Main Article Content
The paper presents the application of MAG welding to TMCP steels (thermo-mechanically controlled processed) grade S960MC and 3 mm thick. In the analyzed joints, the research focused on their mechanical properties and changes in the heat-affected zone (HAZ) that occur in this type of steels.
The hardness and tensile strength tests carried out showed a significant decrease in the properties of the joint compared to the declared values of the base material and the filler material used in the tests.
In the case of hardness, it was a decrease of 34% in HAZ and by 15-21% in relation to the strength limit. Changes in HAZ properties of a joint correlate with changes in its structure.
This work is licensed under a Creative Commons Attribution 4.0 International License.
Górka J., Stano S. Microstructure and properties of hybrid laser arc welded joints (laser beam-MAG) in thermo-mechanical control processed S700MC steel. Metals, 2018, 8, 132. doi:10.3390/met8020132
Skowrońska B., Chmielewski T., Golański D., Szulac J. Weldability of S700MC steel welded with the hybrid plasma + MAG method. Manufacturing Review, 2020 7, 4. doi.org/10.1051/mfreview/2020001
Schneider C. , Ernst W., Schnitzer R., Staufer H., Vallant R., Enzinger N. Welding of S960MC with undermatching filler material. Welding in the World, 2018, 62, 801–809. doi.org/10.1007/s40194-018-0570-1
A stronger, lighter, and more sustainable world. [Online] SAAB, 2019. [10.01.2019.] https://www.ssab.com/.
Pirinen T., The effects of welding heat input on the usability of high strength steels in welded structures, PhD. Thesis. Lappeenranta University of Technology, Lappeenranta, Finland, 2013.
Moravec J., Rohan P., Influence of different gas schielded types on weld pool’s geometry for MOG welding method , METAL 2011: 20th Anniversary International Conference on Metallurgy and Materials, 2011, 803-808.
Hochhauser F., Ernst W., Rauch R., Enzinger N., Influence of the soft zone on the strength of welded modern HSLA steels. Welding in the World, 2012, Vol. 56(5–6), 56-77.
Lundin, C.D., Gill, T.P.S., Qiao, C.Y., Heat affected zones in low carbon microalloyed steels. Recent trends in Welding Science and Technology Proceedings, 2nd International Conference, Gatlinburg, 1990.
Mičian M., Harmaniak D., Nový F., Winczek J., Moravec J., Trško L. Effect of the t8/5 cooling time on the properties of S960MC steel in the HAZ of welded joints evaluated by thermal physical simulation. Metals, 2020, 10, 229. doi:10.3390/met10020229
Górka J., Microstructure and properties of the high-temperature (HAZ) of thermo-mechanically treated S700MC high-yield-strength steel, Materials and technology. 2016, 50(4), 617–621. doi:10.17222/mit.2015.123
Górka J., Assessment of steel subjected to the thermomechanical control process with respect to weldability. Metals, 2018, 8, 169. doi:10.3390/met8030169
Jambor M., Ulewicz R., Nový F., Bokůvka O., Trško L., Mičian M., D. Harmaniak, Evolution of microstructure in the Heat Affected Zone of S960MC GMAW weld, Terotechnology 2017, Materials Research Proceedings, 5, 78-83 (2018).
Jambor, M., Novy, F., Mician, M., Trsko, L., Bokuvka, O., Pastorek, F., Harmaniak, D., 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, 2018, Vol. 20 (4), 29-35.
EN 10149-2 Hot rolled flat products made of high yield strength steels for cold forming - Part 2: Technical delivery conditions for thermomechanically rolled steels
EN ISO 16834-A Welding consumables - Wire electrodes, wires, rods and deposits for gas shielded arc welding of high strength steels – Classification
STN EN ISO 15614-1 Specification and qualification of welding procedures for metallic materials - Welding procedure test - Part 1: Arc and gas welding of steels and arc welding of nickel and nickel alloys.
TNI CEN ISO/TR 15608 Welding - Guidelines for a metallic materials grouping system.
Guo W., Crowther D., Francis J.A., Thompson A., Liu Z., Li L., Microstructure and mechanical properties of laser welded S960 high strength steel, Materials and Design, 2015, 85, 534–548.
Pała T., Dzioba I., Determination of strain and stress fields in welded joints of S960-QC steel. Archives of Metallurgy and Materials, 2017, 62 (4), 2081-2087.
Błacha S., Węglowski M.S., Dymek S., Kopyściański M., Microstructural and mechanical characterization of electron beam welded joints of high strength S960QL and Weldox 1300 steel grades. Archives of Metallurgy and Materials, 2017, Vol. 62 (2), 627-634.
Guo, W., Li, L., Dong, S., Crowther, D., Thompson, A., Comparison of microstructure and mechanical properties of ultra-narrow gap laser and gas-metal-arc welded S960 high strength steel. Optics and Lasers in Engineering, 2017, Vol. 91, 1-15.
Nowacki, J., Sajek, A., Matkowski, P., The influence of welding heat input on the microstructure of joints of S1100QL steel in one-pass welding. Archives of Civil and Mechanical Engineering, 2016, Vol. 16, 777-783.
Sharma V., Shahi A.S., Quenched and tempered steel welded with micro-alloyed based ferritic fillers. Journal of Materials Processing Technology, 2018, Vol. 253, 2-16.
Gaspar,M., Balogh A., GMAW experiments for advanced (Q+T) high strength steels, Production Processes and Systems, 2013, Vol. 6, 9-24.
EN ISO 6892-1 Metallic materials - Tensile testing - Part 1: Method of test at room temperature.
EN ISO 4136 Destructive tests on welds in metallic materials - Transverse tensile test.