热处理工艺对Ti53311S钛合金组织与性能的影响

研究了低温退火和高温淬火＋时效两种热处理方式对Ti53311S钛合金棒材显微组织与力学性能的影响。实验结果表明：经两种不同热处理制度处理后，均能获得满足Q／XB1517—1998标准要求的Ti53311S钛合金棒材。经650oC低温退火处理后可获得等轴a＋β组织，经高温淬火＋时效处理后可获得等轴初生a＋含针状a的转变β双态组织。在生产中，可根据实际情况选取更为适宜的热处理方式，其中，较为经济的热处理方式为650℃×60min／AC；可获得较好力学性能的热处理方式为980℃×（30～90）min／WQ＋650℃×6h／AC。

Effect of Heat Treatment on Microstructure and Mechanical Properties of Ti53311S Titanium Alloy

Low temperature annealing and high temperature quenching combines with aging were two common heat treatment processes, and the effects of these processes on microstructure and mechanical properties of Ti53311S titani- um alloy were investigated. The results show that properties of Ti53311S titanium bars processed by them both can meet the standard of Q/XB 1517--1998. Equiaxial primary a ＋β structure is obtained at the 650 ℃ annealing. When quenched at high temperature and aged at 650℃, the microstructure is double phase. The proper heat treatment process can be selected by the situation, the more economical heat treatment processing is 650 ℃ × 60 min/AC, and better mechanical properties can be obtained by using 980℃ ×（30 - 90） min/WQ ＋ 650℃ × 6 h/AC.