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Application of pulse technologies in the welding of structural steels
The results of studies of technological capabilities of the process of pulse-arc welding of structural steels, including the use of flux-cored wires, are given in the paper. The raised level of metal losses on waste and sputter leads not only to the welding wire over-expenditure, but also to the wel...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | Russian |
| Published: |
Journal of Mechanical Engineering
2014
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| Subjects: | |
| Online Access: | https://journals.uran.ua/jme/article/view/19918 |
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| Summary: | The results of studies of technological capabilities of the process of pulse-arc welding of structural steels, including the use of flux-cored wires, are given in the paper. The raised level of metal losses on waste and sputter leads not only to the welding wire over-expenditure, but also to the welding torch nozzle choking, gas protection deterioration, sputters pickup on the work piece. Application of pulse arc welding technologies allows the effective solution of a number of techno-logical problems.The studies on welding of pipe steel X60 were conducted. The proposed combined approach can have prospects in the welding of pipelines of large diameter and thickness, where the root weld is made without a magnetic blow by contact welding, and all subsequent layers are made by the pulse arc welding. For welding of the "hot" pass, following the root, the mixture of shielding gases of argon and carbon dioxide with the addition of helium can be used. The experimental studies at the pulse arc welding and surfacing of various flux-cored wires, including self-shielding wires, were conducted. The use of power supplies with the adjustable pulse shape of welding current allows to improve the efficiency of welding and surfacing with flux-cored wires. |
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