Effect of Mo2C Addition Amount on Microstructure and Properties of YG6 Fine-Grained Cemented Carbides
YG6 fine-grained cemented carbides with different amounts of Mo2C were prepared by traditional powder metallurgy method.The influence of Mo2C addition amount on the microstructure and properties of YG6 fine-grained cemented carbides was studied by observing the microstructure and testing the physical and mechanical properties.The results show that with the increase of Mo2C addition,the grain size of WC in the alloy becomes finer and stablizes.When the addition of Mo2C in the alloy exceeds 3.5％,it has sphe-roidizing effect on the morphology of WC grains.In addition,the addition of Mo2C reduces the density of the cemented carbides,while the coercive force increases with the increase of Mo2C content.When Mo2C addition amount is 5.0％,the cemented carbides exhibit the best comprehensive mechanical properties,with hardness of 92.7 HRA,bending strength of 3 600 MPa,and abrasive wear value of 0.81 cm3/(105r).
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