热处理工艺对AZ61镁合金干摩擦磨损性能的影响
发布时间:2018-03-26 18:17
本文选题:热处理 切入点:AZ镁合金 出处:《东北大学学报(自然科学版)》2017年11期
【摘要】:通过常温下的销盘式干滑动摩擦磨损试验,研究固溶及不同时间的时效处理对铸态AZ61镁合金摩擦磨损性能的影响.试验载荷为100 N,滑动速度为0.78 m/s,滑动距离为1 km.结果表明:固溶处理使铸态合金中的粗大β-Mg17Al12相溶解,导致合金的硬度降低,摩擦系数和磨损率升高;在170℃下对AZ61合金进行不同时间(0~80 h)的时效处理使尺寸细小的β相在晶内和晶界处析出,提高了合金的耐磨性,其中时效20 h后合金的摩擦系数和磨损率最低.AZ61合金在摩擦磨损的过程中共存在三种磨损机制:磨粒磨损、氧化磨损及剥层磨损.
[Abstract]:Through the dry sliding friction and wear test at room temperature, The effects of solid solution and aging treatment at different time on the friction and wear properties of as-cast AZ61 magnesium alloy were studied. The test load is 100N, the sliding speed is 0.78 m / s, and the sliding distance is 1 km 路s. The results show that the coarse 尾 -Mg17Al12 phase in the as-cast alloy can be dissolved by solid solution treatment. The hardness of the alloy decreased, the friction coefficient and wear rate increased, and the aging treatment of AZ61 alloy at 170 鈩,
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