【摘要】 采用金相显微镜、透射电镜、化学相分析和力学性能测试等方法，研究了钛含量对ＧＨ１５０合金组织和性能的影响。结果表明，在１．６３％～２．９６％Ｔｉ范围内，随钛含量的提高，γ′相析出量增加，进入γ′相中的钛［Ｔｉ（γ′）］从０．９２％增至２．１７％，可见钛在ＧＨ１５０合金中主要起时效强化作用，并显著影响力学性能。随钛含量的增加，合金的室温屈服强度、７００℃拉伸强度和持久强度均提高，同时固溶状态的室温拉伸塑性和持久塑性下降，这是γ′相和μ相综合作用的结果。更多还原

【Abstract】 The influence of Ti content on the microstructures and mechanical properties of superalloy GH150 was investigated with metalloscope, TEM, chemical phase analysis and mechanical property testing, etc. The result shows that the amount of γ′ precipitation phase inereases with the increase of Ti content when the test Ti content is in the range of 1.63 %～2.96 %, and the quantity of Ti in γ′ phase also increases from 0.92 % to 2.17 %. Therefore, the Ti in GH150 plays the role of strengthening precipitation and affects mechanical properties remarkablly. With the increase of Ti content, ambient yield strength, tensile strength and stressrupture strength of the alloy at 700 ℃ are raised, but its ambient tensile ductility and stressrupture ductility are lowered because of the combined effects of γ′ and μ phases.更多还原