION: In the method for producing a welded steel pipe having excellent embrittlement crack properties in a weld metal, and in a method for producing a welded steel pipe where a steel plate having a tensile strength of ≥850 MPa is cylindrically formed, and the butted parts are subjected to submerged-arc welding from the inside and outside faces, the height in the thickness direction of the weld metal is reduced by 0.2 to 10% over the whole length in a welding direction.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种在高强度焊接钢管的焊缝区域产生的氢气产生的水平裂纹的方法，该高压焊接钢管的拉伸强度为≥850MPa，并且从内部和外部进行了缝焊面部被阻止。解决方案：在焊接金属中具有优异的脆性裂纹性能的焊接钢管的制造方法中，以及对具有拉伸强度≥850MPa的钢板进行圆筒形成的焊接钢管的制造方法中，并且对接部件从内侧面和外侧面进行埋弧焊接，焊接金属的厚度方向的高度在焊接方向的整个长度上减小0.2〜10％。版权所有（C）2007，JPO＆INPIT

32. 发明专利

JP2005288513A Liquid phase diffusion-bonded joint of steel tube having excellent buckling property and bonding method therefor 审中-公开
标题翻译：具有优良钻孔性能的钢管液相扩散接合点及其结合方法
公开(公告)号：JP2005288513A
公开(公告)日：2005-10-20
申请号：JP2004109251
申请日：2004-04-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SHINOHARA YASUHIRO , TSURU EIJI , HASEGAWA HIROSHI , ASAHI HITOSHI
IPC分类号： B23K20/00 , B23K101/06
摘要： PROBLEM TO BE SOLVED: To provide a liquid phase diffusion-bonded joint of steel tubes with a hollow shape, and to provide a bonding method therefor.
SOLUTION: The liquid phase diffusion-bonded joint of steel tubes having excellent buckling properties is the one with an outer diameter D (mm) and a thickness t (mm), in which the width W0 of the region having yield strength higher than that of the base metal is ≥2t, further, in the heat affected zone of the materials to be bonded, the part whose yield strength is lower than that of the materials to be bonded is present, its width is larger than W0 and lower than D/2, and also, the heat-affected zone where the lowest yield strength is ≥0.8 times the yield strength of the materials to be bonded is provided.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供具有中空形状的钢管的液相扩散接合接头，并提供其接合方法。解决方案：具有优异的屈曲性能的钢管的液相扩散接合是具有外径D（mm）和厚度t（mm）的钢管，其中屈服强度较高的区域的宽度W0 比基体金属≥2t，另外在待接合材料的热影响区，屈服强度低于待结合材料的部分存在，其宽度大于W0，较低提供了比D / 2更高的热影响区，屈服强度最低屈服强度≥0.8倍的热影响区。版权所有（C）2006，JPO＆NCIPI

33. 发明专利

JP2005279748A Iron-based amorphous alloy foil for joining 有权
标题翻译：用于加工的基于铁的非晶合金箔
公开(公告)号：JP2005279748A
公开(公告)日：2005-10-13
申请号：JP2004099770
申请日：2004-03-30
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SATO YUICHI , SAKAMOTO HIROAKI , HASEGAWA HIROSHI , TSURU EIJI , SHINOHARA YASUHIRO
IPC分类号： B23K35/30 , B23K35/40 , C22C45/02
摘要： PROBLEM TO BE SOLVED: To provide iron-based amorphous alloy foil for joining, a foil that can enhance toughness while a high tensile strength is maintained by improving a joining layer through optimization of the alloy composition of joining materials.
SOLUTION: The iron-based alloy for joining is characterized in that it contains, in atomic %, ≤6-20% B, ≤0.1-4% C,
摘要翻译：要解决的问题：为了提供用于接合的铁基非晶合金箔，可以通过优化接合材料的合金组成来改善接合层，从而提高韧性，同时保持高的拉伸强度的箔。＆lt; P＆gt;解决方案：用于接合的铁基合金的特征在于，其原子％含有≤6-20％B，≤0.1-4％C，<0.01-0.1％P，余量Fe不可避免杂质。通过另外含有<2％Si或进一步含有至少一种≤0.1-20％Cr和≤0.1-10％V的铁接合的铁基非晶合金箔。根据本发明，通过改善材料接合层，与贱金属的比例，拉伸强度超过1.0时，可以稳定地获得高接合强度，0℃下的吸收能量显示≥80J。因此，可以在不损害接合材料的特性的情况下以低成本进行接合。版权所有（C）2006，JPO＆NCIPI

