论文部分内容阅读
为研究热处理对生物镁合金摩擦磨损性能的作用规律,对铸态Mg-6Gd-0.5Zn-0.4Zr(GZ60K)镁合金进行了固溶处理(T4)和固溶+时效处理(T6)。利用显微硬度计测试了合金的硬度,采用球盘式摩擦试验机测试了合金的摩擦磨损性能,利用SEM观察了合金的组织和磨损形貌,并结合EDS分析了微区化学成分。结果表明:与铸态相比,合金经过T4、T6热处理后显微硬度和摩擦系数变化均不明显,磨损率分别上升了28%和88%。不同状态下合金的主要磨损机制不同,该合金的耐磨性与硬度和摩擦系数无直接关系,主要受磨损形式的影响。
In order to study the effect of heat treatment on the friction and wear properties of bio-magnesium alloy, solution treatment (T4) and solution treatment + aging treatment (T6) were carried out on as-cast Mg-6Gd-0.5Zn-0.4Zr (GZ60K) magnesium alloy. The hardness of the alloy was tested by microhardness tester. The friction and wear properties of the alloy were tested by ball disc friction tester. The microstructure and wear morphology of the alloy were observed by SEM. The chemical composition of the micro-zone was analyzed by EDS. The results show that the microhardness and friction coefficient of the alloy after T4 and T6 heat treatment are not obvious, and the wear rate increases by 28% and 88% respectively. The main wear mechanism of the alloy under different conditions is different. The wear resistance of the alloy is not directly related to the hardness and friction coefficient, which is mainly affected by the wear form.