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A contribution to the study of negative polarity in GMA welding
ESAB AB, Gothenburg, Sweden.
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för svetsteknologi (SV). (PTW)ORCID-id: 0000-0002-0234-3168
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för svetsteknologi (SV). (PTW)
Högskolan Väst, Institutionen för ingenjörsvetenskap, Avdelningen för svetsteknologi (SV). (PTW)ORCID-id: 0000-0003-2560-0531
Vise andre og tillknytning
2018 (engelsk)Inngår i: The International Journal of Advanced Manufacturing Technology, ISSN 0268-3768, E-ISSN 1433-3015, Vol. 95, nr 5-8, s. 2543-2553Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

GMAW using the electrode with negative polarity (DCEN) has been frequently suggested as a potential means of increasing production capacity. The objective of this work was to further study the performance of negative polarity in GMAW of carbon steels. In this project phase, bead-on-plate welds were carried out in flat position to assess the effect of different potential shielding gas compositions on bead geometry, finishing and spattering. The characteristics were compared with DCEP at the same current, but depositing the same volume of material per unit of length (more industrial related comparison). The arc length was kept the same by adjusting voltage to reach shortest arcs, yet with suitable non short-circuiting metal transfer mode. An approach to measure bead convexity was also proposed and assessed. The results showed that DCEN is feasible as a means of increasing GMAW production capacity. However, to become DCEN applicable with GMAW, the results suggest an Ar based blend with around 6.5 % of O2 is the most appropriate shielding gas, as much as that there is a demand for a standard electronic controlled power source able to work in constant current mode. 

sted, utgiver, år, opplag, sider
2018. Vol. 95, nr 5-8, s. 2543-2553
Emneord [en]
Welding; Production; GMAW; Negative Polarity; Fusion rate; Weld bead geometry
HSV kategori
Forskningsprogram
TEKNIK, Produktions- och materialteknik; Produktionsteknik
Identifikatorer
URN: urn:nbn:se:hv:diva-11817DOI: 10.1007/s00170-017-1349-zScopus ID: 2-s2.0-85035104454OAI: oai:DiVA.org:hv-11817DiVA, id: diva2:1160297
Prosjekter
Maplab
Forskningsfinansiär
Region Västra Götaland, RUN 612-0254-15
Merknad

Funders: Swedish Agency for Economic and Regional Growth, 20200328.

Tilgjengelig fra: 2017-11-26 Laget: 2017-11-26 Sist oppdatert: 2020-04-02bibliografisk kontrollert

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Li, PeigangHurtig, KjellHögström, MatsSvensson, Lars-ErikScotti, Americo

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