The Paton Welding Journal, 2024, №10



2024 №10 (01)

DOI of Article 10.37434/tpwj2024.10.02

2024 №10 (03)

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The Paton Welding Journal, 2024, #10, 11-18 pages

Features of the structure of coatings of tungsten and chromium carbides during detonation-gas spraying with energy accumulation in a multichamber device

Ke Liming, P.D. Stukhliak, V.M. Mudrichenko

Scientific-Research Institute of Welding Technologies named after E.O. Paton in Zhenjiang Province 233 Yonghui Road, Xiaoshan District, Hangzhou City, Zhejiang Province, China. E-mail: stukhlyakpetro@gmail.com

Abstract
This paper presents the results of studies of the structure of coatings obtained from powders based on chromium (75Cr3C2 + 25NiCr) (wt.%) and tungsten carbides (WC+12Co) (wt.%) by detonation-gas spraying with energy accumulation in multichamber devices. It has been established that this technology provides high-density coatings with a thickness of 200‒500 μm with porosity of less than 1 % and microhardness HV0.5 = 1235 ± 80 (WC + 12Co) (wt.%) and 1547 ± 150 (75Cr3C2 + 25NiCr) (wt.%). A characteristic feature of these coatings is the formation of a substructure with the size of 1‒8 μm and of carbide-type strengthening phases with dimensions of 100‒800 nm, which are evenly distributed in the volume of the coating material. It was established that a high level of structural strengthening of these coatings is provided by formation of a material with a dispersed subgranular structure with a uniform distribution of particles of strengthening phases in it.
Keywords: protective coatings, multichamber detonation-cumulative spraying, microstructure, microhardness, substructure, structural strengthening

Received: 21.06.2024
Received in revised form: 27.08.2024
Accepted: 22.10.2024

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Suggested Citation

Ke Liming, P.D. Stukhliak, V.M. Mudrichenko (2024) Features of the structure of coatings of tungsten and chromium carbides during detonation-gas spraying with energy accumulation in a multichamber device. The Paton Welding J., 10, 11-18.

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