Melt flow, solidification structures, and defects in 316 L steel strips produced by vertical centrifugal casting

doi:10.1007/s40436-023-00439-z

Advances in Manufacturing ›› 2023, Vol. 11 ›› Issue (4): 636-646.doi: 10.1007/s40436-023-00439-z

• • 上一篇

Melt flow, solidification structures, and defects in 316 L steel strips produced by vertical centrifugal casting

Li-Bing Liu, Cong-Hui Hu, Yun-Hu Zhang, Chang-Jiang Song, Qi-Jie Zhai

Center for Advanced Solidification Technology, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China

收稿日期:2022-09-07 修回日期:2022-12-06 发布日期:2023-10-27
通讯作者: Yun-Hu Zhang,E-mail:zhangyunhu.zyh@163.com;Chang-Jiang Song,E-mail:riversxiao@163.com E-mail:zhangyunhu.zyh@163.com;riversxiao@163.com
作者简介:Li-Bing Liu received his Master degree in Ferro-metallurgy from Shanghai University in 2016. Now, he is a Ph.D. candidate in the research group of Prof. Chang-Jiang Song in Center for Advanced Solidifcation Technology (CAST) at Shanghai University. His research interests focus on high proformance low-density steels, casting simulation and grain refnement.
Cong-Hui Hu received his B.S. degree in Metal Material Engineering (2016) from Nanchang Hangkong University. Currently, he is a Ph.D. candidate in the research group of Prof. ChangJiang Song in Center for Advanced Solidifcation Technology (CAST) at Shanghai University. His scientific interests focus on the preparation of highentropy alloys.
Yun-Hu Zhang received his Ph.D. in Magnetohydrodynamics from Helmholtz Zentrum Dresden Rossendorf (HZDR) in 2016. He is associate Professor at School of Materials Science and Engineering of Shanghai University from 2018 to present. His research focus is grain refinement in solidified metal alloys driven by pulsed electromagnetic fields and inoculations.
Chang-Jiang Song is professor at School of Materials Science and Engineering of Shanghai University. His research interests mainly focus on metal solidifcation theory, microstructure control, and fabrication of super performance metastable engineering materials through solidifcation process. He has supervised over 20 projects and published more than 100 journal and conference papers.
Qi-Jie Zhai is the professor of the School of Materials Science and Engineering, and the director of the Center for Advanced Solidification Technology (CAST) at Shanghai University. He is vice chairman of the China Foundry Society, director of the China Institute of Foundry Journal Workmen's Committee, and member of the World Foundry Organization (WFO) Ferrous Metals Technical Committee. His research interests focus on the metal solidifcation process, microstructure refinement, pulsed magneto-oscillation (PMO) homogenization technology, and new casting material technology. He has supervised over 80 scientifc research projects and published more than 500 academic papers.
基金资助:
This study was financially supported by the National MCF Energy R&D Program of China (Grant No. 2018YFE0306102) and the National Natural Science Foundation of China (Grant No. 51974184). The authors would like to express their sincere thanks for all the staff support from the Center for Advanced Solidification Technology at Shanghai University.

Melt flow, solidification structures, and defects in 316 L steel strips produced by vertical centrifugal casting

Li-Bing Liu, Cong-Hui Hu, Yun-Hu Zhang, Chang-Jiang Song, Qi-Jie Zhai

Center for Advanced Solidification Technology, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, People's Republic of China

Received:2022-09-07 Revised:2022-12-06 Published:2023-10-27
Contact: Yun-Hu Zhang,E-mail:zhangyunhu.zyh@163.com;Chang-Jiang Song,E-mail:riversxiao@163.com E-mail:zhangyunhu.zyh@163.com;riversxiao@163.com
Supported by:
This study was financially supported by the National MCF Energy R&D Program of China (Grant No. 2018YFE0306102) and the National Natural Science Foundation of China (Grant No. 51974184). The authors would like to express their sincere thanks for all the staff support from the Center for Advanced Solidification Technology at Shanghai University.

摘要/Abstract

摘要： Vertical centrifugal casting can significantly enhance the filling capability of molten metals, enabling the production of complex thin-walled castings at near-rapid cooling rates. In this study, the melt flow, solidification structures, and defects in 316 L steel cast strips with a geometry of 80 mm×60 mm×2.5 mm produced by vertical centrifugal casting were numerically and experimentally analyzed under different rotation speeds. With gradually increasing the rotation speed from 150 r/min to 900 r/min, the simulated results showed the shortest filling time and minimum porosity volume in the cast strip at a rotation speed of 600 r/min. Since a strong turbulent flow was generated by the rotation of the mold cavity during the filling process, experimental results showed that a “non-dendritic” structure was obtained in 316 L cast strip when centrifugal force was involved, whereas the typical dendritic structure was observed in the reference sample without rotation. Most areas of the cast strip exhibited one-dimensional cooling, but three-sided cooling appeared near the side of the cast strip. Moreover, the pores and cracks in the 316 L strips were detected by computed tomography scanning and analyzed with the corresponding numerical simulations. Results indicated the existence of an optimal rotational speed for producing cast strips with minimal casting defects. This study provides a better understanding of the filling and solidification processes of strips produced by vertical centrifugal casting.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-023-00439-z

关键词: Vertical centrifugal casting, Numerical simulation, Melt flow, Solidification behavior

Abstract: Vertical centrifugal casting can significantly enhance the filling capability of molten metals, enabling the production of complex thin-walled castings at near-rapid cooling rates. In this study, the melt flow, solidification structures, and defects in 316 L steel cast strips with a geometry of 80 mm×60 mm×2.5 mm produced by vertical centrifugal casting were numerically and experimentally analyzed under different rotation speeds. With gradually increasing the rotation speed from 150 r/min to 900 r/min, the simulated results showed the shortest filling time and minimum porosity volume in the cast strip at a rotation speed of 600 r/min. Since a strong turbulent flow was generated by the rotation of the mold cavity during the filling process, experimental results showed that a “non-dendritic” structure was obtained in 316 L cast strip when centrifugal force was involved, whereas the typical dendritic structure was observed in the reference sample without rotation. Most areas of the cast strip exhibited one-dimensional cooling, but three-sided cooling appeared near the side of the cast strip. Moreover, the pores and cracks in the 316 L strips were detected by computed tomography scanning and analyzed with the corresponding numerical simulations. Results indicated the existence of an optimal rotational speed for producing cast strips with minimal casting defects. This study provides a better understanding of the filling and solidification processes of strips produced by vertical centrifugal casting.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-023-00439-z

Key words: Vertical centrifugal casting, Numerical simulation, Melt flow, Solidification behavior

Li-Bing Liu, Cong-Hui Hu, Yun-Hu Zhang, Chang-Jiang Song, Qi-Jie Zhai. Melt flow, solidification structures, and defects in 316 L steel strips produced by vertical centrifugal casting[J]. Advances in Manufacturing, 2023, 11(4): 636-646.

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Melt flow, solidification structures, and defects in 316 L steel strips produced by vertical centrifugal casting

Melt flow, solidification structures, and defects in 316 L steel strips produced by vertical centrifugal casting

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