Authors: M.V. Radchenko, V.S. Kiselev

Title of the article: Practical aspects of supersonic gas-powder surfacing technology for wear-resistant coatings

Year: 2022, Issue: 6, Pages: 7-13

Branch of knowledge: 05.02.07 Technology and equipment for mechanical and physico-technical processing

Index UDK: 621.791

DOI: 10.26730/1999-4125-2022-6-7-13

Abstract: It is extremely necessary to exclude completely the dependence on imported technologies due to sanctions conditions in mechanical engineering. It is critically important to increase the service life of manufactured domestic equipment in various fields. The paper presents the results of the practical application of a new process of supersonic gas-powder surfacing (SGP-surfacing) of self-fluxing powder alloys based on nickel-chromium-boron-silicon on the butt and radial surfaces of the cavitation chopper pump impellers blades. The cavitation chopper pump is a rotary type pump operating in the mode of liquid cavitation disturbance, which is a condition for efficient grinding and heating of a mixture of liquid and solid components. The formation of a deposited protective coating with a nickel-chromium-boron-silicon structure and uniformly distributed carbides is characteristic for the SGP-surfacing of alloys at fraction of 40...100 microns. Such structure makes it possible to increase the wear resistance of equipment surfaces by 8...12 times. It should be noted that powder high-alloy alloys with a fraction of more than 40 microns are produced by domestic manufacturers, which determines complete independence from imported materials. As a result of complex investigations rational modes of supersonic gas-powder surfacing are determined.

Key words: Cavitation chopper pump supersonic gas-powder surfacing self-fluxing powder alloys

Receiving date: 15.10.2022

Approval date: 01.12.2022

Publication date: 27.12.2022

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