热处理对Cu-Zn-Al合金形状记忆效应的影响

Influence of heat treatment on the shape memory effect of Cu-Zn-Al alloys

为提高Cu-Zn-Al形状记忆合金在应用过程中的稳定性及使用寿命,研究了在SME(ShapeMemory Effect)法训练条件下,热处理过程中不同的淬火介质对Cu-Zn-Al形状记忆合金形状记忆效应的影响.研究结果表明:使用不同的淬火介质,Cu-Zn-Al合金具有不同的形状记忆效应和不同的马氏体形貌,当淬火介质为冷水、冷油、沸水、沸油时,合金的形状记忆效应依次提高,马氏体形貌依次变得更为细小致密;随着训练次数的增加,位错增加,晶格原子有序度降低,形状记忆效应先急剧下降,后缓慢下降并趋于稳定.

In order to improve the stability ence of different quenching medium in heat and working life of Cu-Zn-Al shape memory alloys, the influtreatment on shape memory effect of Cu-Zn-Al shape memory alloys is investigated by using SME training method. The experimental results show that Cu-Zn-Al alloys have different shape memory effect and different martensitic structure when different quenching medium is used. The martensitic structure becomes smaller, denser and more orderly, and the shape memory effect of alloys rises when the quenching medium is in the order of cold water, cold oil, boiling water and boiling oil; With the increase of the training times, dislocation in the alloy increases, the atoms orderliness of crystal lattice decreases, and the shape memory effect of Cu-Zn-Al alloys decreases rapidly at first, then slowly and levels off.