(1. 西安建筑科技大学 冶金工程学院，西安 710055；2. 西北有色金属研究院 钛合金研究所，西安 710016)
摘 要: 研究了TC18钛合金的室温拉伸性能与α+β相区固溶温度和时效温度的关系。结果表明：在时效前，随固溶温度的升高，合金的强度和塑性均下降；在同一时效温度处理后，随固溶温度的升高，合金的强度提高，塑性下降，同时时效强化效果提高；在同一固溶温度处理后，随时效温度的升高，合金的强度下降，塑性提高。合金性能的上述变化与热处理后组成相的参数差异有关。
关键字: TC18钛合金；固溶；时效；拉伸性能
room-temperature tensile properties of TC18 titanium alloy
（1. School of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, China;
2. Titanium Alloy Research Center, Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China）
Abstract:The relationships between room-temperature tensile properties of TC18 titanium alloy and solution (α+β phase region) as well as aging temperatures were investigated. It is found that with the increase of the solution temperature, both the strength and plasticities decrease before aging treatment, the strengths increase and the plasticities decrease after aging at a same temperature, and the aging strengthening effect increases. After solution at a same temperature, with the increase of the aging temperature, the strengths decrease and the plasticities increase. The above changes of the properties result from the different parameters of phases after heat treatment.
Key words: TC18 titanium alloy; solution treatment; aging; tensile properties
