Automatic Welding, 2022, №04



2022 №04 (02)

DOI of Article 10.37434/as2022.04.03

2022 №04 (04)

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Avtomaticheskaya Svarka (Automatic Welding), #4, 2022, pp. 14-18

Centrifugal plasma surfacing of drill pump bushings

O.I. Som

Plasma-Master Co. Ltd. 3 Akademik Krzhizhanovskii str., 03142, Kyiv. E-mail:info@plasma-master.com

Features of centrifugal plasma surfacing using powders of three different alloying systems based on iron and nickel were studied. It is found that at centrifugal plasma surfacing the iron-based test powder has the best welding-technological properties. It allows producing deposited metal of 200Kh15D2MS2R type. The layer deposited with this powder, has a microstructure of uniform height and ensures increase of the sleeve wear resistance 5 – 6 times, compared to batch-produced ones, which are made from steel 70 and quenched by SHF. A design of the bushing component is proposed with replaceable surfaced sleeve, which is more adaptable to fabrication and allows repairing it by simple replacement of the worn sleeve. 10 Ref., 1 Table, 8 Fig.
Keywords: centrifugal plasma surfacing, surfacing alloys, deposited metal, metal structure, wear resistance, carbides, hardness, layer thickness


Received: 19.04.2022

References

1. Nikolich, A.S. (1973) Drill piston pumps. Moscow, Nedra [in Russian].
2. Mkrtychyan, Ya.S. (1984) Improvement of efficiency of drill pump units. Moscow, Nedra [in Russian].
3. Samoilovich, Yu.A. (2017) Increase of operating life of drill pump barrel by thermocyclic treatment of barrel material. Stal, 4, 44–49 [in Russian].
4. Site LLC Bursnab. http://www.bursnab.com, Moscow [in Russian].
5. Site LLC RosPrombur. http://www.rosprombur.ru, Moscow [in Russian].
6. Gladky, P.V., Som, A.I., Pereplyotchikov, E.F. (1984) Centrifugal surfacing. In: New processes of surfacing, properties of deposited metal and transition zone. Kyiv, PWI, 31-34 [in Russian].
7. Yushchenko, K.A., Gladky, P.V., Som, A.I. et al. (1991) Method of centrifugal surfacing. USSR author’s cert. 1636151. Publ. 23.03.1991 [in Russian].
8. (1979) Surfacing materials of countries-members of CMEA. Catalog. MTsNTI [in Russian].
9. Som, A.I., Zelnichenko, A.T. (2010) Numerical calculation of thermal processes in centrifugal plasma powder cladding. The Paton Welding J., 6, 13-18.
10. Yuzvenko, Yu.A., Gavrish, V.A., Marienko, V.O. (1979) Laboratory units for evaluation of wear resistance of deposited metal. In: Theoretical and technological principles of surfacing. Properties and tests of deposited metal. Kyiv, PWI, 23–27 [in Russian].

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