Cold metal transfer welding of 316L/430 dissimilar stainless-steel welds
Abstract
Purpose
This paper aims to examine dissimilar joints for various applications in chemical, petrochemical, oil, gas, shipbuilding, defense, rail and nuclear industry.
Design/methodology/approach
This study examined the effects of cold metal transfer welding on stainless steel welds for 316L austenitic and 430 ferritic dissimilar welds with ER316L, ER309L and without (autogenous) fillers. The microstructural observation was done with an optical microscope. The mechanical test was done to reveal the strength, hardness and toughness of the joint. The electrochemical polarization tests were done to reveal intergranular and pitting corrosion in the dissimilar joints.
Findings
This microstructural study shows the presence of austenitic and ferritic phases with vermicular ferrite for ER309L filler weld, and for ER316L filler weld specimen shows predominately martensitic phase in the weld region, whereas the autogenous weld shows lathy ferrite mixed with martensitic phase. Mechanical test results indicated that filler welded specimen (ER316L and ER309L) has relatively higher strength and hardness than the autogenous weld, whereas ER316L filler weld exhibited the highest impact toughness than ER309L filler weld and lowest in autogenous weld. The electrochemical corrosion results displayed the highest degree of sensitization (DOS) in without filler welded specimen (45.62%) and lower in case of filler welded specimen ER309L (4.95%) and least in case of ER316L filler welded specimen (3.51%). The high DOS in non-filler welded specimen is correlated with the chromium carbide formation. The non-filler welded specimen shows the highest pitting corrosion attack as compared to the ER316L filler weld specimen and relatively better in ER309L filler welded specimen. The highest pitting corrosion resistance is related with the high chromium content in ER309L composition.
Originality/value
This experimental study is original and conducted with 316L and 430 stainless steel with ER316L, ER309 and without fillers, which will help the oil, shipbuilding and chemical industries.
Keywords
Acknowledgements
The authors express their gratitude to Dr A.P. Patil, Professor of Metallurgical Engineering, VNIT Nagpur, for providing the necessary facilities. The authors would like to thank Mineral and Metal Testing Services, Nagpur, India, for providing chemical composition, tensile, and impact test results.
Since submission of this article, the following author has updated their affiliation: Ravinder Kataria is at the Department of Fashion Design, National Institute of Fashion Technology, Sri Nagar, Jammu, India.
Citation
Tembhurkar, C., Ambade, S., Kataria, R., Verma, J. and Moon, A. (2023), "Cold metal transfer welding of 316L/430 dissimilar stainless-steel welds", Anti-Corrosion Methods and Materials, Vol. ahead-of-print No. ahead-of-print. https://doi.org/10.1108/ACMM-03-2023-2774
Publisher
:Emerald Publishing Limited
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