(廣州冷機公司電冰箱壓縮機研究所，廣州 510470)
摘 要: 對CuZnAl形狀記憶合金摩擦過程中的組織及成分變化進(jìn)行了研究。結(jié)果表明：CuZnAl形狀記憶合金在急冷急熱、強烈變形的摩擦過程中發(fā)生了由單一的M18R馬氏體β' 相向α＋β雙相平衡組織的轉(zhuǎn)變；當(dāng)摩擦條件較“緩和”時，沿摩擦表面形成α和β交替出現(xiàn)的組織；當(dāng)摩擦條件較“惡劣”時在摩擦層表層出現(xiàn)β相層，由表向內(nèi)依次為α相層、α＋β雙相層、交叉馬氏體層。此時β相容易從基體中剝落，合金的耐磨性低。
關(guān)鍵字: CuZnAl形狀記憶合金 摩擦磨損 擴散 相變
（Guangzhou Refrigeration Co., Ltd. Guangzhou 510470, P. R. China）
Abstract:The changes on microstructure and composition in Cu-Zn-Al shape memory alloy during friction have been investigated. It is shown that M18R martensite transforms into α+β when cooling, heating rapidly, and deforming strongly during friction test. In mild friction, α and β phases appear alternately along the surface. On the contrary, in severe friction, the phase layers present from the outmost surface inward are: β, α, α+β, cross-martensite subsequently. In this case, it is easy for β phase to breake away, thus results in poor wearing resistance.
Key words: CuZnAl shape memory alloy; friction and wear; diffusion; phase transformation
