Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental study on thermodynamic coupling in cross wedge rolling performing for Ti-6Al-4V blade

Authors： Huang Xiaomin Wang Baoyu Li Junling Ji Hongchao Liu Jinping

Unit： University of Science and Technology Beijing

KeyWords： cross wedge rolling titanium alloy Ti-6Al-4V blade thermodynamic coupling numerical simulation

ClassificationCode：TG335.19

year,vol(issue):pagenumber：2018,43(4):70-76

Abstract：

According to the characteristics of blade, a new technology of cross wedge rolling (CWR) for Ti-6Al-4V blade was put forward. Firstly, the thermal simulation experiment of titanium alloy Ti-6Al-4V was conducted, and the thermal deformation constitutive equation of Ti-6Al-4V was obtained. Then, the forming process was numerically simulated by the finite element software Deform-3D based on thermodynamic coupling, and the distribution regulations of metal flow, temperature, stress and strain during the forming process were analyzed. The results show that in the forming process of titanium alloy Ti-6Al-4V, the speed of metal flow is not the same at different positions of rolling pieces, and the metal flows fast on the surface and slow in the core. From the view of temperature change of rolling pieces, it is gradually decreases from the middle symmetry plane to both ends along the axial direction, and it is gradually decreases from the core to the surface along the radial direction. Furthermore, along the three directions of broadening stage, the forces are 1.5, 2 and 5 kN respectively, and the maximum rolling torque is 4500 N·m in the rolling process. Finally, the experiment verification of Ti-6Al-4V blade is conducted by H500 cross wedge rolling mill which indicates that the process of CWR preforming of Ti-6Al-4V blade is feasible.

Funds：

国家自然科学基金资助项目(51505026，51375042)；中央高校基本科研业务费专项资金资助项目（FRF-BD-17-003A）

黄晓敏（1986-），女，硕士研究生；E-mail：hxm8606@126.com；通讯作者：王宝雨（1964-），男，博士，研究员，博士生导师；E-mail：bywang@ustb.edu.cn

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