Welding current magnetic field regulation at high-speed one-sided welding of the pipes for gas and oil pipelines

Authors

  • S. V. Shchetinin State higher educational establishment "Priazovskyi state technical university", Mariupol, Ukraine
  • P. V. Nikitenko State higher educational establishment "Priazovskyi state technical university", Mariupol, Ukraine
  • Elsaed Khaled State higher educational establishment "Priazovskyi state technical university", Mariupol, Ukraine

DOI:

https://doi.org/10.31498/2225-6733.39.2019.201052

Keywords:

magnetic blow, electromagnetic force, welding current magnetic field regulation, fine-grained microstructure, welded joints impact strength, one-sided high-speed pipe welding for gas and oil pipelines

Abstract

One-sided high-speed pipe welding for gas and oil pipelines is an energy and material saving process, the use of which is restricted by the magnetic blow and the violation of the external and internal welds formation. Therefore, the development of the one-sided high-speed pipe welding for gas and oil pipelines process, which ensures the magnetic blow prevention, stability, improving the welded joints quality and toughness, is an important scientific and technical problem. According to the magnetism quantum theory, any system with the help of radiation or another method always comes to the lowest or principal state, with an eigen value of energy equal to E0. It has been established that the magnetic blow is the result of the minimum energy law, according to which the arc deviates to the side of a lower magnetic field until the break, as a result of which the process stability and the welds formation quality are violated. When welding pipes for gas and oil pipelines, the magnetic blow increases significantly due to of the magnetic field lines concentration in the ferromagnetic pipe with high magnetic permeability, which results in increased magnetic blow and the violation of both the process stability and the welds formation. To prevent the magnetic blow, welding pipes with two-sided current supply and regulating the welding current magnetic field process by passing current in front and behind the arc has been developed, which ensures the arc equilibrium, reducing the magnetic field energy to zero, stability and improving of the welded joints quality. Оne-sided high-speed welding pipes for gas and oil pipelines method with two-sided current supply and the welding current magnetic field regulation by transmitting current behind and in front of the arc in a ratio I1/I2 = 1,7-1,9, that ensures the magnetic blow prevention, arc balance, process stability, fine-grained microstructure, the welded joints quality and impact strength improving has been developed

Author Biographies

S. V. Shchetinin, State higher educational establishment "Priazovskyi state technical university", Mariupol

Доктор технічних наук, професор

P. V. Nikitenko, State higher educational establishment "Priazovskyi state technical university", Mariupol

Аспірант

Elsaed Khaled, State higher educational establishment "Priazovskyi state technical university", Mariupol

Аспірант

References

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How to Cite

Shchetinin, S. V., Nikitenko, P. V., & Khaled, E. (2020). Welding current magnetic field regulation at high-speed one-sided welding of the pipes for gas and oil pipelines. Reporter of the Priazovskyi State Technical University. Section: Technical Sciences, (39), 61–66. https://doi.org/10.31498/2225-6733.39.2019.201052

Issue

No. 39 (2019): Reporter of the Priazovskyi State Technical University. Section: Technical sciences

Section

Welding technologies

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