Resources Contact Us Home
Process for producing grain-oriented electrical steel sheet having high magnetic flux density

Image Number 8 for United States Patent #5186762.

A process for producing a grain-oriented electrical steel sheet having a high magnetic flux density, comprising the steps of: heating a steel slab comprising 1.8 to 4.8 wt % Si, 0.012 to 0.050 wt % acid-soluble A1, 0.010 wt % or less N, and the balance consisting of Fe and unavoidable impurities, to a temperature for hot rolling; hot-rolling the heated slab to form a hot-rolled strip; cold-rolling the hot-rolled strip to a final product sheet thickness at a final cold rolling reduction of 80% or more by a single step of cold rolling or by two or more steps of cold rolling with an intermediate annealing step inserted therebetween; primary-recrystallization-annealing the cold-rolled strip; final-annealing the primary-recrystallization-annealed strip so that secondary-recrystallized grains substantially completely grow up in a temperature region of from to C. and then purification is effected above C.; and subjecting the primary-recrystallization-annealed steel strip to a nitriding treatment before a secondary recrystallization occurs during the final annealing.

  Recently Added Patents
Performing parallel processing of distributed arrays
Electric power demand/supply planning apparatus and method for the same
Audio localization using multilateration
Connection method of replaceable sensors for resistivity arrays
Image processing apparatus and method for defining distortion function for synthesized image of intermediate view
Newborn infant formulas and feeding methods
Safety controller and safety control method
  Randomly Featured Patents
Apparatus for conveying piles of newspapers in perpendicular directions
Glow plug energization control apparatus and glow plug energization control method
Solubilization and reaction of coal and like carbonaceous feedstocks to hydrocarbons and apparatus therefor
Low-profile surface mount filter
Liquid crystal display device having protective circuits and method of manufacturing the same
Retractable lead for dogs
Mother's nursing aid: breast-feeding sling
Semiconductor device having plural memories which synchronously generate acess allow signals
Portable suction lysimeter
Droplet ejection head and droplet ejection apparatus