公开(公告)号：EP3132879A4

公开(公告)日：2017-04-26

申请号：EP15780550

申请日：2015-04-15

Applicant: JFE STEEL CORP

Inventor： HAYAKAWA NAOYA ,  TAMURA YUKUYA ,  MORIMOTO YUTA

IPC: B23K9/173 ,  B21C37/08 ,  B23K9/025 ,  B23K9/032 ,  B23K9/235 ,  B23K101/06

CPC classification number: B21C37/08 ,  B23K9/0253 ,  B23K9/0325 ,  B23K9/173 ,  B23K9/235 ,  B23K2201/06

Abstract: Provided is a tack welding method that, in welding of a large-diameter welded steel pipe or tube, enables an increase in welding speed while preventing humped beads, burn through, and incomplete fusion. In the tack welding method, tack welding is performed continuously on edges (1a) of an open pipe or tube (1) in a production process for a large-diameter welded steel pipe or tube. The tack welding is performed by gas metal arc welding in which a welding current of 1000 A or greater is supplied to a solid welding wire (3) of 4.8 mm or greater in diameter that is attached to contact tip (2), while maintaining a distance of 25 mm or greater between an outer surface of the edges (1a) and a lower end of the contact tip (2).

Abstract translation: 本发明提供一种粘性焊接方法是，在大直径的焊接钢管的焊接，能够增加在焊接速度，同时防止隆起珠，烧穿，和未熔合。 在点焊方法，点焊是在生产过程中连续地执行在一个开放的管或管（1）的边缘（1a），用于大直径的焊接钢管。 钉焊接通过气体金属电弧在哪个焊接1000或更大的焊接电流被提供给实心焊丝（3）为4.8毫米或更大的直径并连接到接触尖端（2）进行的，同时保持 的在边缘处的外表面（1a）的25mm或更大之间的距离和接触尖端的下端（2）。

公开(公告)号：EP2255915A4

公开(公告)日：2014-08-13

申请号：EP09713534

申请日：2009-02-19

Applicant: JFE STEEL CORP

Inventor： ISHIGAMI ATSUSHI ,  OI KENJI ,  HAYAKAWA NAOYA

IPC: B23K9/18 ,  B23K9/00 ,  B23K9/025 ,  B23K9/032 ,  B23K101/06

CPC classification number: B23K9/188 ,  B23K9/0253 ,  B23K9/0282 ,  B23K2201/06 ,  B23K2203/04

Abstract: Provided is a multiple-electrode submerged arc welding method, for steel, suitable for welding in the manufacture of large-diameter steel pipes, such as UOE steel pipes or spiral steel pipes, formed of base materials ranging in thickness from 10 to 50 mm. Specifically, steel is subjected to multiple-electrode submerged arc welding with three or more electrodes in which a direct-current power source is used to supply current to a first electrode, the welding by the first electrode is carried out at a current density of 250 A/mm 2 or more, preferably with a wire diameter of 3.2 mm or less and a weld current of 1,000 A or more, the welding by the second electrode is carried out at a current density of 150 A/mm 2 or more, preferably with a weld current of 600 A or more, one of the interelectrode spacings is 23 mm or more on a surface of the steel, and the remaining interelectrode spacings are 20 mm or less.

Abstract translation: 本发明提供一种多电极埋弧焊接方法，适用于制造厚度为10〜50mm的基材的UOE钢管或螺旋钢管等大口径钢管的焊接。 具体地说，将钢用三电极或多层电极进行多电极埋弧焊，其中使用直流电源向第一电极供电，第一电极的焊接以250的电流密度进行 A / mm 2以上，优选线径为3.2mm以下，焊接电流为1000A以上，第二电极的焊接以150A / mm 2以上的电流密度进行，优选 在焊接电流为600A以上的情况下，电极表面之间的电极间间隔为23mm以上，其余的电极间间隔为20mm以下。

公开(公告)号：EP3308895A4

公开(公告)日：2018-07-11

申请号：EP16807126

申请日：2016-06-08

Applicant: JFE STEEL CORP

Inventor： KOZUKI SHOHEI ,  HAYAKAWA NAOYA ,  OI KENJI

IPC: B23K9/18 ,  B23K9/095

CPC classification number: B23K9/18 ,  B23K9/095 ,  B23K9/184 ,  B23K9/188

Abstract: A multi-electrode submerged arc welding method using a plurality of electrodes is provided. For each of a second electrode to an nth electrode except a first electrode that is a front electrode in a welding direction where n is an integer of 2 or more: a welding power supply capable of controlling a waveform of a welding current is used; and when a maximum value of an electromagnetic force F i acting on an arc column at a wire tip of an ith electrode during welding is denoted by F imax in N/m, an average value of the electromagnetic force F i is denoted by F iave in N/m, and a standard deviation of the electromagnetic force F i is denoted by à Fi in N/m, welding is performed so that F imax, F iave , and à Fi satisfy relationships in Expressions (1) and (2).

