Non-oriented electrical steel sheet and manufacturing method therefor
The controlled grain orientation and rapid temperature increase during annealing in non-oriented electrical steel sheets address the challenges of high resistivity alloy elements, achieving uniform magnetism and reduced iron loss for improved motor performance.
Patent Information
- Authority / Receiving Office
- US · United States
- Patent Type
- Applications(United States)
- Current Assignee / Owner
- POHANG IRON & STEEL CO LTD
- Filing Date
- 2023-10-11
- Publication Date
- 2026-06-18
AI Technical Summary
Existing methods for manufacturing non-oriented electrical steel sheets face challenges in achieving high magnetic flux density and uniform magnetism in all directions due to the addition of high resistivity alloy elements like Si, Al, and Mn, leading to increased rolling loads and surface defects, while existing annealing and rolling processes degrade motor performance.
A non-oriented electrical steel sheet composition with controlled grain orientations and rapid temperature increase during annealing between pre-rolling and cold rolling, including specific alloy content and controlled annealing processes to form grains with specific orientations, enhancing magnetic flux density and reducing iron loss.
The solution results in a steel sheet with excellent magnetic flux density and reduced iron loss in all directions, suitable for environmentally-friendly vehicle motors and high-efficiency home appliance motors, by controlling grain orientations and rapid temperature increases during annealing.
Smart Images
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