钛合金TC4热应力校形的数值模拟  

Numerical Simulation on Hot Sizing of Titanium Alloy TC4

作　　者：周兆锋[1] 陈明和[1] 范平[1] 王荣华[1] 李枫[1] 林尧 

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《南京航空航天大学学报》2009年第5期620-625,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：国家自然科学基金(50275075)资助项目;航空科学基金(03G21008)资助项目

摘　　要：钛合金的屈服强度和弹性模量比值高,故其成形后回弹量大,成形的零件精度低,校形是解决钛合金成形回弹的有效方法。基于商用模拟软件Ansys建立了TC4钛合金高频感应热应力校形的控制模型,利用软件中LS-DYNA求解器,对钛合金热应力校形的过程进行模拟,得出了钛合金高频感应热应力校形中的一些规律和合适的工艺参数,并进行了相关实验验证工作。研究结果表明:所建立的高频感应热应力校形的控制模型得到的模拟结果与实验结果的一致性较好。Due to the high ratio of yield strength and elastic modulus of titanium alloy, it is characterized by high springback level and lower geometrical accuracy. Hot sizing is a new method for solving this problem. In this paper, the control model of the high frequency induction hot sizing of TC4 is established based on the ANSYS software. In the simulation, hot sizing process is performed by using the FEM code LS-DYNA. Finally, some rules and proper parameters are obtained for successful hot sizing of titanium alloy verified by the experiment. Results indicate that the simulation result is in good agreement with the experimental result.

关 键 词：TC4钛合金(Ti-6Al-4V) 热应力校形 高频感应 数值模拟 

分 类 号：TG301[金属学及工艺—金属压力加工]