Plasma-electrolyte chemical-thermal treatment of hard alloy
Year: 2025
Type: article
Abstract: The possibility of using of plasma-electrolytic treatment for the hard-alloy material surface complex modification, which consists of simultaneous diffusion saturation, heat treatment and plasma-electrochemical polishing of the surface, is shown. The phase composition, roughness and microhardness of the surface are studied, and tests for abrasive wear of nitrocarburized at different temperatures WC-Co8 hard-alloy plates are carried out. It is shown that plasma-electrolytic nitrocarburizing in an aqueous electrolyte based on carbamide and ammonium chloride leads to a change in the phase composition of the hard-alloy surface: strengthening oxide, nitride and carbide phases are formed. These changes lead increasing in the surface microhardness from 1800 to 2200 HV. As a result of anodic electrochemical dissolution, the roughness decreases by 2–4 times. The results of abrasive wear studies showed an increase in wear resistance by 25 % after nitrocarburization at a temperature of 850–950 °C. The results obtained confirm the potential of using plasma-electrolytic treatment processes for surface treatment of hard-alloy materials to improve operational characteristics. • Plasma-electrolytic treatment for WC-Co. • Saturation, heat treatment and polishing in one. • Microhardness and durability increasing, roughness reduction.
Source: Next Materials
Authors: B.L. Krit, M.A. Volosova, R.A. Vdovichenko, V.I. Morozov, Wu Ruizhi, T.L. Mukhacheva, I.V. Tambovskiy, I.V. Suminov, S.A. Kusmanov, S.N. Grigoriev
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,280
Funder: Russian Science Foundation
Award: G4392731134
OpenAlex ID: W7106701761