Numerical simulation of molten fluid behavior during vacuum arc remelting process

Xiaohua Zhao, Jinshan Li, Hongchao Kou, Zhijun Yang, Rui Hu, Lian Zhou

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

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.

Original languageEnglish
Title of host publicationTi 2011 - Proceedings of the 12th World Conference on Titanium
Pages96-100
Number of pages5
StatePublished - 2012
Event12th World Conference on Titanium, Ti 2011 - Beijing, China
Duration: 19 Jun 201124 Jun 2011

Publication series

NameTi 2011 - Proceedings of the 12th World Conference on Titanium
Volume1

Conference

Conference12th World Conference on Titanium, Ti 2011
Country/TerritoryChina
CityBeijing
Period19/06/1124/06/11

Keywords

  • AHSYS software
  • Electromagnetic field
  • Fluid field
  • Temperature field
  • Vacuum arc remelting

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