本文用差示扫描量热法研究了 Cu 对 NiTi 记忆合金马氏体相变点及相变潜热的影响。结果表明,以 Cu 代替 Ni 至30 at.%,合金仍具有良好的记忆性能;合金相变温度及相变潜热值略有变化,相变滞后明显减小;Cu 含量对合金相变类型没有影响。相变潜热值△H 与 T_0=1/2(A_s+M_s)并不存在严格的直线关系。Cu 含量超过7.5at.—%时,合金的热加工性能变差。 In this paper, the effect of Cu on martensite transformation temperature and latent heat of NiTi memory alloy was studied by differential scanning calorimetry. The results show that the alloy has good memory properties with Cu instead of Ni to 30 at.%. The phase transition temperature and the latent heat of the alloy slightly change, but the phase lag obviously decreases. The Cu content has no effect on the alloy phase transformation . There is no strict linear relationship between latent heat value △ H and T_0 = 1/2 (A_s + M_s). When the Cu content exceeds 7.5 at .-%, the hot workability of the alloy deteriorates.