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用示差扫描量热仪研究了Ni含量和固溶时效处理对Ti100-xNix(x=33.3-75)合金相变类型和相变温度的影响。结果表明,固溶淬火态Ti100-xNix合金发生B2→B19′一阶段相变,x=40-49时,合金相变温度(TM)保持恒定不变,x=49-52时急剧下降,x=52-56时逐渐升高,x=56-70时又保持不变。Ti100-xNix合金在773K时效3.6ks和36ks后,x=40～50.5时,合金发生B2→B19′一阶段相变,随着x的增加,TM先保持不变,然后突然下降;x=50.5-52时,合金发生B2→R→B19′两阶段相变,随着x的增加,TM逐渐下降;x=53-70时,合金发生三阶段相变,随着x的增加,相变温度TM1和TM2先升高,后趋于恒定值。Ti100-xNix合金在773K时效360ks后,除了x=51合金发生B2→R→B19′两阶段相变和x=53合金发生三阶段相变比较特殊外,其余合金都发生B2→B19′一阶段相变。
The effects of Ni content and solution treatment on the phase transition temperature and phase transition temperature of Ti100-xNix (x = 33.3-75) alloy were investigated by differential scanning calorimetry. The results show that the first phase of B2 → B19 ’transformation occurs in the solution-quenched Ti100-xNix alloy, and the phase transition temperature (TM) remains constant at x = 40-49, decreases sharply at x = 49-52, and x = 52-56 gradually increased, while x = 56-70 remained unchanged. After aging at 773K for 3.6ks and 36ks, the phase transition of B2 → B19 ’occurs at x = 40 ~ 50.5 for Ti100-xNix alloy. TM keeps unchanged first and then suddenly drops when x increases; x = 50.5 -52, the phase transition of B2 → R → B19 ’occurs in the alloy. With the increase of x, the TM gradually decreases. When x = 53-70, the alloy undergoes three-phase transformation. With the increase of x, the phase transition temperature TM1 and TM2 first increased, then tends to a constant value. Except for the phase transition of B2 → R → B19 ’occurring in x = 51 alloy and the three-phase transformation of x = 53 alloy being rather special in Ti100-xNix alloy after aging at 773K for a time, Phase change.