(1. 西北工业大学 凝固技术国家重点实验室，西安 710072；
2. 北京航空材料研究院，北京 100095)
摘 要: 采用热膨胀法和金相法研究近α钛合金Ti60溶解动力学和固溶组织特征。结果表明：快速加热使得α相开始溶解温度升高，溶解速率加快；两相区固溶时α相发生溶解和球化，其形貌由等轴状转变为椭球或条状，形成细小、弥散的α相颗粒；随后在熟化过程中形成大小不一的初生α相。
关键字: 高温钛合金；快速升温；相变动力学；固溶组织；初生α相
（1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
2. Beijing Institute of Aeronautical Materials, Beijing 100095, China）
Abstract:Analysis of α phase solution kinetics and solution microstructure characteristics were carried out by dilatometry and microscopic test. The results indicate that rapid heating treatment increases transformation temperature and velocity of α phase solution. Evolution of α phase during solution treatment includes solution, spheroidization, the shape of primary α phase changes from equiaxial to ellipsoidal or bar shapes, and finally small dispersed α particles. After that, primary α phases with different sizes form during ripening.
Key words: high temperature titanium alloy; rapid heating; kinetics of phase transformation; solution microstructure; primary α phase
