TC4-DT合金改锻工艺及超塑性变形行为  

Forging pretreatment process and superplastic deformation behavior of TC4-DT alloy

作　　者：喻淼真[1] 王高潮[1] 郑漫庆[1] 王志录 徐雪峰[1] 

机构地区：[1]南昌航空大学航空制造工程学院,南昌330063 [2]中航工业江西景航航空锻铸有限公司,景德镇333400

出　　处：《塑性工程学报》2013年第5期1-6,共6页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51075196);江西省教育厅基金资助项目(GJJ12451)

摘　　要：为研究TC4-DT钛合金的细化机理与超塑性变形行为，采用三维镦拔形变热处理改锻工艺对供货态的TC4-DT合金进行细晶化处理，并在电子拉伸实验机上采用最大m值法对细晶化和供应态的TC4DT进行拉伸实验。结果表明，采用三维镦拔工艺可简单有效的细化TC4-DT合金的原始组织，平均晶粒尺寸由原始组织的70μm细化至15μm；在变形温度850℃-900℃、最大m值法的试验条件下，处理后的TC4DT合金均表现出比供货态超塑性能好，最佳变形温度为870℃，最大延伸率可达到1233％。In order to investigate superplastic deformation behavior and Refinement mechanism of TC4-DT Titanium alloy. In this paper, commercial TC4-DT titanium alloy grain refinement by three-dimensional upsetting and cogging ausform process firstly. Then using Maximum m value superplastic deformation method for fine crystalline superplastic and commercial TC4-DT alloy were studied. The final results show that： Using the three-dimensional upsetting and cogging ausform process refined original grains of TC4-DT alloy simply and effectively, Original average grain size from 70μm refined to 15μm. At the temperature 850℃ -900℃, by using Maximum m value superplastic deformiation method, TC4-DT alloy after composite ausform show better superplasticity than the commercial, the optimum temperature is 870℃, the best elongation can arrive at 1233%.

关 键 词：三维镦拔工艺 TC4-DT合金 细化晶粒 超塑性 

分 类 号：TG319[金属学及工艺—金属压力加工]