Numerical Simulation of Molten Fluid Behavior During Vacuum Arc Remelting Process
Vacuum arc remelting (VAR) is one of the principal secondary remelting technologies for producing titanium alloys, nickel-based superalloys and other high-value added alloys due to many advantages such as lower cost,higher efficiency and easier to operate,but there are still some problems resulting in structure defects and inhomogeneous component in VAR ingots. Therefore.it is crucial in controlling the fluid behavior in molten pool during the whole process, which has the direct relationship with the metallurgical structure and the component of ingots. The VAR process involves complex interactions of the electromagnetic,flow,and heat transfer processes, which have important effect on the fluid behavior in the molten pool. Mathematical modeling is a scientific and cost-effective approach for developing a fundamental understanding of the governing physical processes and predicting the effects of various operating parameters on process performance. This article describes a model of the VAR process that includes electromagnetic, temperature field and fluid field with ANSYS software. The results indicate that the fluid zone is determined mainly by the temperature field The fluid orientation is decided by the competition of buoyancy forces and Lorentz forces. The parameters such as remelting current and melt rate also been discussed in the present paper.
Vacuum arc remelting temperature field electromagnetic field fluid field ,ANSYS software
Xiaohua Zhao Jinshan Li Hongchao Kou Zhijun Yang Rui Hu Lian Zhou
State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xian 710072,China
国际会议
The 12th World Conference Titanium(第十二届世界钛会 Ti-2011)
北京
英文
96-100
2011-06-19（万方平台首次上网日期，不代表论文的发表时间）