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| Number | Title | Issue Date |
| 7442260 | Grain-oriented electrical steel sheet superior in electrical characteristics and method of production of same The present invention provides a grain-oriented electrical steel sheet with an extremely low core loss by scanning by a small focused laser beam spot and a method of production of the same, that is, a grain-oriented electrical steel sheet improved in electrical char... | 10/28/2008 |
| 7368166 | Polymerase chain reaction using metallic glass-coated microwire A metallic glass-coated microwire has controllable surface porosity. The porosity is achieved by etching the metallic glass-coated microwire or other shapes of glass-coated bodies with acid after annealing to produce a multi-phase glass coating. Porous metallic glas... | 05/06/2008 |
| 7364629 | Method for manufacturing grain-oriented silicon steel sheets with mirror-like surface In a method for manufacturing grain-oriented silicon steel with mirror-like surface by applying an aqueous slurry of an annealing separator, magnetic properties are stabilized by controlling the amount of moisture, carried in the annealing separator consisting mainl... | 04/29/2008 |
| 7282102 | Method for manufacturing high silicon grain-oriented electrical steel sheet with superior core loss property A method for manufacturing a high silicon grain-oriented electrical steel sheet. In a method for manufacturing a high silicon grain-oriented electrical steel sheet, comprising the steps of: reheating and hot-rolling a steel slab to produce a hot-rolled steel sheet; ... | 10/16/2007 |
| 7233249 | Multi-bit encoded glass-coated microwire and articles composed thereof A glass-coated amorphous metallic microwire is encoded with multi-bit digital information. Encoding is achieved magnetically, optically or through a combination of magnetic and optical encoding processes. Magnetic encoding is carried out by modifying the constituent... | 06/19/2007 |
| 7059384 | Apparatus and method for metal strip casting Disclosed is a method and apparatus for continuously casting a metal strip. A casting pool of molten metal is formed, and a metal strip is solidified onto a casting surface. The temperature of the casting surface is maintained above a predetermined critical value. B... | 06/13/2006 |
| 7011139 | Method of continuous casting non-oriented electrical steel strip Non-oriented electrical steels are widely used as the magnetic core material in a variety of electrical machinery and devices, particularly in motors where low core loss and high magnetic permeability in all directions of the strip are desired. A method for producin... | 03/14/2006 |
| 6666929 | Process for the improvement of the magnetic characteristics in grain oriented electrical silicon steel sheets by laser treatment It has been found out that in the laser treatment for the control of the magnetic domain sizes in grain oriented electrical silicon steel sheets, by optimizing some essential parameters of the treatment such as specific radiation energy, the distance amon... | 12/23/2003 |
| 6562473 | Electrical steel sheet suitable for compact iron core and manufacturing method therefor 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 elect... | 05/13/2003 |
| 6312531 | Magnetic composite article and manufacturing method of the same and soft magnetic powder of Fe-Al-Si system alloy used in the composite article Soft magnetic powder of Fe--Al--Si system of which magnetostrictive constant λ takes a positive value at the room temperature is employed to produce a magnetic composite article so that a temperature characteristic of core-loss of the article takes a neg... | 11/06/2001 |
| 6280862 | Ultra-low iron loss grain-oriented silicon steel sheet Ultra-low iron grain-oriented silicon steel sheet which is made by forming a ceramic tensile coating including at least inner and outer portions of a nitride and/or a carbide, the outer portion having a coefficient of thermal expansion that is lower than ... | 08/28/2001 |
| 6136456 | Grain oriented electrical steel sheet and method Grain oriented electrical steel sheet with a very low iron loss and a method for producing the same, wherein the surface of the iron substrate of the grain oriented electrical steel sheet is subjected to an enhancement treatment of crystal grain orientati... | 10/24/2000 |
| 5565272 | Grain oriented silicon steel sheet having excellent primary film properties A grain oriented silicon steel sheet having excellent primary glass film property and magnetic property, comprising 2.0 to 5.0% by weight of Si, wherein a primary glass film formed during secondary recrystallization annealing is composed mainly of forster... | 10/15/1996 |
