钛对GH150合金组织和性能的影响  

Influence of Titanium on Microstructures and MechanicalProperties of Superalloy GH150

作　　者：傅宏镇[1] 王延庆[1] 张旭瑶[1] 董殿生 徐修善 

机构地区：[1]冶金部钢铁研究总院

出　　处：《钢铁研究学报》1998年第4期32-36,共5页Journal of Iron and Steel Research

基　　金：国家14号机重点科研课题

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。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.

关 键 词：钛 高温合金 显微组织 力学性能 

分 类 号：TG132.32[一般工业技术—材料科学与工程]