【摘要】 Ti－Ni－Nb三元形状记忆合金较二元合金具有相当宽的相变滞后温度．本文针对Ti44－Ni47－Nb9合金中铌加入量大的特点，采用纯钛、纯镍、纯镍预制中间合金的方法，在磁悬浮水冷坩埚中进行熔炼，成分稳定可靠．经850℃锻造、轧制后，制成内径Φ12管接头．记忆合金管接头的训练在－60℃下进行，总变形量16％，用电阻法测量的相变温度为As=35℃，Ms=-120℃，滞后宽度As－Ms=155℃．还对管接头连接系统的耐水压、拉伸、扭转、疲劳性能进行了测试．更多还原

【Abstract】 Ternary Ti-Ni-Nb alloys have wider transformation hysteresis than binary Ti-Ni alloys. In our experiment, Ti-Ni-Nb alloy was prepared by melting pure titanium , Pure nickel and pure niobium in a cold crucible in a magnertic suspension furnace under a controlled protective argon followed byquenching in an iron mould The hysteresis width under 16% pre-deformation is 155 C. The hydrostatic , tensile, torque, fattigue tests were conducted to evaluate the performance of the pipe coupling system.All the test results indicate excellent behavior and possible applications of Ti-Ni-Nb shape memory alloy in the future .更多还原