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）。