对Ti35合金厚壁管材最后一道次的冷加工变形量及热处理温度对其室温、100℃、150℃力学性能及显微组织的影响进行分析。结果表明：在最后一道次冷加工变形量相同的条件下，随热处理温度的升高， Ti35合金管材的强度降低，延伸率增加；在热处理温度相同的条件下，随变形量的增加管材强度增加，但变形量为36％的管材室温延伸率远高于变形量为41％、52％的管材；最后一道次冷加工变形量为41％、52％时，经600、650℃热处理后，均可获得力学性能优异的成品管材，且晶粒为均匀细小的等轴晶。
Effects of deformation at last rolling pass and heat treatment temperature on microstructures and mechanical properties of Ti35 alloy tubes with thick-wall at room temperature, 100℃and 150℃were analyzed.Results show that when has the same last rolling pass deformation, the strength decreases but elongation increases with heat treatment temperature increases.When has the same heat treatment temperature, strength increases with deformation increases, but the elongation of deformation of 36% is way better than those of 41% and 52%.After annealing at 600 ℃ and 650℃, the microstructure of deformation of 41%and 52%are small and equiaxed, and can obtain better properties.
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