Computer Simulation Of Magnesium Alloy Strip Casting Process

In rencent years, as the demand of meatal structural materials and othermanufacture industry’s rapid development, the demand of magnesium alloy isincreasing. However, the poor deformation and difficult processing ofmagnesium make the manufacture cost high and application limited. Thereforethe low energy consumption, short process and low cost technology will bepaied more intention, which can be used to manufacture the wrought magnesium.Twin roller cast-rolling process is in accordance with the requirements. But thereare so many process parameters that if testing and optimizing them through theexperiment, it would waster much time, manpower and wealth during theprocess. The development of computer simulation technology makes theproblems solved. Combined with science and technology innovation project ofShanxi Province, which is magnesium alloy strip cast-rolling technology andequipment development, this paper selects horizontal double roller cast-rollingprocess of AZ31magnesium alloy as the research object and simulate it by usingANSYS Fluent software.According to the characters of this process, from the view of generalizedfluid and the fluid-structure interaction theory, this paper establishes the controlequation of turbulent flow with heat transfer during cast-rolling process, whichcan descripe roll casting, and solve some problems, such as the solid fraction,latent heat of solidification and viscosity.This paper discusses significance of the roll casting process parameters’influence on the temperature fileld in cast-rolling area, which are pouringtemperature, roll casting speed, roll gap, roll diameter and interface heat transfercoefficient, and draws the significant process parameter by usingtwo-dimensional finite element combined with orthogonal analysisi method.This paper uses a three dimensional finite element analytical method toestablish a model of cast-rolling area, roller sleeve and cooling water, analysiseswhich is the best cooling water flow model to cool roller shell and thendiscusses the pouring temperature, the cast-rolling speed, cooling water flow velocity on the influence of the temperature filed in cast-rolling area with thebest cooling water flow model.