TB10钛合金筒体反挤压成形的有限元模拟  

FEM simulation of backward extrusion process of TB10 titanium alloy cylinder

作　　者：程奔[1] 叶文君[1] 惠松骁[1] 

机构地区：[1]北京有色金属研究总院有色金属材料制备加工国家重点实验室,北京100088

出　　处：《锻压技术》2009年第5期162-166,共5页Forging & Stamping Technology

摘　　要：通过热模拟实验得到TB10钛合金的流动应力-应变曲线,应用DEFORM-3D软件建立材料模型。基于刚塑性有限元法,对TB10钛合金筒体反挤压过程进行数值模拟。分析了挤压过程的载荷-行程曲线,以及坯料内部的温度、速度、应力、应变等的分布,并对模拟过程中的误差来源做了分析。研究表明,在摩擦因子较小(m=0.1)的情况下,挤压载荷较为稳定,筒壁处金属流动速度均匀,但局部变形不均和应力集中可能在表面形成裂纹。The flow stress-strain curves of TB10 titanium alloy were obtained using a hot simulated method, and the material model was built by the software DEFORM-3D. Based on rigid-plastic finite element method, backward extrusion process of TB10 titanium alloy cylinder was simulated numerically. The load-stroke curve of extrusion process and the distribution of temperature, velocity, stress and strain of the billet were analyzed. The error sources during simulation were also analyzed. The results show that the extrusion load is stable and the metal flow velocity of the cylindrical wall is equally distributed under a low friction factor condition （m=0.1）. But in some local areas, uneven deformation and stress concentration may lead to cracks formation.

关 键 词：TB10钛合金 反挤压 刚塑性有限元 

分 类 号：TG376[金属学及工艺—金属压力加工]