(1. 華東船舶工業(yè)學(xué)院 材料及環(huán)境工程系, 鎮(zhèn)江 212003 ;
2. 東南大學(xué) 機(jī)械工程系， 南京 210096)
摘 要: 采用超聲伸縮振動(dòng)空蝕設(shè)備及XRD和SEM等手段，研究了Cu-Al-Be阻尼合金與對(duì)比合金ZHMn55-3-1和ZQAl12-8-3-2的空泡剝蝕性能。結(jié)果表明，Cu-Al-Be合金的空泡剝蝕平均速率僅為0.04mm3/h，相當(dāng)于ZHMn55-3-1的3.6%，ZQAl-12-8-3-2的50%，具有優(yōu)異的抗空泡剝蝕性。外力作用下Cu-Al-Be合金馬氏體變體間的界面遷移，有助于減輕材料表面的塑性變形和疲勞積累，提高抗空蝕性能。晶界網(wǎng)狀α軟相是該合金空泡剝蝕沿晶界發(fā)生的主要原因。
關(guān)鍵字: Cu-Al-Be阻尼合金；空泡剝蝕；馬氏體變體
（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
