Abstract
The behaviour of cemented carbides subjected to pressures of 4–12 kN/mm2 in a belt-type apparatus has been investigated. The materials studied were industrial sintered WC-Co (3–30 wt.-% Co), also TiC-Co and TiC-Ni produced in the authors’ laboratory by powder-metallurgy techniques. When necessary, the average particle size of the carbide crystals was modified by suitable annealing. The permanent deformation characteristics as a function of composition and applied pressure were recorded, and each specimen was examined by quantitative metallography, before and after compression, to determine the relation between microstructural changes (fractures and slips in carbide crystals) and microstructural parameters (grain size, contiguity, & c.) for different pressures. Fracture-path analysis was also performed on fractured compression vessels by transmission and scanning electron microscopy.
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