Abstract
The influence of the mean grain size of tungsten carbide (in a range of 1–3μm) and the influence of the amount of cobalt binding agent (6–25% weight) in hard metals on the X-ray determination of the elastic macrostresses caused by deflection were studied. A confrontation of the results of X-ray measurements with the values of stresses calculated theoretically from the corresponding deflections and mean elastic constants showed that the values of the stresses determined by X-ray are systematically lower than those calculated theoretically and this difference is greater the larger the mean grain size of tungsten carbide and thus the larger the ratio of the binding cobalt.
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