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1. 发明公开

EP1297910A4 HIGH-STRENGTH STEEL PIPE EXCELLENT IN FORMABILITY AND BURST CHARACTERISTICS 有权转让
标题翻译：高强度钢管
公开(公告)号：EP1297910A4
公开(公告)日：2006-08-09
申请号：EP01938574
申请日：2001-06-08
申请人： NIPPON STEEL CORP
发明人： TSURU EIJI , HARA TAKUYA , ASAHI HITOSHI , MIYAZAKI HIDEKI , YOSHIDA T
IPC分类号： B21C37/08 , B21C37/30 , F16L9/17
CPC分类号： F16L9/17 , B21C37/08 , B21C37/0811 , B21C37/0815 , B21C37/30 , B23K2201/06 , Y10T29/18
摘要： A method of producing, by a UOE method, a high-strength line pipe-use steel pipe having a steel-sheet strength exceeding 850 N/mm2, the method producing a high-strength line pipe-use steel pipe having excellent formability and burst characteristics that prevent cracks or fractures in a seam-welded portion during a pipe expanding process and eliminate brittle-fracture originating at the seam-welded portion even under an inner-pressure load while the steel pipe is used. A method of producing, by a UOE method, a high-strength steel pipe having a tensile strength exceeding 850 N/mm2, wherein the high-strength steel pipe has excellent formability and burst characteristics such that a ratio (R/r) of an average radius of curvature within a peripheral-direction 120- mm range including the welded portion of the steel pipe before pipe expanding during a pipe expanding process to a steel-pipe radius (r) after pipe expanding is 0.65-2.0 or alternatively a ratio (R/r) to a steel-pipe radius (r) is 0.90-2.0, and the steel pipe has excellent burst characteristics such that Vickers hardness Hv of a base metal, minimum Vickers hardness Hz at the HAZ portion, pipe body wall-thickness t, and welded portion peaking amount d of the steel pipe before pipe expanding during a pipe expanding process satisfy the following relation, (1 + 0.005 t | δ

2. 发明专利

DE60133463T2 未知
公开(公告)号：DE60133463T2
公开(公告)日：2008-12-11
申请号：DE60133463
申请日：2001-06-08
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 , B21C37/30 , F16L9/17
摘要： The present invention provides, in a method of producing such a high-strength steel pipe for line pipe use as to exceed 850 N/mm in tensile strength by a UOE method, a method of producing a high-strength steel pipe for line pipe use, being so excellent in formability and burst resistance as to prevent cracking and a rupture at a seam weld in a pipe expansion process and as not to incur a brittle rupture from a seam weld even when an internal pressure load is imposed during the use of the steel pipe. The present invention is: a high-strength steel pipe excellent in formability and burst resistance, characterized in that, when a high-strength steel pipe exceeding 850 N/mm in tensile strength is produced by a UOE method, the ratio (R/r) of the average radius of curvature in the range of 120 mm in the circumferential direction including the weld of the steel pipe before pipe expansion in a pipe expansion process (R) to the radius of the steel pipe after pipe expansion (r) is 0.65 to 2.0, and further the ratio (R/r) is 0.90 to 2.0; and yet further a steel pipe excellent in burst resistance, characterized in that the Vickers hardness of the base metal Hv, the minimum Vickers hardness at the HAZ Hz, the pipe wall thickness t, and the peaking amount at the weld of the steel pipe before pipe expansion in a pipe expansion process delta satisfy the following expression, (1 + 0.005t delta ) Hz - 25.34Hv + 4712.

3. 发明专利

DE60133463D1 未知
公开(公告)号：DE60133463D1
公开(公告)日：2008-05-15
申请号：DE60133463
申请日：2001-06-08
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 , B21C37/30 , F16L9/17
摘要： The present invention provides, in a method of producing such a high-strength steel pipe for line pipe use as to exceed 850 N/mm in tensile strength by a UOE method, a method of producing a high-strength steel pipe for line pipe use, being so excellent in formability and burst resistance as to prevent cracking and a rupture at a seam weld in a pipe expansion process and as not to incur a brittle rupture from a seam weld even when an internal pressure load is imposed during the use of the steel pipe. The present invention is: a high-strength steel pipe excellent in formability and burst resistance, characterized in that, when a high-strength steel pipe exceeding 850 N/mm in tensile strength is produced by a UOE method, the ratio (R/r) of the average radius of curvature in the range of 120 mm in the circumferential direction including the weld of the steel pipe before pipe expansion in a pipe expansion process (R) to the radius of the steel pipe after pipe expansion (r) is 0.65 to 2.0, and further the ratio (R/r) is 0.90 to 2.0; and yet further a steel pipe excellent in burst resistance, characterized in that the Vickers hardness of the base metal Hv, the minimum Vickers hardness at the HAZ Hz, the pipe wall thickness t, and the peaking amount at the weld of the steel pipe before pipe expansion in a pipe expansion process delta satisfy the following expression, (1 + 0.005t delta ) Hz - 25.34Hv + 4712.

