Numerical Simulation Research on Wide Casting Nozzle of Twin-Roll Magnesium Alloy

Abstract:

Casting nozzle structure is the decision factor for the formation process of the fluid field of magnesium alloys melt, and the distribution uniformity of the casting nozzle has an important influence on the process stability and the billet quality. In this research, the casting nozzle structures used in producing AZ31 magnesium alloys slab with width of 1500 mm by using horizontal twin-roll continuous casting were taken as research object, and the fluid field of magnesium alloy melt in different casting nozzle structures were simulated, and the influences of the numbers, position, shape and size of the divergent fluid block on the fluid velocity were analyzed. The results show that the fluid velocity distribution obtained by seven divergent fluid blocks were superior to five or three divergent fluid blocks, the streamline divergent fluid blocks were superior to the linear ones, and the small divergent fluid blocks were superior to big ones. At the same time, a new casting nozzle structure was presented, the difference between the maximum and minimum fluid velocity by using the new casting nozzle was 4.69%, and the distribution uniformity of fluid velocity meets the requirement of production.

• Periodical: Materials Science Forum (Volumes 747-748)
• Pages: 404-411
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.747-748.404
• Online since: February 2013
• Authors: Xiao Ping Liang, Sang Sang Liao, Lei Xiao, Bin Jiang
• Keywords: Casting Nozzle, Divergent Fluid Block, Fluid Field, Magnesium Alloy, Twin-Roll Continuous Casting

References

[1] H.J. Hu, D.F. Zhang, M.B. Yang. Numerical simulation of thermal stress in cast billets made of AZ31 magnesium alloy during direct-chill casting, Journal of Manufacturing Processes. 2008: 1.

DOI: 10.1016/j.jmapro.2008.12.002

[2] Z.T. Wang, Magnesium plate rolling technology and performance, Nonferrous Metals Processing. 2004: 2-4.

[3] D.Y. JU, X.D. Hu, Effect of casting parameters and deformation on microsture evolution of twin-roll casting magnesium alloy AZ31, Transactions of Nonferrous Metals Society of China. 2006: 1-4.

DOI: 10.1016/s1003-6326(06)60319-1

[4] H.J. Ho, D.F. Zhang, M.B. Yang, Numerical simulation of thermal stress in cast billet made of AZ31 magnesium alloy during direct-chill casting, Journal of manufacturing processes. 2008：1-3.

DOI: 10.1016/j.jmapro.2008.12.002

[5] Huey-Jiuan Lin, Modeling of flow and heat transfer in metal feeding system used in twin roll casting, Department of Materials Science and Engineering, National University, Taiwan. 2004: 2-4.

[6] A.A. Kaya, O. Dutgtgul, S. Ucunvuoglu, Production of 150cm wide AZ31 magnesium sheet by twin roll casting, Trans. Nonferrous Met. Soc. China. 2008：3-4.

DOI: 10.1016/s1003-6326(10)60199-9

[7] W.P. Weng, Q. Chen, H. Zhong. Numerical simulation research on magnesium alloy melt flow in the twin-roll casting nozzle, Special Casting & Nonferrous Alloys. 2008: 1-3.

[8] B. Jiang, P.D. Ding, Twin-roll casting of the magnesium alloy researching and thing, Materials Review. 2005. 8: 2-3.

[9] H.L. Li, Y.W. Xu, A kind of magnesium alloy roll casting method, Application number: 201010153919. 6: 3-4.

[10] Z.X. Qiu, Aluminum metallurgical physical chemistry, Shanghai Scientific and Technical Publishers. 1985. 69-72.