(1. 华东船舶工业学院 材料及环境工程系, 镇江 212003 ;
2. 东南大学 机械工程系， 南京 210096)
摘 要: 采用超声伸缩振动空蚀设备及XRD和SEM等手段，研究了Cu-Al-Be阻尼合金与对比合金ZHMn55-3-1和ZQAl12-8-3-2的空泡剥蚀性能。结果表明，Cu-Al-Be合金的空泡剥蚀平均速率仅为0.04mm3/h，相当于ZHMn55-3-1的3.6%，ZQAl-12-8-3-2的50%，具有优异的抗空泡剥蚀性。外力作用下Cu-Al-Be合金马氏体变体间的界面迁移，有助于减轻材料表面的塑性变形和疲劳积累，提高抗空蚀性能。晶界网状α软相是该合金空泡剥蚀沿晶界发生的主要原因。
关键字: Cu-Al-Be阻尼合金；空泡剥蚀；马氏体变体
（1. Department of Material and Environment Engineering,
East China Ship Building Institute of Technology,
Zhenjiang 212003, China；
2. Department of Mechanical Engineering，
Southeast University, Nanjing 210096, China）
Abstract:An investigation of the cavitation erosion character of Cu-Al-Be damping alloys compared with other two kinds of alloys, i.e. ZHMn55-3-1 and ZQAl12-8-3-2, by means of an ultrasonic vibration apparatus and XRD and SEM were reported. The results prove that Cu-Al-Be alloys possess excellent cavitation erosion resistance with a small cavitation volume loss rate of 0.04mm3/h, which is just about 3.6% of ZHMn55-3-1s and 50% of ZQAl-12-8-3-2s. The motion of borders between martensite variants is of help to relieve the cavitation erosion. Being soft, α phase is the main factor for the cavitation erosion of the Cu-Al-Be alloys, which ocurs along polycrystalline borders.
Key words: Cu-Al-Be damping alloys； cavitation erosion； martensite variants
