Non-oriented electrical steel sheet and manufacturing method thereof
By optimizing the chemical composition and manufacturing process, non-oriented electrical steel sheets with excellent yield strength and tensile strength were prepared, solving the problem of deformation and fracture of thin-gauge steel sheets in miniaturized motors, and realizing the application of low-cost, high-performance electrical steel sheets.
CN117467904BActive Publication Date: 2026-06-16BAOSHAN IRON & STEEL CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BAOSHAN IRON & STEEL CO LTD
- Filing Date
- 2022-07-20
- Publication Date
- 2026-06-16
Smart Images
Figure CN117467904B_ABST
Abstract
The present application discloses a kind of non-oriented electrical steel sheet, it contains Fe and inevitable impurities, it also contains the following each chemical element with mass percentage as follows: C:0.001~0.004%, Si:2.0~3.8%, Mn:0.05~1.0%, Al≤1.5%, Ca:0.0003~0.01%, Cr:0.005~0.4%.In addition the present application also discloses a kind of manufacturing method of the above-mentioned non-oriented electrical steel sheet, it includes the following steps: (1) smelting and casting;(2) heating and rolling: when temperature rises to 1020 DEG C or more, control the heating rate to be 0.8~2.0 DEG C / min when continuous casting billet is heated in heating furnace;Control final rolling temperature ≥880 DEG C, and the residence time after final rolling, before laminar cooling is controlled to be 5~40s;(3) normalizing annealing;(4) pickling;(5) cold rolling;(6) continuous annealing;(7) insulating coating.
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