(西北有色金属研究院， 西安 710016)
摘 要: 采用金相、 X射线衍射和透射电镜研究了Ti-V-Cr阻燃钛合金的微观组织,利用金属液滴实验法测试了合金的阻燃性能。 结果表明：Ti-V-Cr系合金具有很好的阻燃性能。 该系合金为单一的等轴β组织， 不存在第二相析出物， 合金元素V含量升高以及Al的加入并不影响合金的微观组织特征； 经400 ℃, 100 h热暴露后，合金仍为单一的β组织， 表明Ti-V-Cr系合金的组织结构是稳定的。
关键字: 关键词: 阻燃钛合金 Ti-25V-15Cr Ti-35V-15Cr 阻燃性能 微观组织
（Northwest Institute for Nonferrous Metal Research,Xi'an 710016, P. R. China）
Abstract:Titanium alloys may be ignited and burnt under some special conditions. In order to reduce burning rate and improve the safety of flight, burn resistant titanium alloys have been developed. The microstructures of Ti-V -Cr burn resistant titanium alloys were studied by means of OM, XRD and TEM. The burn resistant behavior was examined by using metal liquid drop method. The results indicate that Ti-V-Cr alloys have good burn resistant properties, and they are single equiaxed β structures without second phase precipitates. Increasing of V content and addition of Al do not influence their microstructures. The single β structures still remain even after exposure at 400 ℃ for 100 h, showing that the structures of Ti-V-Cr alloys are stable.
Key words: burn resistant titanium alloy Ti-25V-15Cr Ti-35V-15Cr
burn resistant properties microstructures
