Abstract
The creation of efficient industries is possible by using sustainable technologies based on the processes of recycling of the production waste. First of all, it refers to expensive material waste, including hard alloys. The electro-erosive grinding is considered to be the effective method of recycling such materials. The results of research on recycling the tungsten-cobalt hard alloy show the possibility of obtaining tungsten-carbide powders possessing improved physical and mechanical properties. The technology mentioned is also perspective for recycling tungstenless hard-alloy waste both at the laboratory devices equipped with the RC-generator and at the industrial installations of bulky grinding. It is established experimentally that the electro-erosive grinding of the TN20 tungstenless hard alloy at the laboratory provides obtaining the main volume (up to 85%) of the powder particles of the spherical shape having a dimension of 5 µm and the specific surface of 31.5 m2/g. Higher physical and mechanical properties of powders are also provided during recycling the TN20 alloy waste at the industrial installations of bulky grinding.
Highlights
Nowadays materials based on carbides and nitrides of the transition materials are more and more widely used
The experiments on studying the electro-erosive grinding of alloys VC8 and TN20 were conducted
The particle distribution according to their size obtained by the static processing of the results is asymmetrical with the shift to the range 1.0 – 2.5 μm
Summary
Nowadays materials based on carbides and nitrides of the transition materials are more and more widely used. The same feature refers to carbides of such metals as tungsten and titan, which are widely used in the powder metallurgy for obtaining hard alloys. The inherent complex of tungsten carbide properties provides its wide use to obtain hard alloys, which nowadays are considered as the main tool material for metal processing and drilling operations.
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