Effect of arc distance on temperature field and weld shape during double-sided arc welding |
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| Authors: | ZHANG Guangjun ZHANG Huajun GAO Hongming WU Lin |
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| Affiliation: | 1. State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001
2. State Key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin, 150001;Material Science and Engineering, Harbin University of Science and Technology, Harbin, 150040 |
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| Abstract: | A new high efficiency welding method, double-sided double arc welding with double powers (DSAW-D), is developed for thick plate of low alloy high strength steel in this study. It is well known that the thermal cycles have an important influence on the microstructure, shape, stress, distortion and mechanical property. The DSA W-D method can control the tempernture field on a wide range by regulating the distance between two arcs, improve the rnicrostructure and prevent hot and cold cracking of high strength steel. But at present, the effect of arc distance on the temperature field and shape is not clear. Therefore, the paper researches the effect of arc distance on the temperature field and weld pool during DSA W-D using finite element method. The transient temperature field of different arc distance in DSAW-D is calculated.To verify the numerical results, the temperature is measured by the thermo-couple and the calculated results agree approximately with experimental data. Farther, the thermal property and mutual effect of double-sided arcs are investigated. The temperature distributions and weld pool profile at different arc distances are obtained. The results show that arc distance is a very important factor to affect the heat process. |
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| Keywords: | double-sided arc welding temperature field weld pool numerical simulation arc distance |
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