Vorontsov A.V. et. al. 2019 Vol. 21 No. 2

OBRABOTKAMETALLOV Vol. 21 No. 2 2019 94 MATERIAL SCIENCE References 1. Steen W.M. Methods and apparatus for cutting, welding, drilling and surface treating . Patent Great Britain, no. 1547172, 1979. 2. Zhang L.-J., Bai Q.-L., Ning J., Wang A., Yang J.-N., Yin X.-Q., Zhang J.-X. A comparative study on the microstructure and properties of copper joint between MIG welding and laser-MIG hybrid welding. Materials and Design , 2016, vol. 110, pp. 35–50. DOI: 10.1016/j.matdes.2016.07.117. Structure and Mechanical Properties of Weld Metal Formed by Hybrid Laser-Arc Welding of 13Mn6 Steel Andrey Vorontsov 1, a, * , Kseniya Osipovich 1, b , Andrey Chumaevskii 1, c , Veronika Utyaganova 1, d , Anton Malyuk 2, e , Alexandr Stupakov 2, f , Evgeny Kolubaev 1, g , Valery Rubtsov 1, h a https://orcid.org/0000-0002-4334-7616, vav@ispms.com, b https://orcid.org/0000-0001-9534-775X , osipovich_k@ispms.tsc.ru , c https://orcid.org/0000-0002-1983-4385, tch7av@gmail.com, d https://orcid.org/0000-0002-2303-8015, filaret_2012@mail.ru , e https://orcid.org/0000-0002-7737-4233, antohindenis@mail.ru , f https://orcid.org/0000-0002-7899-053X , ans52@tpu.ru , g https://orcid.org/0000-0001-7288-3656, eak@ispms.ru , h https://orcid.org/0000-0003-0348-1869, rvy@ispms.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2019 vol. 21 no. 2 pp. 84–96 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2019-21.2-84-96 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 21 February 2019 Revised: 18 March 2019 Accepted: 11 April 2019 Available online: 15 June 2019 Keywords : Structural steel HLAW Weld seam structure Mechanical properties Weld metal Funding: This work was financially supported by Russian Federation Ministry of Education and Science (agreement No 14.607.21.0190, project identifier RFMEFI60717X0190) ABSTRACT Introduction. Hybrid laser-arc welding (HLAW) is an advanced technique of permanent joint formation. A distinctive feature of this process is the interaction of two heat sources in one melt welding bath. With the help of this type of welding it is possible to weld thick-walled metal workpieces in one pass without cutting edges at high speed. Due to the fact that this welding process involves two heat sources that influence each other in the welding process and form molten pools with different characteristics and different structure after solidification, the study of the relationship between the formation of the weld structure and its mechanical properties is still relevant. Research of welds on the example of structural steel 13Mn6 is an important study in welding engineering. The aim of the work is to investigate the structure and mechanical properties of weld metal formed by hybrid laser-arc welding. Results and discussion . On the basis of the obtained data it is possible to draw a conclusion that the weld metal formed by hybrid laser-arc welding is heterogeneous. The heterogeneity is shown in different directions both in the microstructure and in the results of the microhardness study. Measurements of microhardness inside the weld clearly demonstrate the thermal history of the hybrid laser-arc welding process. The boundary area of the two molten pools has a reduced hardness in comparison to the arc or laser melting zones only. Static tensile tests on the weld metal have shown differences between the arc and laser melt pools. Mechanical test results also demonstrated seam metal anisotropy in mutually perpendicular directions. For citation: VorontsovA.V., Osipovich K.S., Chumaevskii A.V., Utyaganova V.R., MalyukA.P., StupakovA.N., Kolubaev E.A., Rubtsov V.E. Structure and mechanical properties of weld metal formed by hybrid laser-arc welding of 13Mn6 steel. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2019, vol. 21, no. 2, pp. 84–96. DOI: 10.17212/1994-6309-2019-21.2- 84-96. (In Russian). ______ * Corresponding author Vorontsov Andrey V. , Postgraduate, Junior researcher Institute of Strength Physics and Materials Science Siberian Branch of Russian Academy of Science, 2/4 pr. Akademicheskii, Tomsk, 634055, Russian Federation Tel.: +7 (983) 239-3417 , e-mail: vav@ispms.ru