锻态TB6钛合金的热变形行为和热加工图  

Deformation Behavior and Processing Map of High Temperature Deformation of TB6 Alloy As-forging

作　　者：李妮[1] 赵飞[1] 叶萃[1] 李军帅[1] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550025

出　　处：《热加工工艺》2015年第2期41-43,46,共4页Hot Working Technology

基　　金：贵州省工业公关项目(黔科合GZ字[2012]3004);贵州省科技厅优秀青年科技人才项目(黔科合人字(2013)08号)

摘　　要：采用Gleeble热模拟试验机,对锻态TB6钛合金在变形温度660～1050℃,应变速率0.001～0.1s^＋-1的条件下进行等温恒应变速率压缩试验,研究了TB6钛合金的高温压缩变形行为。基于Prasad判据绘制了该合金的热加工图,结合变形微观显微组织分析,确定了该合金在（α＋β）两相区至β相区的最佳工艺参数。结果表明：当应变速率0.01～0.1s^＋-1,变形温度980℃时,其变形机制为动态回复,失稳现象不明显。最终确定了应变速率为0.001～0.1 s^＋-1,变形温度为815℃左右,为该合金的最佳热加工工艺参数。The hot deformation behavior of TB6 titanium alloy （as-forging） was studied by isothermal constant strain rate compression test on Gleeble thermal simulator at 660℃～1050 ℃ and strain rate of 10^＋-3-10^＋-1s^＋-1. The processing maps of the alloy were constructed based on prasad criterion. Combined with microstructure analysis, the appropriate deformation parameters of the itanium alloy was identified from （α＋β） phase to β phase. The results show that the deformation mechanism of TB6 titanium alloy is dynamic recovery at 980 ℃ and strain rate of 10^＋-2 -10＋^-1s^＋-1, and the flow instability is unobvious. The optimum deformation parameter is optimal at about 815 ℃ and strain rate of 10^＋-3-10^＋-1s^＋-1.

关 键 词：锻态TB6钛合金 热加工图 工艺参数 

分 类 号：TG142.71[一般工业技术—材料科学与工程] TG113.2[金属学及工艺—金属材料]