公开(公告)号：EP2786830A4

公开(公告)日：2016-04-20

申请号：EP12853275

申请日：2012-11-28

Applicant: JFE STEEL CORP

Inventor： ISHIGAMI ATSUSHI ,  HAYAKAWA NAOYA ,  YANO KOJI

IPC: B23K9/18 ,  B23K33/00

CPC classification number: B23K9/188 ,  B23K33/006 ,  B23K2201/06 ,  B23K2203/04

Abstract: The present invention provides a submerged arc welding method capable of an attempt to enhance toughness of a welded zone with low heat input and an attempt to decrease a weld reinforcement height by suppressing excessive melting of a wire, and capable of achieving a deep depth of penetration and a wide bead width. In the submerged arc welding method, a first electrode at the head in a welding direction has a wire diameter of 2.0 to 3.2 mm and a current density of 145 A/mm 2 or more, second and subsequent electrodes are arranged behind the first electrode in a line, and a groove formed in a steel plate has a two-step groove shape satisfying ¸ B

公开(公告)号：EP2786829A4

公开(公告)日：2015-07-15

申请号：EP12853232

申请日：2012-11-28

Applicant: JFE STEEL CORP

Inventor： ISHIGAMI ATSUSHI ,  HAYAKAWA NAOYA ,  YANO KOJI

IPC: B23K9/18

CPC classification number: B23K9/188 ,  B23K9/23 ,  B23K33/006 ,  B23K2201/06 ,  B23K2203/04

公开(公告)号：EP2402106A4

公开(公告)日：2015-02-11

申请号：EP10746369

申请日：2010-02-25

Applicant: JFE STEEL CORP

Inventor： HAYAKAWA NAOYA ,  OI KENJI ,  ISHIGAMI ATSUSHI ,  SHIMADA KENJI ,  ODAKA MASAHIRO

IPC: B23K9/16 ,  B23K9/025 ,  B23K9/09 ,  B23K9/173 ,  B23K9/18 ,  B23K28/02 ,  B23K33/00 ,  B23K103/04

CPC classification number: B23K9/1735 ,  B23K9/025 ,  B23K9/09 ,  B23K9/188 ,  B23K28/02 ,  B23K33/004 ,  B23K2201/18 ,  B23K2203/04

公开(公告)号：EP3162489A4

公开(公告)日：2017-06-07

申请号：EP15814944

申请日：2015-06-25

Applicant: JFE STEEL CORP

Inventor： KOZUKI SHOHEI ,  HAYAKAWA NAOYA ,  OI KENJI

IPC: B23K28/02 ,  B23K9/18 ,  B23K26/21 ,  C22C38/00 ,  C22C38/14

CPC classification number: B23K9/18 ,  B23K26/21 ,  B23K28/02 ,  C22C38/00 ,  C22C38/14

Abstract: A method of butt welding steel plates includes: butting two steel plates (1) together, to form a Y groove having an opening portion (2) in an upper part and a root face portion (3) in a lower part; joining the two steel plates at the opening portion (2) of the Y groove by submerged arc welding, to form submerged arc weld metal (4) whose Ti content is 0.030 mass% to 0.100 mass%, B content is 0.0030 mass% to 0.0080 mass%, and [%Al]/[%O] is in a range of 0.5 to 1.2 where [%Al] is Al content in mass% and [%O] is O content in mass%; and joining the two steel plates at the root face portion (3) of the Y groove by laser welding, to form laser weld metal (5) so that the laser weld metal (5) enters into the submerged arc weld metal (4).

