Resumo

MALEKA, A.M.; MATJEKE, V.J.  e  VAN DER MERWE, JW.. Optimizing of gas-shielded metal arc welding parameters for 10.5-12.5% chromium steel using 3o8L electrodes. J. S. Afr. Inst. Min. Metall. [online]. 2023, vol.123, n.4, pp.157-163. ISSN 2411-9717.  http://dx.doi.org/10.17159/2411-9717/2037/2023.

The 10.5-12.5% chromium, titanium-stabilized ferritic stainless steel (FSS) plates used to fabricate coal line jumbo wagons is susceptible to undesirable chromium depletion during welding with 309L electrodes. In this work, non-stabilized FSS plates were welded using 308L welding electrodes. The objective was to weld non-stabilized FSSs using gas-shielded metal arc welding without causing sensitization. The welding process was optimized by lowering the heat input. Sensitization was assessed by rigorous etching techniques and anodic polarization scans. In addition, the welds were subjected to tensile testing, and their fracture surfaces were examined for intergranular cracking. Non-stabilized FSS plates were successfully welded using gas metal arc welding.

Palavras-chave : Titanium-stabilized ferritic stainless steel; welding parameters; 308L welding electrode; gas metal arc welding; heat input.

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