Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel
In fields, such as oil and gas pipelines and nuclear power, narrow-gap welding has often been used for the connection of thick and medium-thick plates. During the welding process, a lack of fusion was prone to occur due to groove size limitations, seriously affecting the service safety of large stru...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/6/1057 |
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| author | Hongsheng Liu Ruilei Xue Jianping Zhou Yang Bao Yan Xu |
| author_facet | Hongsheng Liu Ruilei Xue Jianping Zhou Yang Bao Yan Xu |
| author_sort | Hongsheng Liu |
| collection | DOAJ |
| description | In fields, such as oil and gas pipelines and nuclear power, narrow-gap welding has often been used for the connection of thick and medium-thick plates. During the welding process, a lack of fusion was prone to occur due to groove size limitations, seriously affecting the service safety of large structures. The vertical oscillation arc pulsed gas metal arc welding (P-GMAW) method was adopted for narrow-gap welding in this study. The influence of the oscillation width on arc morphology, droplet transfer behavior and weld formation during narrow-gap welding was studied. Oscillation widths from 0 to 4 mm were used to weld narrow-gap grooves with a bottom width of 6 mm. The results show that, in non-oscillation arc welding, the arc always presented a bell cover shape, and the droplet transfer was in the form of one droplet per pulse, while the sidewall penetration of the weld was relatively small, making it prone to a lack of fusion. With an increase in the oscillation width, the arc gradually shifted to the sidewall. The droplet transfer mode was a mixed transfer of large and small droplets, and the sidewall penetration continued to increase, which was conducive to the fusion of the sidewall. However, when the oscillation width was wider than 3 mm, it led to the phenomenon of the arc climbing to the sidewall, and the weld was prone to porosity, undercutting and other welding defects. The oscillation width has a major impact on the stability of the welding process in vertical oscillation arc narrow-gap welding. |
| first_indexed | 2024-03-11T02:10:49Z |
| format | Article |
| id | doaj.art-d73f00a0d6bd44e983417b358604e590 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T02:10:49Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-d73f00a0d6bd44e983417b358604e5902023-11-18T11:36:13ZengMDPI AGMetals2075-47012023-05-01136105710.3390/met13061057Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 SteelHongsheng Liu0Ruilei Xue1Jianping Zhou2Yang Bao3Yan Xu4School of Mechanical Engineering, Xinjiang University, Urumqi 830049, ChinaSchool of Mechanical Engineering, Xinjiang University, Urumqi 830049, ChinaSchool of Mechanical Engineering, Xinjiang University, Urumqi 830049, ChinaSchool of Mechanical Engineering, Xinjiang University, Urumqi 830049, ChinaSchool of Mechanical Engineering, Xinjiang University, Urumqi 830049, ChinaIn fields, such as oil and gas pipelines and nuclear power, narrow-gap welding has often been used for the connection of thick and medium-thick plates. During the welding process, a lack of fusion was prone to occur due to groove size limitations, seriously affecting the service safety of large structures. The vertical oscillation arc pulsed gas metal arc welding (P-GMAW) method was adopted for narrow-gap welding in this study. The influence of the oscillation width on arc morphology, droplet transfer behavior and weld formation during narrow-gap welding was studied. Oscillation widths from 0 to 4 mm were used to weld narrow-gap grooves with a bottom width of 6 mm. The results show that, in non-oscillation arc welding, the arc always presented a bell cover shape, and the droplet transfer was in the form of one droplet per pulse, while the sidewall penetration of the weld was relatively small, making it prone to a lack of fusion. With an increase in the oscillation width, the arc gradually shifted to the sidewall. The droplet transfer mode was a mixed transfer of large and small droplets, and the sidewall penetration continued to increase, which was conducive to the fusion of the sidewall. However, when the oscillation width was wider than 3 mm, it led to the phenomenon of the arc climbing to the sidewall, and the weld was prone to porosity, undercutting and other welding defects. The oscillation width has a major impact on the stability of the welding process in vertical oscillation arc narrow-gap welding.https://www.mdpi.com/2075-4701/13/6/1057vertical oscillation arcnarrow gapP-GMAWoscillation widtharc behaviorsdroplet transfer |
| spellingShingle | Hongsheng Liu Ruilei Xue Jianping Zhou Yang Bao Yan Xu Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel Metals vertical oscillation arc narrow gap P-GMAW oscillation width arc behaviors droplet transfer |
| title | Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel |
| title_full | Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel |
| title_fullStr | Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel |
| title_full_unstemmed | Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel |
| title_short | Effects of Oscillation Width on Arc Characteristics and Droplet Transfer in Vertical Oscillation Arc Narrow-Gap P-GMAW of X80 Steel |
| title_sort | effects of oscillation width on arc characteristics and droplet transfer in vertical oscillation arc narrow gap p gmaw of x80 steel |
| topic | vertical oscillation arc narrow gap P-GMAW oscillation width arc behaviors droplet transfer |
| url | https://www.mdpi.com/2075-4701/13/6/1057 |
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