Optimizing the content of nickel in flux-cored wire intended for welding micro-alloyed steels
Abstract
This paper presents the results related to organizing production of flux-cored wire alloyed with Ni and Mo according to standard AWS A5.29 intended for the MAG welding process. On the experimental line for steel strip calibration and production of flux-cored wire, two batches of flux-cored wire were produced with a constant Mo and Ni content at two levels (1.2% Ni in one and 2.6% Ni in the other batch). Experimental welding of steel plate samples was performed using the MAG process with two qualities of cored wire. Testing the structure and quality of the weld metal was done in order to optimize the content of Ni in the alloyed flux-cored wire intended for welding fine-grained micro-alloyed steels. Based on the analysis of test results of the microstructure and EDS analysis of the structure of welded samples and test results of tensile properties and impact energy, conclusions were made about the optimal content of Ni in the weld metal and thus the choice of quality of flux-cored wire.
Keywords
flux-cored wire, weld metal, microstructure, tensile properties, impact energy, MAG process
Acknowledgements
The paper was originally published in the Proceedings of the Conference Welding 2014, held at Bor Lake, Serbia, from June 4 to 7, 2014, where it was also presented.
References
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