Study on the Evolution of Layered Heterogeneous Microstructure of Fe-3%Si Alloys Strip Continuous Casting Plate During Heat Treatment by Phase Field Simulation
YANG Yufang1,*, HU Jinlong2, LIU Yongbo2, WANG Mingtao2
1 School of Mechanical Engineering and Automation, Shenyang Institute of Technology, Fushun 113122, Liaoning, China 2 School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China
Abstract: Based on the microstructural characteristics of Fe-3%Si alloy strip continuous casting plates, a phase field model was employed to investigate the coarsening process driven by grain boundary curvature in alloy systems with varying combinations of columnar/equiaxed grains at 1 253 K. Aquantitative analysis was conducted to evaluate the impact of layered microstructure on the evolution process of strip continuous casting plates. The results indicate that when the ratio of the length to diameter of the columnar grain is high, equiaxed grains eventually form under the influence of grain boundary curvature, while the degree of equiaxation decreases with a low initial ratio. The study elucidates the evolution characteristics of different microstructures and reveals that the equiaxed level varies with the initial microstructure features. The phenomenon is attributed to the curvature change induced by equiaxed grains at both ends of the columnar ones, which leads to the mutual ‘engulfment' of columnar grains and equiaxation. In some cases, columnar grains maintain their columnar characteristics by growing to the surface of the strip steel. This study dee-pens our understanding of the evolution process in strip continuous casting plates during heat treatment and provides important theoretical and practical guidance for the optimization of silicon steel preparation processes.
杨玉芳, 胡晋龙, 刘永博, 王明涛. Fe-3%Si合金薄带连铸板热处理过程层状异构组织演变的相场模拟研究[J]. 材料导报, 2024, 38(11): 22110098-7.
YANG Yufang, HU Jinlong, LIU Yongbo, WANG Mingtao. Study on the Evolution of Layered Heterogeneous Microstructure of Fe-3%Si Alloys Strip Continuous Casting Plate During Heat Treatment by Phase Field Simulation. Materials Reports, 2024, 38(11): 22110098-7.
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2024, Vol. 38 