| 5547519 | Magnesia coating and process for producing grain oriented electrical steel for punching quality The present invention provides an annealing separator composition for coating grain oriented electrical steel prior to the final high temperature anneal for secondary grain growth. The magnesia based coating contains at least 20% silica on a water free ba... | 08/20/1996 |
| 5417772 | Method for producing a magnetic steel strip by direct casting Method for producing a magnetic steel strip having a thickness of less than 5 mm and containing, in composition by weight, more than 2% silicon, less than 0.1% carbon and a suitable amount of secondary recrystallization inhibiting elements, the balance be... | 05/23/1995 |
| 5393321 | Method and apparatus for producing strip products by a spray forming technique A method of producing continuous lengths of metallic strip comprises the steps of forming a spray of molten metal particles, causing the particles to be deposited onto a surface of a hollow receptor roll, rotating and internally heating the receptor roll ... | 02/28/1995 |
| 5352490 | Method of chemical vapor deposition in a continuous treatment line A reaction gas or a gas containing a reaction gas is blown through blowing nozzles onto a steel material in a chemical vapor deposition treating chamber at a velocity sufficient to forcibly remove reacted products from reacted surfaces of a steel material... | 10/04/1994 |
| 5089061 | Method for producing high silicon steel strip in a continuously treating line The present invention relates to a method for producing high silicon steel strip in a continuous treatment line through chemical vapor deposition (called "CVD" hereinafter), wherein the steel strip is subjected continuously to siliconization at temperatur... | 02/18/1992 |
| 5089062 | Drilling of steel sheet A steel sheet (10) having a stress-relief annealed, structure with a plurality of magnetic domains (12) is made by drilling a plurality of closely spaced, small holes (15) through the entire thickness of the steel sheet, where the drilling is effective to... | 02/18/1992 |
| 5085411 | Apparatus for processing grain-oriented electrical steel strip An apparatus for processing grain-oriented electrical steel strip has a groove-scribing unit, which comprises a groove-scribing roll mounted above a pressing roll, disposed on the entry side of an insulation coating unit. A bridle roll is provided above t... | 02/04/1992 |
| 5080326 | Method and apparatus for refining the domain structure of electrical steels by local hot deformation and product thereof A method is provided for improving the electrical characteristics of grain-oriented silicon steel sheet by heating the steel to temperatures above 1000° F. and then deforming grooves to refine the magnetic domains, optionally, post heat treating to form ... | 01/14/1992 |
| 5062906 | Method of making non-oriented electrical steel sheets The present invention is to produce non-oriented electrical steel sheet by a hot direct rolling. The slab is directly sent to the hot rolling without the brief soaking, whereby others than AlN inevitably precipitated check the precipitation of AlN, a roug... | 11/05/1991 |
| 5045129 | Process for the production of semiprocessed non oriented grain electrical steel The present invention concerns a process for the production of semiprocessed non oriented grain electrical steel. More precisely it provides a solution to the technical problem of obtaining non oriented grain sheet or strip characterized by high magnetic ... | 09/03/1991 |
| 5026439 | Process for preparing wound core having low core loss The present invention provides a wound core having a low core loss and not susceptible to a disappearance of the core loss lowering effect due to a magnetic domain refining even when stress-relief annealing is conducted after fabrication of a steel strip ... | 06/25/1991 |
| 5013373 | Method for treating electrical steel by electroetching and electrical steel having permanent domain refinement Permanent domain refinement of grain oriented electrical steel strip is obtained in a high speed two-stage process. The process removes the glass in narrow regions which just expose the base metal. An electrolytic etch is then used to deepen the region in... | 05/07/1991 |
| 4968361 | Method of domain refinement of oriented silicon steel by using flux-printing A method is provided for domain refinement of final texture annealed grain-oriented silicon steel by removing portions of the base coating to substantially expose a line pattern of the underlying silicon steel by applying in the pattern an agent to the co... | 11/06/1990 |
