Cargando…

Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance

Real-time electric signal, matter transfer mode and welding pool behavior were obtained to investigate the effect of wires’ filling rate on arc stability and joints’ appearance during underwater wet flux-cored arc welding (FCAW). The electric signal results showed that arc stability first decreased...

Descripción completa

Detalles Bibliográficos
Autores principales: Zhang, Xin, Guo, Ning, Xu, Changsheng, Kan, Haoran, Tan, Yanbo, Chen, Hao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7084612/
https://www.ncbi.nlm.nih.gov/pubmed/32120811
http://dx.doi.org/10.3390/ma13051061
_version_ 1783508762160529408
author Zhang, Xin
Guo, Ning
Xu, Changsheng
Kan, Haoran
Tan, Yanbo
Chen, Hao
author_facet Zhang, Xin
Guo, Ning
Xu, Changsheng
Kan, Haoran
Tan, Yanbo
Chen, Hao
author_sort Zhang, Xin
collection PubMed
description Real-time electric signal, matter transfer mode and welding pool behavior were obtained to investigate the effect of wires’ filling rate on arc stability and joints’ appearance during underwater wet flux-cored arc welding (FCAW). The electric signal results showed that arc stability first decreased and then increased rapidly because the raise of filling rate affected the number of charged particles and the electrical conductivity of welding arc atmosphere. Two typical transfer modes, globular repelled transfer mode and surface tension transfer mode, were observed in this study. The ratio of surface tension transition could be increased by adding wires’ filling rate. Meanwhile, the geometry of molten pool was changed and the distance between droplets to welding pool reduced as the filling rate increased. The fusion line became more regular and the radius of curvature increased under the effect of bubbles in the molten pool. As the filling rate improving, more slags on the welds surface were acquired and the welds were much flatter and smoother.
format Online
Article
Text
id pubmed-7084612
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-70846122020-03-24 Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance Zhang, Xin Guo, Ning Xu, Changsheng Kan, Haoran Tan, Yanbo Chen, Hao Materials (Basel) Article Real-time electric signal, matter transfer mode and welding pool behavior were obtained to investigate the effect of wires’ filling rate on arc stability and joints’ appearance during underwater wet flux-cored arc welding (FCAW). The electric signal results showed that arc stability first decreased and then increased rapidly because the raise of filling rate affected the number of charged particles and the electrical conductivity of welding arc atmosphere. Two typical transfer modes, globular repelled transfer mode and surface tension transfer mode, were observed in this study. The ratio of surface tension transition could be increased by adding wires’ filling rate. Meanwhile, the geometry of molten pool was changed and the distance between droplets to welding pool reduced as the filling rate increased. The fusion line became more regular and the radius of curvature increased under the effect of bubbles in the molten pool. As the filling rate improving, more slags on the welds surface were acquired and the welds were much flatter and smoother. MDPI 2020-02-27 /pmc/articles/PMC7084612/ /pubmed/32120811 http://dx.doi.org/10.3390/ma13051061 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhang, Xin
Guo, Ning
Xu, Changsheng
Kan, Haoran
Tan, Yanbo
Chen, Hao
Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance
title Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance
title_full Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance
title_fullStr Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance
title_full_unstemmed Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance
title_short Effect of Filling Rate on Underwater Wet Welding Process and Weld Appearance
title_sort effect of filling rate on underwater wet welding process and weld appearance
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7084612/
https://www.ncbi.nlm.nih.gov/pubmed/32120811
http://dx.doi.org/10.3390/ma13051061
work_keys_str_mv AT zhangxin effectoffillingrateonunderwaterwetweldingprocessandweldappearance
AT guoning effectoffillingrateonunderwaterwetweldingprocessandweldappearance
AT xuchangsheng effectoffillingrateonunderwaterwetweldingprocessandweldappearance
AT kanhaoran effectoffillingrateonunderwaterwetweldingprocessandweldappearance
AT tanyanbo effectoffillingrateonunderwaterwetweldingprocessandweldappearance
AT chenhao effectoffillingrateonunderwaterwetweldingprocessandweldappearance