Numerical study of heat transfer and solidification behavior of gas-atomized Fe-6.5%Si (mass fraction) droplets

doi:10.1007/s40436-016-0141-x

Advances in Manufacturing ›› 2016, Vol. 4 ›› Issue (2): 150-156.doi: 10.1007/s40436-016-0141-x

Numerical study of heat transfer and solidification behavior of gas-atomized Fe-6.5%Si (mass fraction) droplets

Ke-Feng Li, Yun-Hu Zhang, Chang-Jiang Song, Qi-Jie Zhai

State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, People's Republic of China

收稿日期:2015-07-15 修回日期:2016-05-03 出版日期:2016-06-25 发布日期:2016-06-25
通讯作者: Chang-Jiang Song E-mail:riversxiao@163.com

Numerical study of heat transfer and solidification behavior of gas-atomized Fe-6.5%Si (mass fraction) droplets

Ke-Feng Li, Yun-Hu Zhang, Chang-Jiang Song, Qi-Jie Zhai

State Key Laboratory of Advanced Special Steel, School of Materials Science and Engineering, Shanghai University, Shanghai 200072, People's Republic of China

Received:2015-07-15 Revised:2016-05-03 Online:2016-06-25 Published:2016-06-25

摘要/Abstract

摘要：

During spray atomization process, the heat transfer and solidification of droplets play very important roles for the deposition quality. Due to the difficulties of experimental approach, a numerical model is developed, which integrates liquid undercooling, nucleation recalescence and post-recalescence growth to present the full solidification process of Fe-6.5%Si (mass fraction) droplet. The droplet velocity, temperature, cooling rate as well as solid fraction profiles are simulated for droplets with different sizes to demonstrate the critical role of the size effect during the solidification process of droplets. The relationship between the simulated cooling rate and the experimentally obtained secondary dendrite arm spacing is in excellent agreement with the well-established formula. The pre-constant and exponent values lie in the range of various rapid solidified Fe-based alloys reported, which indicates the validity of the numerical model.

关键词: Fe-6.5%Si (mass fraction) alloy, Gas atomization, Solidification, Heat transfer, Numerical simulation

Abstract:

Key words: Fe-6.5%Si (mass fraction) alloy, Gas atomization, Solidification, Heat transfer, Numerical simulation

Ke-Feng Li, Yun-Hu Zhang, Chang-Jiang Song, Qi-Jie Zhai. Numerical study of heat transfer and solidification behavior of gas-atomized Fe-6.5%Si (mass fraction) droplets[J]. Advances in Manufacturing, 2016, 4(2): 150-156.

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Numerical study of heat transfer and solidification behavior of gas-atomized Fe-6.5%Si (mass fraction) droplets

Numerical study of heat transfer and solidification behavior of gas-atomized Fe-6.5%Si (mass fraction) droplets

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