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用Ｇｌｅｅｂｌｅ１５００热模拟机研究了双温循环热处理对铸态ＴｉＡｌ基合金显微组织的影响。结果表明，用双温循环热处理可显著细化铸态合金的晶粒尺寸，最小平均晶粒尺寸可达１０μｍ左右，且晶粒大小均匀；新晶粒主要在晶界形核，并逐步向晶内扩展。经循环热处理后的样品，比铸态硬度提高３００～９００ＭＰａ。
Using Gleeble1500 thermal simulator to study the effect of dual-temperature cycle heat treatment on the microstructure of as-cast TiAl-based alloy. The results show that the grain size of the as-cast alloy can be remarkably refined by the dual-temperature cycle heat treatment. The minimum average grain size can reach about 10μm, and the grain size is uniform. The new grains mainly nucleate in the grain boundaries, Within the expansion. After the cycle of heat treatment of the sample, than the casting hardness increased by 300 ~ 900MPa.