Smith Tempel Blaha LLC
Laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and manufacturing method therefor
A laser-scribed grain-oriented silicon steel resistant to stress-relief annealing and a manufacturing method therefor. Parallel linear grooves (20) are formed on one or both sides of grain-oriented silicon steel (10) by laser etching. The linear grooves (20) are perpendicular to, or at an angle to, the rolling direction of the steel plate. A maximum height of edge protrusions of the linear grooves (20) does not exceed 5 μm, and a maximum height of spatters in etch-free regions between adjacent linear grooves (20) does not exceed 5 μm, and the proportion of an area occupied by spatters in the vicinity of the linear grooves (20) does not exceed 5%. The steel has low manufacturing costs, and the etching effect of the finished steel is retained during a stress-relief annealing process. The steel is suitable for manufacturing of wound iron core transformers.
BAOSHAN IRON & STEEL CO., LTD.
C C C B H C C C C
C21D C21D C21D B23K H01F C21D C25F C21D C21D
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Chen Jianguo Meihong Yaming Yongjie Weiyong Changsong Guobao Zipeng
Ling Guo Wu Ji Yang Xie Ma Li Zhao