W粉末的形貌结构对板状晶硬质合金的组织与性能的影响

Effects of Morphology Structures of Tungsten powders on the Properties and Microstructures of Plate-like Grain Cemented Carbi

摘要:

采用W Co C(碳黑)为原料制备板状晶硬质合金，研究了不同形貌结构的氧化钨所制备的W粉末形貌结构对板状晶硬质合金组织、性能的影响。结果表明，不同于蓝钨制备的高温中颗粒W粉呈类球状或斜方十二面体结构，黄钨制备的W粉末颗粒呈多面体等轴状，更易于通过球磨获取扁平化程度高的W粉末，制备出板晶化程度高，板状晶的长、径比大，晶粒的取向性好的板状晶硬质合金。

Abstract:

The plate-like grain cemented carbides were prepared using W Co C (carbon black) as the raw materials. Effects of the morphologies of tungsten powders prepared by different raw materials on the flattening morphologies of W powders and the microstructures and properties of plate-like grain cemented carbides were researched. It showed that the morphologies of W powders prepared by blue tungsten oxides (BTO) were spherical polyhedron. However, the W powders prepared by yellow tungsten oxides (YTO) were polyhedral equiaxial, which were easier access to prepare plate-like tungsten powders by ball milling, and prepare plate-like grain WC-Co cemented carbides.