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Effect of annealing temperature on magnetic and mechanical properties of twin-roll strip casting Cu-bearing non-oriented electrical steel

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Abstract

The as-cast sheet of Cu-bearing non-oriented electrical steel with a width of 300 mm and a thickness of 2.4 mm was prepared by the twin-roll strip casting process. The effects of nucleation and growth of recrystallized grains at different annealing temperatures on the evolution of the microstructure and texture of annealed sheet were studied. In addition, the magnetic and mechanical properties of the final sheets were analyzed. The results show that the shear band in the cold-rolled sheet can promote the formation of {100} texture at the initial stage of recrystallization, regardless of high or low-temperature annealing. The combination of low-temperature nucleation and subsequent high-temperature growth is more conducive to the formation of strong {100} texture and has higher preparation efficiency than only through low-temperature annealing. It also indirectly indicates that moderate nucleation and preferential growth are important for the formation of strong beneficial texture. Combined with the subsequent aging treatment, the low-temperature nucleation sheet can obtain an excellent match between mechanical properties and magnetic properties.

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Acknowledgements

The authors acknowledge the National Natural Science Foundation of China (Nos. 52174355, 51701021, 51974032), the China Postdoctoral Science Foundation funded project (No. 2021M693904 and 2022T150074) and the Science and Technology Development Program of Jilin Province (No. 20200401022GX).

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Authors and Affiliations

  1. Key Laboratory of Advanced Structural Materials of Ministry of Education, Changchun University of Technology, Changchun, 130012, China

    Yanqing Xu, Guoqing Zu, Jiangnan Liang, Ying Han, Weiwei Zhu, Yu Zhao & Xu Ran

  2. CRRC Changchun Railway Vehicles Co, Ltd, Changchun, 130000, China

    Guoqing Zu

  3. School of Metallurgy, Northeastern University, Shenyang, 110819, China

    Guoqing Zu

  4. College of Mechatronics Engineering, Binzhou University, Binzhou, 256600, China

    Yuqian Wang

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Xu, Y., Zu, G., Liang, J. et al. Effect of annealing temperature on magnetic and mechanical properties of twin-roll strip casting Cu-bearing non-oriented electrical steel. J Mater Sci 58, 1783–1797 (2023). https://doi.org/10.1007/s10853-022-08097-5

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