Actual Problems in Machine Building 2017 Vol. 4 No. 3

Актуальные проблемы в машиностроении . Том 4. № 3. 2017 Материаловедение в машиностроении ____________________________________________________________________ 93 13. About the influence of a steady magnetic field on weld pool dynamics in partial penetration high power laser beam welding of thick aluminium parts / M. Bachmann, V. Avilov, A. Gumenyuk, M. Rethmeier // International Journal of Heat and Mass Transfer. – 2013. – Vol. 60. – P. 309–321. – doi: 10.1016/j.ijheatmasstransfer. 2013.01.015. 14. Watanabe Y., Takeda T., Sato H. Effect of magnetic field on weld zone by spotwelding in stainless steel // ISIJ International. – 2006. – Vol. 46. – P. 1292–1296. – doi: 10.2355/isijinternational.46.1292. 15. Yang D.C., Liu J.H. Effect of outer magnetic field on laser beam welding penetration depth // Laser Technology. – 2001. – Vol. 25, iss. 5. – P. 347–350. 16. Mechanism of the gas tungsten-arc welding in longitudinal magnetic field controlling. I. Property of the arc / J. Luo, C.S. Jia, Y.S. Wang, J. Xue, Y.X. Wu // Acta Metallurica Sinica. – 2001. – Vol. 37. – P. 212–216. THE INFLUENCE OF THE EXTERNAL ELECTROMAGNETIC FIELD ON THE STRUCTURE AND PROPERTIES OF WELD METAL Kornienko E. E., Ph.D. (Engineering), Associate Professor, e-mail: kornienko_ee@mail.ru Bezrukova V. A. , student, e-mail: vikabezrukova1995@mail.ru Tyutyunkova M. K. , Student, e-mail: mystery22@inbox.ru Gnidan K. A. , Graduate student, e-mail: g.k.@inbox.ru Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract In this study we overlaid submerged arc the wire KF S2 onto the plates from low carbon structural steel ST-355. In order to investigate the influence of the external electromagnetic field on the structure and properties of the compositions we carried out overlaying using both the external electromagnetic field and without it. The structure was investigated by the optical microscopy. Furthermore, the microhardness measurements as well as tribological tests are shown in this article. We demonstrated that volume fraction of acicular ferrite is increased and Widmanstatten ferrite is decreased in the weld metal obtained with external electromagnetic field. It contributes the increase of wear resistance and microhardness of the weld metal. Keywords weld deposit, external electromagnetic field, steel ST-355 Funding This study is financially supported by DAAD within the research project № 9.756.2016/ДААД.