4. 发明专利

JP2008115558A Method of manufacturing steel pipe pile excellent in joint fastening performance, and method of manufacturing steel pipe sheet pile 有权
标题翻译：钢管接头性能优良的钢管制造方法以及制造钢管板的方法
公开(公告)号：JP2008115558A
公开(公告)日：2008-05-22
申请号：JP2006297854
申请日：2006-11-01
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TSURU EIJI , TERAMOTO YASUAKI , MATSUTANI YOSHITAKA , MIYAZAKI HIDEKI , SAKAI TAKAYUKI
IPC分类号： E02D5/28 , B23K9/00 , B23K9/235 , B23K101/04 , E02D5/08
摘要： PROBLEM TO BE SOLVED: To provide a method of manufacturing a steel pipe sheet pile, which contributes to reduction of deformation of a mechanical joint welded to a steel pipe body having an external diameter of 1,000 mm or more, and to prevention of defective joint fitting, when a steel pipe pile or the steel pipe sheet pile is manufactured, to thereby exert excellent joint fastening performance, and to provide a method of manufacturing the steel pipe pile.
SOLUTION: When the mechanical joint is welded to an end of the steel pipe body having a diameter D (mm) of 1,000 mm or more, firstly the mechanical joint is temporarily welded at an interval of a maximum angle θ (97,400/D)° or less with respect to a central axis of the steel pipe body, and thereafter finally welded. At this time, it is preferred that the mechanical joint is temporarily welded to the body at a location at which at least the diameter of the steel pipe body is maximum.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种制造钢管桩桩的方法，其有助于减少焊接到外径为1000mm以上的钢管体的机械接头的变形，并且防止在制造钢管桩或钢管桩桩时，由于发挥良好的接头紧固性能，提供钢管桩的制造方法，因此，解决方案：当将机械接头焊接到直径D（mm）为1000mm以上的钢管体的端部时，首先将机械接头以最大角度θ（97,400 / D）°以下，最后焊接。此时，优选在至少钢管主体的直径为最大的位置将机械接头临时焊接到主体。版权所有（C）2008，JPO＆INPIT

5. 发明专利

JP2003136130A METHOD FOR MANUFACTURING INNER AND OUTER SURFACE SUBMERGED ARC WELDED STEEL PIPE EXCELLENT IN TOUGHNESS CHARACTERISTICS OF SEAM WELDED PORTION 审中-公开
公开(公告)号：JP2003136130A
公开(公告)日：2003-05-14
申请号：JP2001336670
申请日：2001-11-01
申请人： NIPPON STEEL CORP
发明人： ASAHI HITOSHI , HARA TAKUYA , OKITA SHIGERU , SHINADA KOICHI , MORIMOTO YUTAKA , YOSHIDA TATSUYA , MIYAZAKI HIDEKI
IPC分类号： B23K9/18 , B21C37/08 , B23K9/025 , B23K9/23 , B23K9/235 , B23K37/08
摘要： PROBLEM TO BE SOLVED: To provide a steel pipe excellent in toughness characteristics of the welded portion of a high strength steel pipe, especially a tensile strength of 800 MPa or more. SOLUTION: The method for manufacturing the inner and outer surface submerged arc welded steel pipe excellent in toughness characteristics of the seam welded portion is characterized in that a steel plate is formed like a steel pipe and the seam portion is tack-welded, and in the steel pipe manufactured by submerged arc welding from the inner and outer surface, submerged arc welding is performed from the opposite surface against a tack welded portion and after a part of tack welded bead existing inside the groove in the opposite surface against the tack welding is cut and removed, submerged arc welding is performed.

