【摘要】 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更多还原

【Abstract】 A plastic graph was surveyed and the effect of trace elements such as Ni, B and Co on microstructures and working properties of Cu 12.2Al 4.0Mn shape memory alloy was studied. The test results are as follows: 1)The alloy posesses excellent plastic working properties in β phase state at 700～800 ℃, but it occurs brittle breakdown at room temperature; 2) Grain was refined and cold workability increased with adding trace elements such as (Ni+B+Co) into the alloy; 3) When the process of favorable heightening technical plasticity of alloy is selected, the cold working performance of the alloy will be enhanced.更多还原