Communications - Scientific Letters of the University of Zilina 2018, 20(4):29-35 | DOI: 10.26552/com.C.2018.4.29-35

Gas Metal Arc Welding of Thermo-Mechanically Controlled Processed S960MC Steel Thin Sheets with Different Welding Parameters

Michal Jambor1, Frantisek Novy1, Milos Mician2, Libor Trsko3, Otakar Bokuvka1, Filip Pastorek3, Daniel Harmaniak2
1 Department of Materials Engineering, Faculty of Mechanical Engineering, University of Zilina, Slovak Republic
2 Department of Technological Engineering, Faculty of Mechanical Engineering, University of Zilina, Slovak Republic
3 Research Centre, University of Zilina, Slovak Republic

In this paper are presented results of mechanical properties evaluation of the thin sheets welds made of the S960MC TMCP steel, which were executed using the GMAW procedure with different process parameters. The microstructural changes in the heat affected zone (HAZ) were evaluated, as well. The microstructural observation revealed significant changes in the HAZ and the three main zones, coarse grain, fine grain and intercritical (CGHAZ, FGHAZ and ICHAZ) were identified in the HAZ for both sets of tested welding parameters. Evaluation of the micro-hardness showed significant reduction of the micro-hardness in the ICHAZ, for both tested states, and the ICHAZ was identified as the most critical area of the whole welded joint. Results of the tensile tests revealed significant reduction of mechanical properties regardless of the welding parameters.

Keywords: gas metal arc welding; S960MC steel; heat affected zone; mechanical properties; microstructural changes

Received: September 25, 2018; Accepted: October 15, 2018; Published: December 31, 2018  Show citation

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Jambor, M., Novy, F., Mician, M., Trsko, L., Bokuvka, O., Pastorek, F., & Harmaniak, D. (2018). Gas Metal Arc Welding of Thermo-Mechanically Controlled Processed S960MC Steel Thin Sheets with Different Welding Parameters. Communications - Scientific Letters of the University of Zilina, 20(4), 29-35. doi: 10.26552/com.C.2018.4.29-35
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