Author： Bovkun Galina A. Laptev Anatolii V.
Publisher： Springer Publishing Company
ISSN： 1068-1302
Source： Powder Metallurgy and Metal Ceramics, Vol.43, Iss.5-6, 2004-05, pp. : 265-272
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Abstract
We have studied the erosion characteristics of hard alloys under electrospark alloying conditions, and the relationship of such characteristics with the physical and mechanical properties. WC – 16% Co alloys were obtained by conventional sintering under vacuum in the temperature range 950-1350°C, and by sintering followed by high-energy pressure treatment at the same temperatures. We have shown that the erosion resistance depends ambiguously on the porosity and bending strength but is quite clearly connected with the crack resistance and the electrical resistivity which in turn is determined by the quality of the interphase and intergrain boundaries. We have refined the structural dependence of the erosion resistance of hard-alloy electrodes. This dependence is manifested to the same extent as the structural dependence of the electrical resistance.
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