钨精矿石含量对激光燃烧合成钨精矿石／Al-Cu复合材料组织结构及性能的影响

摘要

Tungsten/Al- Cu powder compacts with different tungsten powder contents were synthesized by laser combustion. The influences of tungsten powder content on the microstructure, densification and hardness of tungsten/Al- Cu composite were studied by SEM, OM, XRD and Vickers hardness tester. The results show that doped tungsten powders can refine alloys structure, increase the uniformity of alloys and promote densification. When the mass ratio of doped tungsten powder to Al - Cu powder is 3%, the synthesized density and hardness of sample reach the highest values, i.e. 3.43 g/cm3 and HV 244.4.%采用激光燃烧合成技术，对掺杂钨精矿石粉末的钨精矿石／Al-Cu粉末压坯进行燃烧合成。采用SEM、OM、XRD以及维氏硬度计研究了钨精矿石粉末的含量对合金微观结构、致密化行为及硬度的影响。结果表明：掺杂钨精矿石粉末可提高合金组织的细化、均匀化程度，促进其致密性。当钨精矿石粉末与Al-Cu粉末的质量比为3％时，试样的合成密度和硬度最高，分别为3．43g／cm3、HV244．4。