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。
The plate-like grain cemented carbides were prepared using W+Co+C(carbon black) as raw materials. Effects of the morphologies of tungsten powders prepared from different raw materials on the microstructures and properties of plate-like grain cemented carbides were investigated. Results show that the morphologies of W powders prepared from blue tungsten oxides(BTO) are spherical polyhedron. However, the W powders prepared from yellow tungsten oxides(YTO) are polyhedral equiaxial, which are easier access to preparation of plate-like tungsten powders by ball milling and plate-like grain WC-Co cemented carbides with large L/D ratio and good grain orientation.