固溶温度对CuZnAl合金形状记忆性能的影响  

Effect of Solution Temperature on Shape Memory Effect of CuZnAl Alloy

作　　者：黄姝珂[1] 李宁[1] 莫华强[1] 胥永刚[1] 

机构地区：[1]四川大学制造科学与工程学院,四川成都610065

出　　处：《金属热处理》2005年第2期47-50,共4页Heat Treatment of Metals

基　　金：高等学校博士学科点专项科研基金 (2 0 0 3 0 610 0 93 )

摘　　要：研究了Cu 2 6 87Zn 3 85Al(wt% )形状记忆合金固溶温度对其形状回复率的影响。结果表明 ,该合金采用固溶 +上淬工艺处理后 ,在 6 0 0℃～ 72 0℃范围内 ,形状回复率随着固溶温度的升高迅速增加 ,在 72 0℃后趋于稳定 ,达到最大值 ;固溶温度越高 ,合金晶粒越大 ,会对其力学性能造成负面影响 ,在能保证合金形状记忆性能的基础上应尽量保证合金的晶粒小 ,因此其最佳固溶温度是 72 0℃。将该合金在室温下自然时效一个月后 ,由于马氏体稳定化 ,其形状回复率有小幅度下降。The effect of solution temperature on shape memory effect (SME) of Cu-26.87Zn-3.85Al(wt%) shape memory alloy (SMA) was studied. The results show that from 600°C to 720°C, the SME of this solutionized and above-quenched alloy increases quickly with the increase of solution temperature. Above 720°C, the SME of this alloy is going to the max and be come stable. The higher the solution temperature is, the bigger the grain size is. The big grain size have negative effect on alloy's mechanical properties, so the grain size should be small if the SME of this alloy is good. According to this, the best solution temperature of the alloy is 720°C. After natural ageing for one month at room temperature, the SME of the alloy decreased a little because of the martensite stabilization.

关 键 词：形状记忆合金 形状记忆性能 固溶温度 马氏体稳定化 

分 类 号：TG156.94[金属学及工艺—热处理]