Abstract
The performance of a series of (V,Ti)C + (Ni,Mo) cermet systems with a given Mo content and varying V/Ti ratios in the carbide has been evaluated through hardnessvs crack resistance plots. It is shown that the partitioning of Mo between the binder and the carbide in these cermets is sensitive to the V/Ti ratio of the carbide. For both low and high V/Ti ratios, most of the Mo is in the carbide phase, but through different mechanisms. For intermediate V/Ti ratios, most of the Mo is in solid solution in the binder and provides strengthening. The best overall system performance is achieved when this ratio is close to unity, as borne out by the crack resistancevs hardness comparisons.
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Viswanadham, R.K., Sprissler, B., Precht, W. et al. The effect of V/Ti ratio on the partitioning of mo in (V, Ti) + (Ni,Mo) cemented carbides. Metall Trans A 10, 599–602 (1979). https://doi.org/10.1007/BF02658323
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DOI: https://doi.org/10.1007/BF02658323