Abstract
The article presents the results of a research of the technological capabilities of double-electrode submerged arc welding of elongated fillet welds with a leg of 8 mm or more in one pass while ensuring high-quality and stable formation of weld. As the result of the research we reviewed the features of the fillet weld formation during welding of metal strips with a thickness of 14 mm with different locations of the welding wires in the torch relative to the axis of the welded joint. Consequently we determined the best option in terms of the quality of the weld formation and increase in welding productivity as compared with the two-pass single-arc welding. The conditions and parameters of the single-pass double-electrode (“split electrode welding”) submerged arc welding are established, providing a welding speed of up to 35 m / h.
Highlights
Elements of bridge and building structures are load-bearing welded structures with a large number of elongated fillet welds, usually performed using automatic welding methods
The remaining 70% are joints with fillet welds with a leg of 8 mm, which are mainly produced under double-pass automatic submerged arc welding with a 2.0 mm diameter welding wire and welding currents of approximately 350 A with a welding speed of about 18 m/h
It is obvious that the presented production technology requires an increase in welding productivity, i.e. research of the possibilities of using single-pass welding to produce 8 mm legs, while ensuring high-quality and stable formation of elongated fillet welds
Summary
Elements of bridge and building structures are load-bearing welded structures with a large number of elongated fillet welds, usually performed using automatic welding methods. As a general rule, allow to obtain elongated welds of guaranteed quality only with a leg up to 7 mm under single-pass automatic submerged arc welding [2]. The remaining 70% are joints with fillet welds with a leg of 8 mm, which are mainly produced under double-pass automatic submerged arc welding with a 2.0 mm diameter welding wire and welding currents of approximately 350 A with a welding speed of about 18 m/h. It is obvious that the presented production technology requires an increase in welding productivity, i.e. research of the possibilities of using single-pass welding to produce 8 mm legs, while ensuring high-quality and stable formation of elongated fillet welds.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
