2021 №02 (06) DOI of Article
2021 №02 (08)

The Paton Welding Journal 2021 #02
The Paton Welding Journal, 2021, #2, 37-40 pages

Surfacing parts in unloading device of centrifugal pumps

O.S. Kostornoi, M.O. Laktionov and K.Yu. Kholosha

Joint-Stock Company «Research and Design Institute for Atomic and Power Pump Building» 2, 2nd Zaliznychna Str., 40003, Sumy, Ukraine. E-mail:

Leveling of axial forces on the shaft of centrifugal pumps depends on characteristics of end slotted rings of the unloading device that determine the stability of a slotted gap between them. This paper presents the methods to improve wear resistance of surfaces mating between a slotted rings by their surfacing with coatings from a composite alloy reinforced by tungsten (relit) carbides. The advantages and disadvantages of electric arc, plasma-powder and furnace surfacing of slotted rings are shown, and a significant improvement in the process at a replacement of chipped tungsten carbide by spherical one is noted. 6 Ref., 4 Figures.
Keywords: slotted rings, tungsten carbides (relit), wear resistance, arc surfacing, plasma-powder and furnace surfacing

Received 10.12.2021


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5. Zhudra, A.P. (2014) Tungsten carbide based cladding materials. Ibid., 6-7, 69-74.
6. Som, A.I. (2004) Plasma-powder surfacing of composite alloys based on cast tungsten carbides. Ibid., 10, 43-47.