| 4904312 | Method of electrolytically etching linear impressions in electrical steel This invention relates to a method of enhancing linear impressions formed in the surface of grain oriented electrical steel strip, by electrolytically etching said impressions with e.g. citric acid. The impressions may be formed by mechanical wheel scribi... | 02/27/1990 |
| 4832762 | Method for producing thin steel sheet of high magnetic permeability An ordinarily made thin steel sheet is placed in an atmosphere bearing SiCl4, and subjecting to Si penetrating treatment at temperatures between 1100° C. and 1200° C. for a determined period of time. A heating rate is used which is more than ... | 05/23/1989 |
| 4439252 | Method of producing grain-oriented silicon steel sheets having excellent magnetic properties A grain-oriented silicon steel sheet having excellent magnetic properties can be stably produced by adjusting properly the C content in a silicon steel to be used as a starting material depending upon the Si content in the steel, removing a proper amount ... | 03/27/1984 |
| 4437909 | Process for producing a grain-oriented silicon steel sheet or strip having excellent magnetic properties The present invention relates to a process for producing a grain-oriented silicon steel sheet or strip, wherein the crystals of the steel sheet or strip have an orientation of {110} and, further, the steel is easily magnetized in the rolling directio... | 03/20/1984 |
| 4371405 | Process for producing grain-oriented silicon steel strip In a process for producing a grain-oriented silicon steel strip, comprising the steps of: hot rolling, annealing, if necessary; heavy cold rolling; decarburization-annealing, and; final annealing, an improvement which comprises controlling a coiling tempe... | 02/01/1983 |
| 4311538 | Method of sealing an inner cover arranged in a box annealing furnace used for producing grain-oriented silicon steel sheets The use of coarse sand particles having an average size of 0.5-10 mm in the sealing of the lower end portion of an inner cover, which is arranged in a box annealing furnace, at the final annealing, in the production of grain-oriented silicon steel sheets,... | 01/19/1982 |
| 4108694 | Continuously cast slabs for producing grain-oriented electrical steel sheets having excellent magnetic properties A continuously cast steel slab for production of a grain-oriented electrical steel sheet having excellent magnetic properties in which at least 95% of the total number of grains constituting an equi-axed crystal zone in said slab has a cross sectional dim... | 08/22/1978 |
| 4050957 | Process for the passivation of ferrosilicon A process for the passivation of discrete particles of ferrosilicon containing 30-90% by weight silicon comprises contacting the particles with a gaseous oxidizing agent at a temperature between 800°-1150° C for a time ranging between 1-12 hours. The ... | 09/27/1977 |
| 4043805 | Isotropic and high-strength high silicon steel sheet A silicon-containing high strength steel sheet having isotropic high ductility and toughness in all directions independently of the rolling direction comprising 0.03 to 0.15% C, 0.7 to 2.3% Si, 0.7 to 2.0% Mn with the balance being iron and unavoidable im... | 08/23/1977 |
| 4006044 | Steel slab containing silicon for use in electrical sheet and strip manufactured by continuous casting and method for manufacturing thereof A steel slab containing silicon for use as an electrical steel sheet and strip and having no blister occurrence in the final product manufactured by continuous casting, characterized in that said slab comprises 2.5 - 4.0 wt.% of silicon, less than 0.04% o... | 02/01/1977 |
| 3986902 | Silicon steel suitable for production of oriented silicon steel using low slab reheat temperature A process for producing grain oriented silicon sheet steel having excellent magnetic properties in which the manganese and sulfur contents are critically controlled so that the product of manganese content, in weight percent, times sulfur content, in weig... | 10/19/1976 |
| 3960616 | Rare earth metal treated cold rolled, non-oriented silicon steel and method of making it A melt for cold rolled, non-oriented silicon steel is deoxidized and thereafter treated with mischmetal or a mischmetal alloy to desulfurize the melt to 0.012% by weight sulfur or less without the formation of a polluting smoke. The deoxidation is carried... | 06/01/1976 |
| 3935038 | Method for manufacturing non-oriented electrical steel sheet and strip having no ridging A method for manufacturing non-oriented electrical steel sheet and strip having no ridging characterized in that, non-oriented electrical steel sheet and strip is manufactured by casting molten silicon steel into a slab, hot-rolling, cold-rolling and anne... | 01/27/1976 |
