Abstract
Purpose: This project aims to study the impact and effects of welding conditions and welding consumables on structural changes in the weld metal and the use of the experimental flux produced by restoring the iron oxide excess from smelter slags for automatic arc welding.
Design/methodology/approach: To study the impact of welding conditions and welding consumables on structural changes in the weld metal, four coupons were welded with the generic welding consumables and the experimental welding flux. Some coupons have been preheated to detect any reduction in the heat-affected zone and any subsequent distortions.
Findings: It has been found that heat treatment prevents areas with a coarse microstructure from forming and produces a more homogeneous fine crystalline structure of the weld and the heat-affected zone. Therefore, the preheated coupons and a coupon tempered by slower cooling of the metal under the slag deposit should have a finer crystalline structure than a coupon fabricated without preheating. It can be concluded from the observations that as the welding amperage increases, the total area of the heat-affected zone increases. It has been found that the experimental welding flux accumulates heat of the molten metal heating it up to metal austenitizing temperature and slowly cooling it down until the medium pearlite and ferrite mixture forms.
Originality/value: The collected experimental evidence confirms that the processed slag of smelters can be utilized as a welding flux and has a potential to address the challenge of smelter slag accumulation in the long term.
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Acknowledgments
The research project was performed at the Welding and Metallurgical Engineering Department of FGBOU VO Komsomolsk-on-Amur State University using the scientific equipment of the New Materials and Technology Resource Sharing Center and FEB RAS, Institute of Machine Science and Metallurgy.
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Bakhmatov, P.V., Startsev, E.A., Sobolev, B.M. (2021). Impact and Effect Study of Submerged-Arc Welding Conditions on Structural Changes in Weld Metal. In: Shakirova, O.G., Bashkov, O.V., Khusainov, A.A. (eds) Current Problems and Ways of Industry Development: Equipment and Technologies. Lecture Notes in Networks and Systems, vol 200. Springer, Cham. https://doi.org/10.1007/978-3-030-69421-0_8
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