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Inventor:
Kurosawa; Mitsumasa
Address:
Okayama, JP
No. of patents:
16
Patents:












Patent Number Title Of Patent Date Issued
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
6602357 Grain oriented electrical steel sheet with low iron loss and production method for same August 5, 2003
A grain oriented electrical steel sheet comprises metal part containing Si: about 2.5 to about 5.0 mass % and Cr: about 0.05 to about 1.0 mass %, and an insulation coating formed on a surface of the metal part. A tension imparted to the metal part in the rolling direction by the insulati
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
6475304 Grain-oriented silicon steel sheet and process for production thereof November 5, 2002
Grain-oriented silicon steel sheet with Bi as an auxiliary inhibitor and a forsterite coating film having a Cr spinel oxide subscale of FeCr.sub.2 O.sub.4 or Fe.sub.x Mn.sub.1-x Cr.sub.2 O.sub.4 (0.6.ltoreq.x.ltoreq.1), made from a steel slab containing 0.005-0.20 wt % of Bi and 0.1-1.0
6444051 Method of manufacturing a grain-oriented electromagnetic steel sheet September 3, 2002
A method of making a grain-oriented electromagnetic steel sheet having a low iron loss and a high magnetic flux density, from a steel slab with 0.03 to 0.095 wt % carbon, about 1.5 to 7.0 wt % Si, about 0.03 to 2.50 wt % manganese, about 0.003 to 0.040 wt % sulfur and/or selenium, about
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
6406558 Method for manufacturing magnetic steel sheet having superior workability and magnetic propertie June 18, 2002
Manufacturing semiprocessed non-oriented magnetic steel sheets, which has superior workability in steps of assembling cores for motors or the like, in which improvement in productivity and higher accuracy of the products can be realized, by hot rolling a steel slab containing about 0.001
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
6287392 Grain-oriented silicon steel sheet and process for production thereof September 11, 2001
Grain-oriented silicon steel sheet with Bi as an auxiliary inhibitor and a forsterite coating film having a Cr spinel oxide subscale of FeCr.sub.2 O.sub.4 or Fe.sub.x Mn.sub.1-x Cr.sub.2 O.sub.4 (0.6.ltoreq.x.ltoreq.1), made from a steel slab containing 0.005-0.20 wt % of Bi and 0.1-1.0
6280534 Grain oriented electromagnetic steel sheet and manufacturing thereof August 28, 2001
Method of making a grain oriented electromagnetic steel sheet having excellent magnetic properties, by a series of steps ranging from hot rolling to final finishing annealing for a silicon steel slab containing from about 0.001 to 0.07 wt % bismuth, wherein the average cooling rate f
5885371 Method of producing grain-oriented magnetic steel sheet March 23, 1999
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
5620533 Method for making grain-oriented silicon steel sheet having excellent magnetic properties April 15, 1997
A method for producing a grain-oriented silicon steel sheet in the coil shape having high magnetic induction and including AlN and MnSe as principal inhibitors is disclosed. In a series of processes for producing a grain-oriented silicon steel sheet, the oxide content on the steel sheet










 
 
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