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通过光学显微镜、扫描电镜、X射线衍射仪、室温压缩试验机等研究了固溶温度对形状记忆合金Cu-17.55Al-9.84Mn(物质的量分数/%,下同)和Cu-19.1Al-9.9Mn冷加工性能的影响。结果表明:固溶温度对含17.55%Al合金的冷加工性能影响显著,但对含19.1%Al合金的影响较小;含17.55%Al的合金因铝含量较低,经700℃以上温度固溶后冷至室温获得的β相或18R马氏体具有低的有序度,在应力作用下容易发生马氏体转变或马氏体再取向,其冷加工性能显著好于α+β两相区时的;含19.1%Al合金在不同温度固溶后的冷加工性能显著低于含17.55%Al合金的,因其室温组织主要由有序度高的β相组成。
The effects of solution temperature on the mechanical properties of Cu-17.55Al-9.84Mn (mass fraction /%) and Cu-19.1Al-Cu alloy were investigated by optical microscope, scanning electron microscope, X- Effect of 9.9Mn Cold Workability. The results show that the solution temperature has a significant effect on the cold workability of the alloy containing 17.55% Al, but has little effect on the alloy containing 19.1% Al. The alloy containing 17.55% Al has a low content of aluminum, The β phase or 18R martensite obtained from cold to room temperature has a low degree of order, and tends to undergo martensitic transformation or martensite reorientation under stress, and its cold workability is significantly better than that of the α + β two-phase region . The cold workability of 19.1% Al alloy after solution treatment at different temperatures was significantly lower than that of the Al alloy containing 17.55% Al, because the room temperature microstructure mainly consisted of highly ordered β phase.