摘要
采用三维有限元模拟软件DEFORM-3D,对片层态TC11钛合金在近β区多道次反复镦拔过程进行了数值模拟。分析了在不同火次、不同变形阶段时锻件中的温度场、应变场。通过模拟研究得到TC11钛合金多道次镦拔的最佳镦粗比为41%。每次拔长分两次压下,每次压下量为总变形量的50%。最后一火先镦粗到210 mm,将坯料翻转180°再镦粗到140 mm。采用多道次反复镦拔工艺可使初始态为粗大片层态的TC11钛合金转变为均匀的等轴态,能为后续的锻造提供合格的坯料。
The finite element software DEFORM-3D was employed to simulate multi-pass upsetting and stretching of TCll alloy in near β zone. The distribution of temperature and effective strain fields were investigated. Simulation results show that the optimal compression ratio of TC11 is 41% during multi-pass upsetting and stretching. The process of stretching is divided into two steps, and in each step, compression ratio is 50%. In the last pass, the workpiece should be upset to 210 mm first and rotated 180°, then upset to 140 mm, The initial coarse lamellar structure can be transferred to refined equaxied structure through multi-pass upsetting and stretching, which can provide eligible workpiece for the next forging process.
出处
《锻压技术》
CAS
CSCD
北大核心
2009年第1期1-5,共5页
Forging & Stamping Technology
基金
国家自然科学基金资助项目(50775211)
关键词
钛合金
多道次镦拔
数值模拟
titanium alloy
multi-pass forming
numerical simulation
