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研究了热处理及合金元素Ｗ对ＴｉＡｌ合金显微组织的影响，探讨了该合金随温度变化发生的相转变规律．１３００℃热处理时部分溶解的层片组织在随后冷却过程中由α固溶体形成细的层片晶团，而未溶解部分则发生连续和不连续长大而粗化．随着Ｗ含量的增加，不但有序β相增加，而且以多种形态出现，同时层片组织不稳定，易产生双态组织．从合金加热到熔化，再冷却至８００℃的差热分析，结合显微组织的研究，得出该合金的相转变规律为：Ｌ→Ｌ＋β′→α＋β′→α→α＋γ＋β″，最终形成α２＋γ＋β″＋ω＋Ｔｉ５Ｓｉ３的多相组织
The effects of heat treatment and alloying element W on the microstructure of TiAl alloy were studied, and the phase transformation of the alloy with temperature was discussed. Partially dissolved lamellar structure during the heat treatment at 1300 ℃ formed fine layer lamellar lumps from α solid solution during the subsequent cooling, while the undissolved part appeared continuous and discontinuous growth and coarsening. With the increase of W content, not only the ordered β phase increases, but also appear in many forms, at the same time, the lamellar structure is unstable and the bimodal structure is easy to produce. From the alloy heated to melt, and then cooled to 800 ℃ differential thermal analysis, combined with the study of the microstructure, the phase transition law derived for the alloy: L → L + β '→ α + β' → α → α + γ + β “, the final formation of α2 + γ + β” + Ω + Ti5Si3 multi-phase structure