(西北有色金屬研究院， 西安 710016)
摘 要: 采用金相、 X射線衍射和透射電鏡研究了Ti-V-Cr阻燃鈦合金的微觀組織,利用金屬液滴實(shí)驗(yàn)法測(cè)試了合金的阻燃性能。 結(jié)果表明：Ti-V-Cr系合金具有很好的阻燃性能。 該系合金為單一的等軸β組織， 不存在第二相析出物， 合金元素V含量升高以及Al的加入并不影響合金的微觀組織特征； 經(jīng)400 ℃, 100 h熱暴露后，合金仍為單一的β組織， 表明Ti-V-Cr系合金的組織結(jié)構(gòu)是穩(wěn)定的。
關(guān)鍵字: 關(guān)鍵詞: 阻燃鈦合金 Ti-25V-15Cr Ti-35V-15Cr 阻燃性能 微觀組織
（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
