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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Hayakawa; Yasuyuki
Address:
Okayama, JP
No. of patents:
10
Patents:












Patent Number Title Of Patent Date Issued
RE39482 Method of making grain-oriented magnetic steel sheet having low iron loss February 6, 2007
Grain-oriented magnetic steel sheet made by the method-including hot rolling and final finish annealing, wherein (1) the O content in the steel slab is limited to up to about 30 ppm; (2) for the entire steel sheet having final thickness including an oxide film before final finish a
7371291 Grain-oriented magnetic steel sheet having no undercoat film comprising forsterite as primary co May 13, 2008
A grain oriented electromagnetic steel sheet is free from an undercoating mainly composed of forsterite (Mg.sub.2SiO.sub.4), excellent in processability and magnetic properties and useful to production cost, and has a composition containing, by % by mass, 2.0 to 8.0% of Si, wherein s
6562473 Electrical steel sheet suitable for compact iron core and manufacturing method therefor May 13, 2003
Electrical steel sheets having superior magnetic properties, anti-noise properties, and workability, are ideal for use a compact iron core material in electric apparatuses, such as compact transformers, motors, and electric generators. A totally new electrical steel sheet and a manuf
6531001 Non-oriented magnetic steel sheet having low iron loss and high magnetic flux density and manufa March 11, 2003
Non-oriented magnetic steel sheets, which are mainly used as materials for iron cores for use in electric apparatuses, have a low iron loss and a high magnetic flux density at the same time. The non-oriented magnetic steel sheet comprises from about 1.5 to about 8.0 weight % Si, from abo
6436199 Non-oriented magnetic steel sheet having low iron loss and high magnetic flux density and manufa August 20, 2002
Non-oriented magnetic steel sheets, which are mainly used as materials for iron cores for use in electric apparatuses, have a low iron loss and a high magnetic flux density at the same time. The non-oriented magnetic steel sheet comprises from about 1.5 to about 8.0 weight % Si, from abo
6432227 Electromagnetic steel sheet and process for producing the same August 13, 2002
Electromagnetic steel sheet from a high-purity steel slab, composed essentially of Si 2.0 to 8.0 wt %, Mn 0.005 to 3.0 wt % and Al 0.0010 to 0.012 wt % with each of Se, S, N and O each not more than 30 ppm.
6423157 Method of making grain-oriented magnetic steel sheet having low iron loss July 23, 2002
Grain-oriented magnetic steel sheet made by the method comprising of hot rolling and final finish annealing, wherein (1) the O content in the steel slab is limited to up to about 30 wtppm; (2) for the entire steel sheet including an oxide film before final finish annealing, from among
6322635 Electromagnetic steel sheet and process for producing the same November 27, 2001
Electromagnetic steel sheet from a high-purity steel slab, composed essentially of Si 2.0 to 8.0 wt %, Mn 0.005 to 3.0 wt % and Al 0.0010 to 0.012 wt % with each of Se, S, N and O each not more than 30 ppm.
6309473 Method of making grain-oriented magnetic steel sheet having low iron loss October 30, 2001
Grain-oriented magnetic steel sheet made by the method-including hot rolling and final finish annealing, wherein(1) the O content in the steel slab is limited to up to about 30 ppm;(2) for the entire steel sheet having final thickness including an oxide film before final finish annealing, fr
5666842 Method of cold rolling grain-oriented silicon steel sheet having excellent and uniform magnetic September 16, 1997
A method of manufacturing a grain-oriented silicon steel sheet having excellent and uniform magnetic characteristics by improving the magnetic flux density of a silicon coil cold rolled to a thin thickness without increasing a Si content. The method comprises controlling steel sheet










 
 
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