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研究了铸造Ｔｉ－４７Ａｌ－ＸＲｕ（ａｔ％）（Ｘ＝０．５，１，３）合金的显微组织。结果表明，Ｒｕ与Ｃｒ相似，是很强的β稳定元素，促进β２相形成。β２相是含Ｒｕ量高达１０ａｔ％的富Ｒｕ相。含１ａｔ％Ｒｕ的合金在１１６０～１２００℃温度范围热处理时不断析出粒状次生β２相，破坏了γ＋α２片状组织，同时形成了新的γ晶粒。经１２００℃，４８ｈ处理后可得到平均晶粒尺寸小于６０μｍ的γ晶，因此，Ｔｉ－４７Ａｌ－１Ｒｕ合金是可热处理细化晶粒的铸造合金。当Ｒｕ量增加至３ａｔ％时，合金难于热处理细化晶粒，而且合金明显脆化。
The microstructure of the as-cast Ti-47Al-XRu (at%) (X = 0.5,1,3) alloy was investigated. The results show that Ru is similar to Cr, which is a strong β-stable element and promotes the formation of β2 phase. The β2 phase is an Ru-rich phase containing up to 10 at% of Ru. The alloy containing 1at% Ru continuously precipitated the granular secondary β2 phase during the heat treatment at the temperature range of 1160 ~ 1200 ℃, destroying the γ + α2 lamellar structure and forming new γ grains. After 1200 ℃, 48h treatment can get the average grain size less than 60μm γ crystal, therefore, Ti-47Al-1Ru alloy is heat-treated grain refinement of the cast alloy. When the amount of Ru increases to 3at%, the alloy is hard to heat-treat the refined grains, and the alloy is obviously embrittled.