Jie Ma, Bo Wang, Zhi-liang Yang, Guang-xin Wu, Jie-yu Zhang, and Shun-li Zhao, Microstructure simulation of rapidly solidified ASP30 high-speed steel particles by gas atomization, Int. J. Miner. Metall. Mater., 23(2016), No. 3, pp. 294-302. https://doi.org/10.1007/s12613-016-1238-8
Cite this article as:
Jie Ma, Bo Wang, Zhi-liang Yang, Guang-xin Wu, Jie-yu Zhang, and Shun-li Zhao, Microstructure simulation of rapidly solidified ASP30 high-speed steel particles by gas atomization, Int. J. Miner. Metall. Mater., 23(2016), No. 3, pp. 294-302. https://doi.org/10.1007/s12613-016-1238-8
Jie Ma, Bo Wang, Zhi-liang Yang, Guang-xin Wu, Jie-yu Zhang, and Shun-li Zhao, Microstructure simulation of rapidly solidified ASP30 high-speed steel particles by gas atomization, Int. J. Miner. Metall. Mater., 23(2016), No. 3, pp. 294-302. https://doi.org/10.1007/s12613-016-1238-8
Citation:
Jie Ma, Bo Wang, Zhi-liang Yang, Guang-xin Wu, Jie-yu Zhang, and Shun-li Zhao, Microstructure simulation of rapidly solidified ASP30 high-speed steel particles by gas atomization, Int. J. Miner. Metall. Mater., 23(2016), No. 3, pp. 294-302. https://doi.org/10.1007/s12613-016-1238-8
In this study, the microstructure evolution of rapidly solidified ASP30 high-speed steel particles was predicted using a simulation method based on the cellular automaton-finite element (CAFE) model. The dendritic growth kinetics, in view of the characteristics of ASP30 steel, were calculated and combined with macro heat transfer calculations by user-defined functions (UDFs) to simulate the microstructure of gas-atomized particles. The relationship among particle diameter, undercooling, and the convection heat transfer coefficient was also investigated to provide cooling conditions for simulations. The simulated results indicated that a columnar grain microstructure was observed in small particles, whereas an equiaxed microstructure was observed in large particles. In addition, the morphologies and microstructures of gas-atomized ASP30 steel particles were also investigated experimentally using scanning electron microscopy (SEM). The experimental results showed that four major types of microstructures were formed: dendritic, equiaxed, mixed, and multi-droplet microstructures. The simulated results and the available experimental data are in good agreement.
In this study, the microstructure evolution of rapidly solidified ASP30 high-speed steel particles was predicted using a simulation method based on the cellular automaton-finite element (CAFE) model. The dendritic growth kinetics, in view of the characteristics of ASP30 steel, were calculated and combined with macro heat transfer calculations by user-defined functions (UDFs) to simulate the microstructure of gas-atomized particles. The relationship among particle diameter, undercooling, and the convection heat transfer coefficient was also investigated to provide cooling conditions for simulations. The simulated results indicated that a columnar grain microstructure was observed in small particles, whereas an equiaxed microstructure was observed in large particles. In addition, the morphologies and microstructures of gas-atomized ASP30 steel particles were also investigated experimentally using scanning electron microscopy (SEM). The experimental results showed that four major types of microstructures were formed: dendritic, equiaxed, mixed, and multi-droplet microstructures. The simulated results and the available experimental data are in good agreement.
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