34. 发明专利

JP2004148384A Manufacturing method of uoe steel tube having excellent seam welding strength characteristic and internal pressure fatigue characteristic 有权
公开(公告)号：JP2004148384A
公开(公告)日：2004-05-27
申请号：JP2002318082
申请日：2002-10-31
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , TERADA YOSHIO
IPC分类号： B21C37/08 , B23K31/00 , C21D7/06
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a UOE steel tube of excellent seam welding strength characteristic and internal pressure fatigue characteristic for stabilizing the strength of a seam-welded portion and a HAZ of the high strength UOE steel tube, and enhancing the internal pressure fatigue strength of the UOE steel tube for general purpose use.
SOLUTION: In a UOE steel tube manufacturing method in which a steel plate is successively subjected to C-forming, U-forming, and O-forming, end portions of the steel plate are seam-welded to each other, and a tube is expanded, at least a seam-weld toe portion after the expansion is subjected to peening by the ultrasonic vibration.
COPYRIGHT: (C)2004,JPO

35. 发明专利

JP2004114157A Alloy for ferrous joining 有权
公开(公告)号：JP2004114157A
公开(公告)日：2004-04-15
申请号：JP2003310687
申请日：2003-09-02
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SATO YUICHI , SAKAMOTO HIROAKI , HASEGAWA HIROSHI , TSURU EIJI , SHINOHARA YASUHIRO
IPC分类号： B23K20/00 , B23K35/30
摘要： PROBLEM TO BE SOLVED: To provide a joining alloy that can improve joining strength by optimizing the alloy composition of a joining material and thereby improving a joining layer.
SOLUTION: The alloy contains, in atomic %, 6-16% B, 1-20% P, and the balance Fe and inevitable impurities. In addition, the alloy contains at least one kind out of less than 2% each Si and C and at least one kind out of 0.1-20% Ni, 0.1-20% Cr, and 1-10% V. Consequently, a high joining strength exceeding 1.0 at the ratio to the base material can be stably obtained, thereby enabling to perform joining without impairing the characteristics of the materials to be joined.
COPYRIGHT: (C)2004,JPO

36. 发明专利

JP2003342639A Process for manufacturing uoe steel pipe showing excellent crushing strength 有权
标题翻译：制造UOE钢管的工艺表现出优异的冲裁强度
公开(公告)号：JP2003342639A
公开(公告)日：2003-12-03
申请号：JP2002151008
申请日：2002-05-24
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , ASAHI HITOSHI
IPC分类号： B05D7/14 , B21C37/08 , B21D5/01 , C21D9/08 , C21D9/50
摘要： PROBLEM TO BE SOLVED: To provide a process for manufacturing a steel pipe for a line pipe through UOE process wherein crushing strength under an external pressure can be remarkably improved.
SOLUTION: In the process for manufacturing the steel pipe through UOE process, after pipe expansion, the outer and inner surfaces of the steel pipe are each subjected to heat treatment satisfying the formula: T
1 -503≥-37.6×lnt
1 (wherein T
1 is a heating temperature (°C) for heating the outer surface; and t
1 is a heating period (s) for heating the outer surface) and the formula: T
2 -407≥-31.3×lnt
2 (wherein T
2 is a heating temperature (°C) for heating the inner surface; and t
2 is a heating period (s) for heating the inner surface), respectively.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种通过UOE工艺制造用于管线管的钢管的方法，其中可以显着提高在外部压力下的抗碎强度。
解决方案：在通过UOE工艺制造钢管的过程中，在管膨胀之后，钢管的外表面和内表面各自经受满足以下公式的热处理：T 1 503≥-37.6×lnt 1 （其中T 1 是用于加热外表面的加热温度（℃）; t 1 用于加热外表面的加热周期）和公式：T 2 -407≥-31.3×lnt 2 （其中T SB> 2 是用于加热内表面的加热温度（℃），t 2 分别是用于加热内表面的加热周期）。版权所有（C）2004，JPO

