Effect of microstructure modification on magnetic and mechanical properties of high-grade non-oriented silicon steel during annealing treatment

Zhong, Bolin; Cheng, Zhaoyang; Volkova, Olena; Zhang, Xiaobin; Liu, Jing

doi:10.1016/j.jmrt.2023.11.173

Journal of Materials Research and Technology

2023

DOI: 10.1016/j.jmrt.2023.11.173

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Effect of microstructure modification on magnetic and mechanical properties of high-grade non-oriented silicon steel during annealing treatment

Bolin Zhong,

Zhaoyang Cheng,

Olena Volkova

et al.

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2024

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Cited by 7 publications

References 25 publications

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Effects of Cu Content on Mechanical and Magnetic Properties of High‐Strength Nonoriented Silicon Steel

Ni,

Cheng,

Jing

et al. 2024

steel research int.

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Drive motors for new energy vehicles require nonoriented silicon steel with high strength and excellent magnetic properties, which are always difficult to balance. In this study, the effects of Cu content on the precipitates, microstructure, and properties of nonoriented silicon steel are investigated. The results show that a dispersed and coherent nanoscale B2 Cu‐rich precipitates are formed when Cu addition is 0.91 wt%, while ε‐Cu precipitates with large size and low number density are formed with higher Cu addition. The nanoscale B2 Cu‐rich precipitates afford a higher precipitation strengthening contribution than the larger ε‐Cu precipitates via cutting mechanism. Concurrently, the nanoscale B2 Cu‐rich precipitates nominally affect the iron loss deterioration. With increasing Cu content, the average grain size decreased, while the favorable λ texture diminished, and the unfavorable γ texture increased. With the combined effect of the grain size, texture, and precipitates, the iron loss increased first slightly and then significantly with further Cu addition, whereas the magnetic induction gradually decreased. The comprehensive properties of the steel are optimal when Cu addition was 0.91 wt%, which yielded a yield strength of 571.2 MPa, an iron loss P1.0/400 of 20.05 W kg−1, and a magnetic induction B5000 of 1.621 T.

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Effects of Cu Content on Mechanical and Magnetic Properties of High‐Strength Nonoriented Silicon Steel

Ni,

Cheng,

Jing

et al. 2024

steel research int.

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High‐Strength Nonoriented Electrical Steel with Excellent Magnetic Properties Accomplished by Cu–Ni Multialloying

Chen,

Cheng,

Wen

et al. 2024

steel research int.

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Nonoriented electrical steel for new energy vehicles should have high strength and excellent magnetic properties simultaneously. However, it is challenging to optimize mechanical and magnetic properties simultaneously during nonoriented electrical steel processing. This article prepares nonoriented electrical steel with high strength and excellent magnetic properties by Cu–Ni alloying, and the evolution of properties of Cu–Ni‐alloyed nonoriented electrical steel during aging and underlining mechanisms is studied. The optimal strength is achieved when aging for 10 min with a yield strength of 773 MPa, where the magnetic induction intensity (B50) is 1.66 T, and the iron loss (P1.0/400) is 18.07 W Kg−1. The optimal strength is attributed to the Cu–Ni recombination, which induces a rapid precipitation of numerous small‐sized Cu‐rich phases within a short period. Besides, the main strengthening mechanisms of the small‐size Cu‐rich phases are modulus strengthening and ordered strengthening. Furthermore, the small‐size Cu‐rich phases with B2 and body‐centered cubic structure in the earlier aging period do not deteriorate the magnetic properties of the steel. Nevertheless, in the late aging period, due to the coarsening of the precipitated Cu‐rich phase with face‐centered cubic structure and the abnormal growth of some grains, the eddy current loss increases, leading to worsen magnetic properties.

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Numerical Simulation of the Solidification Microstructure of Fe-3.0 Pct Non-oriented Silicon Steel Ribbons Prepared by Planar Flow Casting

Chang,

Bao,

Gong

et al. 2024

Metall Mater Trans B

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Effect of microstructure modification on magnetic and mechanical properties of high-grade non-oriented silicon steel during annealing treatment

Cited by 7 publications

References 25 publications

Effects of Cu Content on Mechanical and Magnetic Properties of High‐Strength Nonoriented Silicon Steel

Effects of Cu Content on Mechanical and Magnetic Properties of High‐Strength Nonoriented Silicon Steel

High‐Strength Nonoriented Electrical Steel with Excellent Magnetic Properties Accomplished by Cu–Ni Multialloying

Numerical Simulation of the Solidification Microstructure of Fe-3.0 Pct Non-oriented Silicon Steel Ribbons Prepared by Planar Flow Casting

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