FIELD: technological processes.
SUBSTANCE: invention relates to a method of welding with tack welds of a welded steel pipe of large diameter of an open profile. Welding with tack welds is performed continuously on edges (1a) of open pipe (1) during the production of a welded large diameter steel pipe. Welding by tack welds is performed by arc welding with a metal consumable electrode in a shielding gas environment at a welding current of 1,000 A using welding wire (3) of solid cross-section with a diameter of 4.8 mm or more, which is fixed to contact tip (2). During welding, a distance of 25 mm or more is maintained between the outer surface of edges (1a) and the lower end of contact core (2).
EFFECT: method makes it possible to increase the welding speed, excluding uneven welded rolls, burnt and non-welded.
17 cl, 1 dwg, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF DEFECT-FREE HYBRID LASER-ARC WELDING OF THICK-WALL BUTT JOINTS | 2018 |
|
RU2697754C1 |
| METHOD OF WELDING OF BASE STRUCTURES MANUFACTURED OF STEEL | 1996 |
|
RU2089363C1 |
| ARC WELDING METHOD | 1993 |
|
RU2071400C1 |
| METHOD OF DEFECT-FREE HYBRID LASER-ARC WELDING OF THIN-WALL BUTT JOINTS | 2018 |
|
RU2697756C1 |
| METHOD OF PIG-IRON ELECTRIC ARC WELDING | 1994 |
|
RU2076027C1 |
| METHOD OF WELDING BUTTS OF LONGITUDINAL WELDED TUBES FROM HIGH-STRENGTH STEELS | 2009 |
|
RU2412032C1 |
| COMBINED WELDING PROCESS USING COMBINATION OF GAS-ARC WELDING BY METALLIC ELECTRODE AND HIDDEN-ARC WELDING, AND COMBINED-ACTION ARC WELDING MACHINE | 2010 |
|
RU2506148C2 |
| METHOD FOR ASSEMBLING WELDED LARGE-SIZE THICK-SHEET ORTHOTROPIC PLATES OF CARBON LOW-ALLOY STEELS FOR AUTOMATIC WELDING | 2003 |
|
RU2254974C2 |
| METHOD OF LASER-ARC WELDING OF VERTICAL JOINTS OF THICK-SHEET STEEL STRUCTURES | 2014 |
|
RU2578303C1 |
| METHOD FOR HYBRID LASER-ARC WELDING OF STEEL PIPES WITH OUTER LAYER OF PLATING | 2018 |
|
RU2684735C1 |
