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Inventor:
Yoshitomi; Yasunari
Address:
Kitakyushu, JP
No. of patents:
15
Patents:












Patent Number Title Of Patent Date Issued
6858095 Thick grain-oriented electrical steel sheet exhibiting excellent magnetic properties February 22, 2005
A grain-oriented electrical steel sheet comprising 2.5-4.5% Si by weight and measuring 0.36-1.00 mm in thickness is imparted with a good core loss value for its thickness by controlling its C content, flux density, grain boundary configuration, and deviation degree of crystal orientation
5597424 Process for producing grain oriented electrical steel sheet having excellent magnetic properties January 28, 1997
The present invention relates to the provision of a process for producing a grain oriented electrical steel sheet having excellent magnetic properties, and comprises heating a slab comprising by weight 0.021 to 0.075% of C, 2.5 to 4.5% of Si, 0.010 to 0.060% of acid sol. Al, 0.0030 to
5545263 Process for production of grain oriented electrical steel sheet having superior magnetic propert August 13, 1996
In the present invention, a slab of a silicon steel comprising usual components is hot-rolled while adjusting the hot rolling-finish temperature at 750.degree. to 1150.degree. C. and the cumulative reduction ratio of final three passes to at least 40%, or the above-mentioned silicon
5512110 Process for production of grain oriented electrical steel sheet having excellent magnetic proper April 30, 1996
In the present invention, grain oriented electrical steel sheets provided by heating a slab comprising, by weight percent, 0.025 to 0.075% of C, 3.4 to 5.0% of Si, 0.015 to 0.080% of sol. Al, 0.0030 to 0.013% of N, 0.014% or less of (S+0.405 Se) and 0.05 to 0.8% of Mn, sol. Al (%)/Si (%)
5472521 Production method of grain oriented electrical steel sheet having excellent magnetic characteris December 5, 1995
This invention is directed to improve magnetic properties and to stabilize the magnetic properties of a grain oriented electrical steel sheet used as a core of electric appliances. When producing a grain oriented electrical steel sheet by heating a slab containing C, Si, acid-soluble Al,
5346559 Process for manufacturing double oriented electrical steel sheet having high magnetic flux densi September 13, 1994
The present invention provides a process for manufacturing a double oriented electrical steel sheet having a high flux density by suppressing the growth of the secondary recrystallization of {110} <uvw> oriented grains from the surface of the steel sheet in the hot-rolling stage or
5261972 Process for producing grain-oriented electrical steel strip having high magnetic flux density November 16, 1993
The present invention discloses a process for producing a grain-oriented electrical steel strip having a high magnetic flux density. The process comprises hot-rolling a steel ingot comprising basic ingredients and, added thereto, 0.02 to 0.15% of Sn at a temperature of 1200.degree. C. or
5261971 Process for preparation of grain-oriented electrical steel sheet having superior magnetic proper November 16, 1993
A silicon steel slab comprising 0.05 to 0.8% by weight of Mn and up to 0.014% by weight of S+0.405Se is heated at a temperature lower than 1280.degree. C. and hot-rolled under such conditions that the hot rolling-finish temperature is 700.degree. to 1150.degree. C., the cumulative re
5145533 Process for producing grain-oriented electrical steel sheet having excellent magnetic characteri September 8, 1992
A process for producing a grain-oriented electrical steel sheet having an excellent magnetic characteristic, comprising the steps of: heating to a temperature lower than 1280.degree. C. a steel slab comprising 0.025 to 0.075 wt % C, 2.5 to 4.5 wt % Si, 0.010 to 0.060 wt % acid-soluble Al
5039359 Procees for producing grain-oriented electrical steel sheet having superior magnetic characteris August 13, 1991
A process for producing a grain-oriented electrical steel sheet having a superior magnetic characteristic, comprising the steps of: hot-rolling a silicon steel slab comprising 0.021 to 0.100 wt % C, 2.5 to 4.5 wt % Si, one or more elements for forming inhibitors, and the balance consisti
4990779 Method and apparatus for evaluating strains in crystals February 5, 1991
The strains in crystals are evaluated by quantifying the sharpness of an electron channeling pattern and determining changes in the quantified sharpness of the electron channeling pattern. There is such a close correlation between the sharpness of the electron channeling pattern and
4888066 Method for producing grain-oriented electrical steel sheet with very high magnetic flux density December 19, 1989
A method of producing grain-oriented electrical steel sheet with a very high magnetic flux density, is characterized by increasing the partial pressure of the N.sub.2 in the annealing atmosphere at the intermediate stage between the start and the finish of the secondary recrystallization
4824493 Process for producing a grain-oriented electrical steel sheet having improved magnetic propertie April 25, 1989
In the production of a grain-oriented electrical steel sheet by utilizing an AIN main inhibitor and at least twice cold-rolling with a heavy final reduction, improved magnetic properties are stably obtained by controlling the cooling speed (R) in the cooling process of a hot-rolled sheet
4692193 Process for producing a grain-oriented electrical steel sheet having a low watt loss September 8, 1987
A thin-gauge (0.10-0.23 mm thick) grain-oriented electrical steel sheet is produced by a process characterized by a decarburization which is carried out after the hot-rolling and before the final cold-rolling, after which the known, decarburization annealing and finishing annealing are c
4595426 Grain-oriented silicon steel sheet and process for producing the same June 17, 1986
Extremely low watt-loss of W.sub.17/50 .ltoreq.0.88 w/kg is provided by the combination of extremely low carbon, silicon and nitrogen contents; a thin sheet thickness of 0.15 to 0.23 mm; a high magnetic flux density B.sub.10 .gtoreq.1.89 T; and copresence of coarse and fine (2 mm or less










 
 
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