The Paton Welding Journal, 2023, №05



2023 №05 (01)

DOI of Article 10.37434/tpwj2023.05.02

2023 №05 (03)

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The Paton Welding Journal, 2023, #5, 11-14 pages

Influence of different types of modifiers on the structure and properties of deposited metal of the type of 25Kh5MFS tool steel

I.O. Ryabtsev¹, A.A. Babinets¹, M.O. Pashchin¹, O.M. Sizonenko², I.P. Lentyugov¹, I.I. Ryabtsev¹, T.G. Solomijchuk¹, A.S. Torpakov²

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²Institute of Pulse Processes and Technologies of the NAS of Ukraine. 43, a Bohoyavlenskyi Ave., 54018, Mykolayiv

Abstract
Comparative analysis of the influence of modifying additives of boron or titanium carbides on the structure and properties of the metal deposited with PP-Np-25KhFMS flux-cored electrode wire was performed in this study. It is shown that addition of some modifier in the amount of 0.01% does not have any significant influence on the deposited metal structure. Their influence on the structure differs to a certain extent. Boron modifying leads to an essential reduction of the crystallite dimensions, redistribution of nonmetallic inclusions and increase of metal microhardness. Unlike that, introducing titanium carbide microadditives into the weld pool influences the kinetics of metal solidification, which results in elimination of crystallite columnarity and metal structure transformation into the cell one. It is shown that owing to the mentioned changes in the structure, the wear and heat resistance of the metal, deposited with application of both the types of modifiers, is increased. Obtained results can be used at selection of promising methods to improve the service properties of the surfaced parts, which operate under the conditions of thermal force loading and wear at metal friction against metal. 11 Ref., 4 Fig.
Keywords: arc surfacing, modifying, microalloying, deposited metal, flux-cored wire, heat resistance, microstructure

Received: 28.04.2023
Accepted: 29.06.2023

References

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