Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Patent
1997-10-09
1999-03-23
Sheehan, John
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
148111, H01F 118
Patent
active
058853715
ABSTRACT:
A method of producing a grain-oriented magnetic steel sheet exhibiting a very low core loss and high magnetic flux density uses a slab of silicon steel containing Al, B, N, and S and/or Se. The method employs hot rolling conducted such that the rolling reduction falls within the range of from about 85 to 99%, and the hot-rolling finish temperature falls within the range of from 950.degree. to 1150.degree. C. and is based on the contents of Si, Al and B. The hot-rolled steel sheet is rapidly cooled at a cooling rate of about 20.degree. C./s and is coiled at a temperature of about 670.degree. C. or lower. Hot-rolled sheet annealing or intermediate annealing is executed by heating the hot-rolled steel sheet up to about 800.degree. C. at a heating rate of from 5.degree. to 25.degree. C./s and holding at a temperature of from about 800.degree. to 1125.degree. C. for a period not longer than about 150 seconds. Final cold rolling is executed at a rolling reduction of from 80 to 95%, followed by final finish annealing conducted with specific control of annealing atmosphere.
REFERENCES:
patent: 3636579 (1972-01-01), Sakakura et al.
patent: 3933024 (1976-01-01), Matsumoto et al.
patent: 3990923 (1976-11-01), Takashina et al.
patent: 4000015 (1976-12-01), Malagari, Jr.
patent: 4319936 (1982-03-01), Dahlstrom et al.
patent: 5667598 (1997-09-01), Ozaki et al.
Goto Chizuko
Komatsubara Michiro
Kurosawa Mitsumasa
Muraki Mineo
Senda Kunihiro
Kawasaki Steel Corporation
Miller Austin R.
Sheehan John
LandOfFree
Method of producing grain-oriented magnetic 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 Method of producing grain-oriented magnetic steel sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of producing grain-oriented magnetic steel sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2121503