Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1992-11-10
1994-12-06
Dean, Richard O.
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148112, 148113, C21D 812
Patent
active
053707486
ABSTRACT:
The present invention is a process for manufacturing a double oriented electrical steel sheet having a high magnetic flux density by carrying out a low temperature annealing for the secondary recrystallization by the use of AlN as inhibitor, characterized by hot-rolling a silicon steel slab comprising 1.8-4.8% by weight of Si, 0.008-0.048% by weight of acid soluble Al, 0.0028-0.0100% by weight of acid soluble Al, 0.0028-0.0100% by weight of total N, not more than 0.016% by weight of S and the balance being Fe and unavoidable impurities into a hot-rolled sheet, subjecting the sheet to cold-rolling at a reduction rate of 40-80%, subsequently subjecting the sheet to another cold-rolling at a reduction rate of 30-70% in the direction crossing the cold-rolled direction, annealing at 750.degree.-950.degree. C. in a wet hydrogen atmosphere for decarburization, and carrying out the final finishing annealing which comprises a stage for completing the secondary recrystallizing at a temperature of 920.degree.-1100.degree. C., followed by a stage for purification.
REFERENCES:
patent: 3640780 (1972-02-01), Stanley
patent: 4997493 (1991-03-01), Ushigami et al.
Suga Yozo
Ushigami Yoshiyuki
Dean Richard O.
Ip Sikyin
Nippon Steel Corporation
LandOfFree
Process for manufacturing double oriented electrical steel sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for manufacturing double oriented electrical steel sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for manufacturing double oriented electrical steel sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-211978