A high-magnetic-induction thin-gauge non-oriented silicon steel sheet and a method for manufacturing the same

By optimizing the chemical composition and preparation process of non-oriented silicon steel sheets, especially the bell-type annealing process, millimeter-scale coarse grains are formed, which solves the contradiction between high magnetic induction and low iron loss in thin-gauge non-oriented silicon steel sheets, and achieves efficient and low-cost production.

CN122279390APending Publication Date: 2026-06-26SHANXI TAIGANG STAINLESS STEEL CO LTD
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Patent Information

Application Number
CN202610319975.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-17
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing technologies struggle to simultaneously improve magnetic induction and reduce iron loss during the fabrication of non-oriented silicon steel sheets, especially in thin-gauge applications, and existing methods often increase production costs or complexity.

Method used

By optimizing the chemical composition and preparation process, and using a bell-type annealing process to control the temperature and time, abnormal grain growth is induced to form millimeter-sized coarse grains. Combined with a single cold rolling and protective atmosphere annealing, a favorable texture is formed, avoiding the addition of precious metals.

Benefits of technology

It achieves high magnetic induction intensity B50=1.76~1.78T and low iron loss P1.0/400≤20.5W/Kg, which simplifies the production process and reduces costs.

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Abstract

This invention discloses a high-magnetic-induction thin-gauge non-oriented silicon steel sheet and its preparation method. The chemical composition of the high-magnetic-induction thin-gauge non-oriented silicon steel sheet is: Si: 0.8~2.0%, Al: 0.10~0.60%, Mn: 0.20~0.80%, P≤0.02%, S≤0.003%, N≤0.003%, C≤0.005%. The preparation method includes the following steps: smelting, continuous casting, hot rolling, bell-type annealing, cold rolling, annealing, and coating. In the bell-type annealing step, the holding temperature is 800~880℃, and the annealing time is 12~36h. This invention, through chemical composition design and process optimization, obtains a non-oriented silicon steel sheet with both low iron loss and high magnetic induction using a simple production process and low production cost.
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Citation Information

Patent Citations

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