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Vol.13, No.1, February 2024. ISSN: 2217-8309 eISSN: 2217-8333
TEM Journal
TECHNOLOGY, EDUCATION, MANAGEMENT, INFORMATICS Association for Information Communication Technology Education and Science |
Investigations of Wear Resistance of Hardfaced Layers on Steel 40X
Yaroslav Argirov, Tatyana Mechkarova, Georgi Luckanov, Desislava Mincheva
© 2024 Yaroslav Argirov, published by UIKTEN. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License. (CC BY-NC-ND 4.0)
Citation Information: TEM Journal. Volume 13, Issue 1, Pages 699-704, ISSN 2217-8309, DOI: 10.18421/TEM131-73, February 2024.
Received: 18 October 2023. Revised: 23 January 2024.
Abstract:
The article discusses a fundamental problem in the shipbuilding industry related to the repair of critical and expensive components directly related to the operation of ships in the global fleet. Methodology and technology for repair by welding of workpieces made of 40X steel have been developed and applied. Hardfacing electrodes of the brands OK 83.28 and OK 61.20 were used. The developed welding technologies include both buffered and non-buffered layers. For one of the specimens, preheating to a temperature of 200 degrees Celsius was performed, which proved to be optimal for the metal. The measured macro stresses are below the elastic limit of the examined metal. The measured residual stresses are insignificant at +62 MPa. The microhardness results show an increase in microhardness to about 450HV in the weld metal zone. The dry friction wear test performed on the welded layer showed a relatively uniform metal loss in both specimens due to the slight increase in temperature.
Keywords –Hardfacing, macro stresses, microstructure, microhardness Vickers, wear resistance. |
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