摘要
某钛合金零件是应用于航空工业的重要部件,在锻造过程中由于锻件头部变形较大,整体变形不均匀,如果模具尺寸设计不当,很容易引起锻造缺陷的产生。针对以上情况,本文建立了该钛合金锻件锻造过程的三维热力耦合有限元模型,利用刚粘塑性有限元法,对锻件的变形情况进行了数值模拟,得到了变形过程中锻件的充型情况以及温度场和应力场的场量分布,并对锻造缺陷的成因进行了分析。数值模拟与锻造试验吻合较好,为生产工艺的制定提供了有效的参考。
The titanium alloy workpiece applied in aeronautic industry has a large deformation on head during forging process. Due to the asymmetry of deformation, if the technical scheme is not appropriate, it will possibly result in the appearance of forging defects. In order to solve the problems appearing in production, a 3D coupled thermo-mechanical finite element model for forging process of TCA alloy workpiece is established. The rigid-viscoplastic finite element method is used to simulate the forging process. Based on the simulated results on metal flow and thermomechanical field variables , such as temperature and stress, the cause of forging defects is analyzed. The simulation results agree well with industrial trials, and this study could provide a good reference for forging process planning.
出处
《锻压技术》
CAS
CSCD
北大核心
2007年第1期28-31,共4页
Forging & Stamping Technology
基金
辽宁省航空基金资助项目(2005400201)
关键词
TCA钛合金
锻造
热力耦合
有限元模拟
TCA titanium alloy
forging
thermo-mechanical coupling
FEM simulation
