测定了Ｃｕ１２ ．２Ａｌ４ ．０ Ｍｎ 形状记忆合金的塑性图， 研究了微量元素Ｎｉ， Ｃｏ 和Ｂ 对合金的显微组织和加工性能的影响。结果表明：１） 试验合金在７００ ℃～８００ ℃高温β相状态下具有非常 好的塑性加工性能， 而在室温则呈脆性断裂；２） 试验合金中加入少量的（Ｎｉ＋ Ｂ＋ Ｃｏ） ， 可以细化合金的晶粒，提高合金的冷加工性能；３） 采用有利发挥合金塑性的加工方法， 则能提高该合金的冷加工性能 Determination of Cu  12. 2Al  4. 0 Mn shape memory alloy, the effects of trace elements Ni, Co and B on the microstructure and workability of the alloy were studied. The results show that: 1) The test alloy has very good plasticity in β-phase at 700 ℃ ~ 800 ℃ and brittle fracture at room temperature; 2) A small amount of (Ni + B + Co) The alloy of the grain, improve the cold workability of the alloy; 3) the use of favorable plasticity of the alloy processing method, can improve the cold workability of the alloy