Ultra-high magnetic flux density grain-oriented electrical...

Metal treatment – Stock – Magnetic

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C148S307000, C148S111000

Reexamination Certificate

active

07399369

ABSTRACT:
The present invention is a grain-oriented electrical steel sheet characterized in that Bi is present at 0.01 to less than 1,000 ppm in terms of mass at the interface of the substrate steel and the primary film of the grain-oriented electrical steel sheet. The grain-oriented electrical steel sheet is produced by any of the processes of: before decarburization annealing, applying preliminary annealing for 1 to 20 sec. at 700° C. or higher and controlling an atmosphere in the temperature range; controlling the maximum attaining temperature B (° C.) before final cold rolling so that the maximum attaining temperature B may satisfy the expression, −10×ln(A)+1,100≦B≦10×ln(A)+1,220, in accordance with a Bi content A (ppm) and at the same time heating the steel sheet cold rolled to the final thickness to 700° C. or higher within 10 sec. or at a heating rate of 100° C./sec. or more before decarburization annealing, or immediately thereafter applying preliminary annealing for 1 to 20 sec. at 700° C. or higher; or controlling a TiO2amount B added in relation to MgO of 100 as parts by weight and an MgO coating amount C (g/m2) so that the expression, A0.8≦B×C≦400, may be satisfied in accordance with the Bi content A (ppm).

REFERENCES:
patent: 6280534 (2001-08-01), Senda et al.
patent: 2002/0011278 (2002-01-01), Komatsubara et al.
patent: 0588342 (1994-03-01), None
patent: 0957180 (1999-11-01), None
patent: 987343 (2000-03-01), None
patent: 1057898 (2000-12-01), None
patent: 8-188824 (1996-07-01), None
patent: 9-279247 (1997-10-01), None
patent: 10-130726 (1998-05-01), None
patent: 10-130727 (1998-05-01), None
patent: 2000-26942 (2000-01-01), None
patent: 2000-109931 (2000-04-01), None
patent: 2001-47194 (2001-02-01), None
patent: WO 98/46803 (1998-10-01), None
Machine Translation of Japanese Patent Document No. 08-188824 cited in the IDS submitted Jun. 24, 2004.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Ultra-high magnetic flux density grain-oriented electrical... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ultra-high magnetic flux density grain-oriented electrical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra-high magnetic flux density grain-oriented electrical... will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3966676

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.