Abstract translation: 一种对接焊接钢板的方法，包括：将两块钢板（1）对接在一起，以形成在上部具有开口部分（2）并在下部具有根部面部分（3）的Y槽; 通过埋弧焊接在Y槽的开口部（2）接合两块钢板，从而形成Ti含量为0.030质量％〜0.100质量％的埋弧焊金属（4），B含量为0.0030质量％〜0.0080质量％ 质量％，[％Al] / [％O]为0.5〜1.2，其中[％Al]为Al含量以质量％计，[％O]以质量％计为O含量。 并且通过激光焊接在Y槽的根部面部分（3）处接合两个钢板以形成激光焊接金属（5），使得激光焊接金属（5）进入埋弧焊接金属（4）。

公开(公告)号：EP3162489A1

公开(公告)日：2017-05-03

申请号：EP15814944

申请日：2015-06-25

Applicant: JFE STEEL CORP

Inventor： KOZUKI SHOHEI ,  HAYAKAWA NAOYA ,  OI KENJI

IPC: B23K28/02 ,  B23K9/18 ,  B23K26/21 ,  C22C38/00 ,  C22C38/14

CPC classification number: B23K9/18 ,  B23K26/21 ,  B23K28/02 ,  C22C38/00 ,  C22C38/14

Abstract: A method of butt welding steel plates includes: butting two steel plates (1) together, to form a Y groove having an opening portion (2) in an upper part and a root face portion (3) in a lower part; joining the two steel plates at the opening portion (2) of the Y groove by submerged arc welding, to form submerged arc weld metal (4) whose Ti content is 0.030 mass% to 0.100 mass%, B content is 0.0030 mass% to 0.0080 mass%, and [%Al]/[%O] is in a range of 0.5 to 1.2 where [%Al] is Al content in mass% and [%O] is O content in mass%; and joining the two steel plates at the root face portion (3) of the Y groove by laser welding, to form laser weld metal (5) so that the laser weld metal (5) enters into the submerged arc weld metal (4).

Abstract translation: 对接钢板的方法包括：将两个钢板（1）对接在一起，形成在上部具有开口部分（2）的Y槽和下部的根部部分（3）; 通过埋弧焊在Y槽的开口部（2）接合两个钢板，形成Ti含量为0.030质量％〜0.100质量％的浸没电弧焊接金属（4），B含量为0.0030质量％〜0.0080 质量％，[％Al] / [％O]在0.5〜1.2的范围内，其中[％Al]为Al质量％，[％O]为O质量％ 并且通过激光焊接在Y槽的根部部分（3）处接合两个钢板，以形成激光焊接金属（5），使得激光焊接金属（5）进入埋弧焊接金属（4）。

公开(公告)号：EP2883643A4

公开(公告)日：2016-05-04

申请号：EP13828082

申请日：2013-05-24

Applicant: JFE STEEL CORP

Inventor： KOZUKI SHOHEI ,  ISHIGAMI ATSUSHI ,  HAYAKAWA NAOYA

IPC: B23K9/18 ,  B23K33/00

CPC classification number: B23K33/004 ,  B23K9/18

公开(公告)号：EP2436472A4

公开(公告)日：2015-05-27

申请号：EP09845247

申请日：2009-09-04

Applicant: JFE STEEL CORP

Inventor： ISHIGAMI ATSUSHI ,  OI KENJI ,  HAYAKAWA NAOYA

IPC: B23K9/18 ,  B23K9/025 ,  B23K101/06

CPC classification number: B23K9/18 ,  B23K9/0253 ,  B23K33/006 ,  B23K2201/06 ,  B23K2201/10 ,  B23K2203/04

Abstract: Provided is a submerged arc welding method for a steel plate which is preferably used in making and welding a large diameter pipe such as a UOE steel pipe or a spiral steel pipe. As specific means, in welding the steel plate from an internal surface or an external surface by a submerged arc welding, welding condition is set such that, a cross-sectional area of internal weld metal S 1 and a cross-sectional area of external weld metal S 2 satisfy the formula (1), the formula (2), and the formula (3), that is, 0.40‰¤(S1+S2)/t 2 ‰¤0.80 ...... (1), S 1 /t 2 ‰¤0.35 ...... (2), and S 2 /t 2 ‰¤0.45 ...... (3), wherein t: a plate thickness of the steel plate (mm), S 1 : a cross-sectional area of the internal weld metal (mm 2 ) excluding the cross-sectional area of a portion of the internal weld metal overlapping with the external weld metal after external welding, and S 2 : a cross-sectional area of the external weld metal (mm 2 ).