Optimization of process parameters in twin-roll strip casting of an AZ61 alloy by experiments and simulations

Twin-roll strip casting is an effective technology to produce magnesium alloy strips economically. The aim of this work is to propose suitable (optimized) process parameters for manufacturing AZ61 strips using the twin-roll strip casting technology. Experiments on twin-roll strip casting of an AZ61 magnesium alloy were carried out. Temperature fields, fluid flow fields, and stress fields accompanying the process were simulated using thermal-fluid and thermal-mechanical finite element methods. The effects of casting speed and pouring temperature on temperature fields, fluid flow fields, and stress fields during the process were analyzed. It was found that the optimum pouring temperature should be in the range 690∼715 °C and the optimum casting speed in the range 2.3 and 2.5 m/min.

[1]  Cui Jian-zhong.  Effect of Twin Roll-casting on Microstructure and Performance of Hot Rolling Mg-5.45%Al-1.36%Si Magnesium Alloy Plate , 2009 .

[2]  Zhongyun Fan,et al.  The Impact of Melt-Conditioned Twin-Roll Casting on the Downstream Processing of an AZ31 Magnesium Alloy , 2012, Metallurgical and Materials Transactions A.

[3]  Mihriban Pekguleryuz,et al.  Microstructure and texture studies on twin-roll cast AZ31 (Mg–3 wt.%Al–1 wt.%Zn) alloy and the effect of thermomechanical processing , 2011 .

[4]  Shusen Wu,et al.  Study on the semi-solid rheocasting of magnesium alloy by mechanical stirring , 2002 .

[5]  Hisaki Watari,et al.  Formability of Magnesium Alloy Sheets Manufactured by Semi-Solid Roll Strip Casting , 2004 .

[6]  Cheng Lu,et al.  Optimization and Application of Process Parameters in an AZ61 Alloy Twin-Roll Strip Casting , 2013 .

[7]  Chung-Gil Kang,et al.  Mathematical model for the twin roll type strip continuous casting of magnesium alloy considering thermal flow phenomena , 2007 .

[8]  Hisashi Nishimura,et al.  Formability enhancement in magnesium alloy deep drawing by local heating and cooling technique , 2003 .

[9]  Xiao Dong Hu,et al.  Thermal Flow Simulation on Twin Roll Casting Process for Thin Strip Production of Magnesium Alloy , 2005 .

[10]  Peijie Li,et al.  Coupled analysis of temperature and flow during twin-roll casting of magnesium alloy strip , 2011 .

[11]  Motoo Asakawa,et al.  Twin-roll strip casting of AZ61 magnesium alloy and improvement of formability by structure-control rolling , 2006 .

[12]  Wen-Chi Hwang,et al.  Relationship between Flow Characteristics and Surface Quality in Inclined Twin Roll Strip Casting , 1996 .

[13]  D. Qiu,et al.  Grain refinement of Ca addition in a twin-roll-cast Mg–3Al–1Zn alloy , 2012 .

[14]  Hu Zhao,et al.  Microstructure of asymmetric twin-roll cast AZ31 magnesium alloy , 2011 .

[15]  Toshio Haga,et al.  Melt ejection twin roll caster for the strip casting of aluminum alloy , 2003 .

[16]  J. A. Spim,et al.  Modeling of solidification in twin-roll strip casting , 2000 .

[17]  Nobuhiro Koga,et al.  Feasibility study of twin roll casting process for magnesium alloys , 2007 .

[18]  Huey-Jiuan Lin.  Modelling of flow and heat transfer in metal feeding system used in twin roll casting , 2004 .

[19]  Guodong Wang,et al.  Numerical simulation of the fluid flow, heat transfer, and solidification of twin-roll strip casting , 2006 .

[20]  Nobuhiro Koga,et al.  "Warm Deep Drawing of Wrought Magnesium Alloy Sheets Produced by Semi-Solid Roll Strip Casting Process" , 2006 .

[21]  Peijie Li,et al.  Microstructure and mechanical properties of an asymmetric twin-roll cast AZ31 magnesium alloy strip , 2012 .

[22]  D. Liang,et al.  The twin-roll strip casting of magnesium , 2004 .

[23]  Plato Kapranos,et al.  Billetless simple thixoforming process , 2002 .

[24]  Herbert Pfeifer,et al.  Numerical simulation of the twin-roll casting process of magnesium alloy strip , 2009 .

[25]  Edward Ghali,et al.  Magnesium and Magnesium Alloys , 2011 .

[26]  Toshio Haga,et al.  Strip casting of A5182 alloy using a melt drag twin-roll caster , 2003 .

[27]  Plato Kapranos,et al.  Simple rheocasting processes , 2002 .