6. 发明专利

JPH06185924A DIMENSION AND PROFILE MEASURING EQUIPMENT FOR STEEL PIPE 失效
公开(公告)号：JPH06185924A
公开(公告)日：1994-07-08
申请号：JP23966392
申请日：1992-09-08
申请人： NIPPON STEEL CORP
发明人： ASANUMA SHINJI , IKUTA MORIKAZU , MIYAZAKI HIDEKI
IPC分类号： G01B5/02 , G01B5/20 , G01B5/207
摘要： PURPOSE:To save manpower in machining work and dimension/profile measuring work without sacrifice of the processing capacity of an end face machining unit by disposing a pipe end position detector on the inside of a rotary face plate, a distance detector at a rotary face plate driving section, and a rotational angle detector at a bearing section. CONSTITUTION:Immediately upon receiving a steel pipe 1 on an end face machining line, a clamp unit 2 clamps the steel pipe 1 and secures the steel pipe 1 in place. An end face machining unit driving section 3 then advances to approach the steel pipe 1 and a pipe end position detector 7 detects an end of the steel pipe 1. In this regard, a relative positional relationship is preset between a cutter fixed to a cutter base 5 on a rotary face plate 4 and the pipe end position detector 7 in order to grasp positional relationship required for the cutter base 5 to approach an optimal end position of the steel pipe 1 and for switching to a cutting speed at a cutting start position. Subsequently, cutting is started and the dimensions and the profile of the steel pipe 1 are measured while cutting the steel pipe 1.

7. 发明专利

JPS6013671A FEED-HOPPER FOR POWDERED AND GRANULAR BODY 失效
公开(公告)号：JPS6013671A
公开(公告)日：1985-01-24
申请号：JP11698383
申请日：1983-06-30
申请人： NIPPON STEEL CORP , NIPPON STEEL WELDING PROD ENG
发明人： OBINATA SHIZUO , SUGITA RIYOUSUKE , KIYOMIYA KAZUYOSHI , MIYAMAE TAKESHI , MIYAZAKI HIDEKI
IPC分类号： B65G69/10 , B65D88/70

8. 发明专利

JPS59225898A ATTACHING METHOD OF TAB PLATE IN PRODUCTION OF UO STEEL PIPE 失效
公开(公告)号：JPS59225898A
公开(公告)日：1984-12-18
申请号：JP10022783
申请日：1983-06-07
申请人： NIPPON STEEL CORP
发明人： IKUTA MORIKAZU , MIYAZAKI HIDEKI
IPC分类号： B23K9/025 , B23K31/02 , B23K31/06 , B23K31/00 , B23K37/06
摘要： PURPOSE:To improve the regular welding quality at the end of a UO steel pipe in the stage of welding tab plates to four corners of a plate prior to pressing in production of said pipe by inclining the tab plates so as to maintain a specified distance from the bottom surface of the plate then attaching the tab plates. CONSTITUTION:A plate 1 for producing a UO steel pipe is formed to a tubular shape by C, U, O forming and after the joint thereof is tack-welded, the joint is subjected to regular welding from the inside and outside surfaces, thereby producing a UO steel pipe. A bevel is formed to the raw material plate 1 in such a case and tab plates 2 are welded to the parts to form both ends of the pipe prior to O forming and normal welding. The plates 2 are inclined toward the bottom surface of the plate 1 and are so attached that the degree alpha of inclination in attaching is

9. 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).

10. 发明专利

JPH04115104A APPARATUS FOR DETECTING GROOVE POSITION FOR AUTOMATIC PIPE WELDING 失效
公开(公告)号：JPH04115104A
公开(公告)日：1992-04-16
申请号：JP23609990
申请日：1990-09-05
申请人： KANSAI TEC KK , NIPPON STEEL CORP
发明人： KAWAHARA MAMORU , KOE HARUO , MIYAZAKI HIDEKI
IPC分类号： G01B11/00 , B23K9/127
摘要： PURPOSE:To make it possible to ensure high-quality welding by providing a fan-shape light projector, an image sensing device, a pipe-surface-position computing device and a groove-position computing device, and automating a seam welding step for a pipe. CONSTITUTION:This fan-shape light projector 1 comprises one light projector 1 which can project fan-shaped light having the emitting angle suitable for positions (a) and (b) or at least two light projectors 1 and 1' having the slightly different light projecting directions. The emitting angle can be changed with the light projector 1 so as to cope with the case wherein the distances to the image pickup positions such as (a) and (b) from an image sensing device 4 are different. The state wherein the apparatus is used at a position where distance to the image sensing device is long is made to be the light projecting state 1a. The other case is made to be 1b. The image sensing device 4 picks up the shape of the cross section of a groove part 3 by the optical cutting method using the slit light from the light projector 1. The picked-up image is transferred into a pipe-surface-position computing device 5 and a groove-edge- position computing device 6 as a video signal.

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