37. 发明专利

JP2002346629A METHOD FOR PRODUCING HIGH-STRENGTH STEEL PIPE HAVING SUPERIOR BURST CHARACTERISTICS 失效
公开(公告)号：JP2002346629A
公开(公告)日：2002-12-03
申请号：JP2001163306
申请日：2001-05-30
申请人： NIPPON STEEL CORP
发明人： TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , MIYAZAKI HIDEKI , YOSHIDA TATSUYA
IPC分类号： B21C37/08 , B21D5/01
摘要： PROBLEM TO BE SOLVED: To provide a method for, in a UOE type production method of a high-strength pipe-line steel pipe having a strength exceeding 900 N/mm , producing the steel pipe superior to the burst characteristics and capable of preventing a seam-weld from bursting caused by an inner pressure load. SOLUTION: In the UOE type production method of the high-strength steel pipe having a tensile strength exceeding 900 N/mm , the steel pipe production method provides superiority in the burst characteristics such that the Vickers hardness Hv of a parent material, minimum Vickers hardness Hz at HAZ part, wall thickness t of the pipe and a weld peaking volume δ after an expansion process of the pipe satisfy the relationship expressed in the following equation (1): (1+0.005t|δ|)Hz -25.34 Hv+4712...(1).

38. 发明专利

JPH11223284A PIPE JOINT 失效
公开(公告)号：JPH11223284A
公开(公告)日：1999-08-17
申请号：JP32217098
申请日：1998-11-12
申请人： NIPPON STEEL CORP
发明人： MARUYAMA KAZUSHI , NAGAYOSHI HARUYUKI , TSURU EIJI
IPC分类号： F16L15/04
摘要： PROBLEM TO BE SOLVED: To quickly and easily screw in a tapered male screw part having single thread or a multiple thread directly from the position of a tapered female screw part where the male screw is inserted. SOLUTION: In a pipe joint 10a for screwing in a pin having a tapered male screw part 11a formed in the outer peripheral surface of the tip part of a pipe 16a and a box having a tapered female screw part 12a formed in the inner peripheral surface of the tip part of the same so as to be engaged with the tapered male screw part 11a, the thread crest surface 14a of the male screw thread 13a of the tapered male screw part 11a and the thread crest surface 22a of the female screw thread 17a of the tapered female screw part 12a have specified widths like a square thread, a trapezoidal screw, or a buttress screw, and both thread crest surfaces 14a and 22a are inclined in a direction opposite the tapered surface T of a screw row with respect to a surface D parallel to a pipe axis.

39. 发明专利

JPH11173471A SCREW JOINT FOR STEEL PIPE 失效
公开(公告)号：JPH11173471A
公开(公告)日：1999-06-29
申请号：JP33888997
申请日：1997-12-09
申请人： NIPPON STEEL CORP
发明人： TSURU EIJI , MARUYAMA KAZUSHI , NAGAYOSHI HARUYUKI
IPC分类号： F16L15/00
摘要： PROBLEM TO BE SOLVED: To improve a self-repairing function for an oil well pipe screw joint using a solid lubricating film instead of compound grease when its film is damaged. SOLUTION: In a screw joint for engaging a pin 1 having a male thread and a sealing surface in its outer surface with a box 2 having a female thread and a sealing surface corresponding to those of the pipe 1 in its pipe inner surface respectively, a solid lubricating film 5 is formed in which molybdenum disulfide or tungsten disulfide is mixed so as to be dispersed in the metallic contacting surface of either one of the pin 1 and the box 2, and a phosphate film is formed in the other surface.

40. 发明专利

JPH1194142A CLAD STEEL PIPE JOINT 失效
公开(公告)号：JPH1194142A
公开(公告)日：1999-04-09
申请号：JP25515997
申请日：1997-09-19
申请人： NIPPON STEEL CORP
发明人： MARUYAMA KAZUSHI , YAMAMOTO SHUJI , SAKAMOTO TOSHIHARU , TSURU EIJI
IPC分类号： F16L15/04
摘要： PROBLEM TO BE SOLVED: To provide excellent sealing performance by fitting a box with a shoulder part and a metal contact face formed to correspond to the tip shape of a pipe body, to the outside of the pipe body having two shoulder parts arranged stepwise at an unthreaded tip part, and its intermediate part formed of a metal contact face. SOLUTION: A tapered external thread is formed at one end of a pipe body (pin) 1, and two shoulder parts 5, 6 are formed at the tip part. A part between both shoulder parts 5, 6 is formed as a metal contact part 4. An internal thread 3' to be fitted to the external thread 3 is formed at a double-pipe box 2 for connecting the pins 1, 1 to each other, and a shoulder part 5' and a metal contact part 4' corresponding to external thread tip shape are also formed at the double-pipe box 2. After disposing inner surface clad corrosion resistant material 8 at an external thread tip part, thread fastening is performed. The tip metal contact faces 4, 4' are therefore brought into contact with each other to form a first sealing surface. Fastening is continued, and the shoulder parts 5, 5' are brought into abutting contact in a final stage of fastening to form a second sealing surface.

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