Technology of mesostructure formation in sintered WC–Co and WC–Ni hard alloys

Keywords

sintered WC–Co, WC–Ni hard alloys, tungsten carbide, granule, mesostruc¬ture, friction pairs.

Cite as

Matviichuk О. О., Andreiev І. V., Hnatenko І. О., Ievdokymova O. V., Davydenko S. А., and Tsysar M. О. Technology of mesostructure formation in sintered WC–Co and WC–Ni hard alloys. Physico­chemical Mechanics of Materials. 2022. 58(2), 029-032.

Abstract

Іt is demonstrated for the first time that the mesostructural WC–Co or WC–Ni hard alloy can be obtained by ordinary liquid-phase sintering at temperatures from 1290°C to 1370°C and isothermal holding time of 10–20 min. The hardness of the alloys with a mesostructure with a decreasing cobalt content from 28 to 20 mass%, increases from 77.5 to 81 HRA, while the microhardness of mesoelements can change from 4.76 to 6.3 GPa. The meso­struc­tural WC–Co alloys are effective in upsetting and stamping tool and mining tool where high wear and impact resistance and load variability are required, and WC–Ni are effective when used in heavy friction pairs.

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