Fabrication of Nanostructured Gradient Tungsten-Cobalt Alloy Using Carbon Deficiency Powder

Maksim Dvornik; Elena A. Mikhailenko

doi:10.4028/www.scientific.net/DDF.386.370

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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 386Fabrication of Nanostructured Gradient...

Fabrication of Nanostructured Gradient Tungsten-Cobalt Alloy Using Carbon Deficiency Powder

Abstract:

A nanostructured functionally graded hard alloy was obtained by sintering at temperatures from 1350 to 1410 ° C of two-layer "green bodies", each consisting of layer of powder with normal carbon content (WC-15Co-0.4VC-0.4Cr2C3) and powder layer with deficit of carbon (WC-8Co-0.4VC-0.4Cr2C3). The formation of the η phase (Co₃W₃C) in the layer with cobalt deficiency causes the migration of cobalt to it and prevents the return of cobalt back in a wide temperature range of temperatures (1350-1410). The porosity of the resulting nanocrystalline hard alloy at 1410 ° C is reduced to 2%, and the maximum hardness of the surface layer with a low cobalt content (10%) reaches 1945HV.

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Periodical:

Defect and Diffusion Forum (Volume 386)

Pages:

370-376

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.386.370

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Online since:

September 2018

Authors:

Maksim Dvornik, Elena A. Mikhailenko*

Keywords:

Carbon Deficiency, Nanostructured Gradient WC-Co Hard Alloy

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