A comparison between ultrafine WC-Co and fine WC-VC-Co alloys

Randt, D. du; Luyckx, S.; Marcoulides, D.; Northrop, I.T.; Whitefield, David

doi:10.1504/ijmpt.2000.001254

Cited by 7 publications

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“…Прочность по Пальквисту тонкодисперсных WC-VC-Co сплавов или равна, или выше, чем у WC-Co-сплавов той же объемной доли Со, но выше, чем у сверхтонких WC-Co равной твердости (du Randt, D., Luyckz, S., Marcoulides, D., Northrop, I.T. and Whitefield, D.J., 2000) [2].…”

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Alloying Hard Metals of Tungsten Carbide-Cobalt System with Vanadium and Rhenium to Improve Wear Resistance

У.Ш.

Ernazarov

Guro

2020

Challenges of Science

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Vanadium and rhenium modified samples of hard alloy systems WC-VC-Co, WC-ReC-Co (grade VK-6) are considered when testing their wear resistance and hardness, in comparison with the serial alloy VK-6. The samples of the groups differed in the content of vanadium and rhenium, and additional purification of the raw material. The reason for the reduced wear resistance of the VK-6 alloy, caused by the structural features and the presence of impurities, is revealed. Sample test results: WC-VC-Co alloys in the VC concentration range of 1.0-16.0% by weight, turned out to be ≈ 3% harder and 30-90% more resistant to wear; WC-ReC-Co alloys, at a ReC concentration of 1-5% by weight, turned out to be ≈3% harder and 38.5% more resistant to wear; additional purification of the W-raw material of the WC-ReC-Co alloy with a ReC concentration of 5% by weight, in comparison with the alloys: VK-6 and VK-6 modified with 5% rhenium without additional purification, increased wear resistance from 38.5% (alloy "VK-6 modified with 5% rhenium"), up to 57.0% (single) and 65.3% (three times purification) alloy "VK-6 modified with 5% rhenium with additional purification". Experimental-industrial tests of products - surfacing on turning tools made of VK-6 alloy with VC 3% wt., Revealed that they were 30-35% more resistant to wear than samples from the serial VK-6 alloy, with an equal content cobalt; this means an increase in the resource of the tool by 30-35%. It was recommended to introduce alloying and additional purification of tungsten raw materials.

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