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The wear performance of ultrafine-grained tungsten carbide–cobalt (WC–Co) hard metals during three-body abrasion and particle erosion has been evaluated and compared to that of similar conventional coarser grained hard metals. The tungsten carbide grain size varied between 0.5 and 3μm with cobalt contents ranging from 6 to 15%. Silica particles were used in both forms of testing. Erosion was carried...
One of the major areas of wear in the generation of power from coal occurs in the pneumatic transport of the pulverised fuel from the coal mills to the burners. This erosion of the pipes is vastly accelerated at the pipe bends, therefore the choice of lining material is extremely important.This paper addresses the problem through the systematic erosion testing, at different angles of impact, of fifteen...
A series of cemented tungsten carbides with different binder phases consisting of combinations of cobalt, nickel and chromium have been subjected to erosion-corrosion testing using a silica-water slurry. The polarization characteristics of these cermets have also been investigated using a potentiodynamic technique. It was found that the cermets exhibit decreasing slurry erosion rates with an increase...
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