Metal treatment – Process of modifying or maintaining internal physical... – Magnetic materials
Reexamination Certificate
2007-06-28
2010-10-19
Sheehan, John P (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
Magnetic materials
C148S120000
Reexamination Certificate
active
07815749
ABSTRACT:
The present invention provides a method of manufacturing a semi-hard magnetic material comprising, sequentially: preparing a raw material consisting essentially of 10.0 to 25.0% of Ni, 2.0 to 6.0% of Mo and the balance being Fe and inevitable impurities, in mass %; heat-treating or hot-working the raw material so that it has not less than 90% of martensitic structure; cold-working the material at a reduction of area of not less than 50% so that it has an extended structure including not less than 95% of a martensitic structure; and heat-treating the material in a range of 400 to 570° C. so as to generate more than 0% but less than 30.0% of reverse-transformed austenitic structure. The semi-hard magnetic material manufactured using this method can possess a coercive force of 1000 to 5600 A/m.
REFERENCES:
patent: 4536229 (1985-08-01), Jin et al.
patent: 5431746 (1995-07-01), Manning et al.
patent: 5527399 (1996-06-01), Manning et al.
patent: 5685921 (1997-11-01), Dulmaine
patent: 60-116109 (1985-06-01), None
patent: 2000-504069 (2000-04-01), None
patent: WO 97/28286 (1997-08-01), None
Hitachi Metals Ltd.
Sheehan John P
Sughrue & Mion, PLLC
LandOfFree
Method for manufacturing semi-hard magnetic material and... 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 for manufacturing semi-hard magnetic material and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing semi-hard magnetic material and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4242098