钛合金叶片盘近净热流变成形的数值模拟及其应用  

Numerical simulation and its application research on near-precision thermo-rheological forming of the titanium alloy vane disk

作　　者：罗迎社[1] 余敏[1] 李倩妹[1] 殷水平[1] 汪诚[2] 

机构地区：[1]中南林业科技大学流变力学与材料工程研究所,长沙410004 [2]湘潭大学基础力学与材料工程研究所,湘潭411105

出　　处：《塑性工程学报》2009年第4期73-78,共6页Journal of Plasticity Engineering

基　　金：高等学校博士学科点专项科研基金资助项目(200805380004);国家教育部科技重点资助项目(02103);湖南省自然科学基金资助项目(03JJY3007);湖南省优秀博士学位论文专项奖励资助项目(湘财教指[2003]48号)

摘　　要：研究了TC11钛合金叶片盘的近净热流变成形。采用几何造型软件UG NX3对TC11钛合金第二级叶片盘的坯料和模具进行实体造型,同时基于刚粘塑性不可压缩材料的变分原理,运用体积分析软件DEFORM 3D对3种不同应变速率下的叶片盘等温近净热流变成形过程进行数值模拟,研究了工件在成形过程中的速度场、温度场和等效应变场的分布情况,以及凸模和凹模的载荷-行程曲线,为优化工艺参数提供了理论依据。同时与传统的方法进行了比较,发现用此方法生产的产品,其力学性能及微结构都有明显的改进。结果分析表明,随着变形速率的减小,金属向凹模型腔内的流动越均匀,叶型更容易充满。Abstract： The near-precision thermo-rheological forming of the TC11 titanium alloy vane disk has been studied. The dies of rheological forming were 3D-modeled based on UG and the near-precision thermo-rheological forming of the TCll titanium alloy under a certain temperature and a low strain rate was analyzed by DEFORM 3D based on variation principle of rigid viscoplastic non- compressed material： A series of results including rheological forming procedure, equivalent strain field, temperature field and load-stroke curves of punch and concave die, were obtained by finite element method. The deformation characteristic of the TC11 titanium alloy was well known and its thermo-rheological forming process and parameters were determined. Moreover, the mechanical properties and microstructures of the products produced by this new technique are improved evidently compared with that produced by traditional method.

关 键 词：TC11钛合金 近净热流变成形 应变速率 三维造型 数值模拟 DEFORM 3D 

分 类 号：V261.3[航空宇航科学与技术—航空宇航制造工程]