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| Number | Title | Issue Date |
| 6855213 | Non-ridging ferritic chromium alloyed steel A ferritic non-ridging stainless steel and process therefor. A chromium alloyed steel melt containing sufficient titanium and nitrogen but a controlled amount of aluminum is cast into an ingot or continuously cast into a strip or a slab having an as-cast fine equiax... | 02/15/2005 |
| 6474402 | Segmented roll for casting metal strip Casting molten metal using a segmented roll for casting continuous metal strip. A strip caster (10) for producing a continuous strip (18) includes a tundish for containing a melt and a pair of horizontally disposed water cooled composite casting rolls (84... | 11/05/2002 |
| 6088895 | Method for descaling hot rolled strip This invention relates to a process for producing a cold rolled, recrystallation annealed, stainless steel strip having lustrous surfaces without being hot band annealed and/or pickled prior to cold reduction. The process includes the sequential steps of ... | 07/18/2000 |
| 6074600 | Modification of tundish dam to minimize turbulence This invention relates to modifying the inside bottom surface of a tundish for continuous casting molten steel to minimize turbulence thereby reducing gas bubble and slag entrainment during continuous casting of steel, especially when initially filling of... | 06/13/2000 |
| 5955201 | Inorganic/organic insulating coating for nonoriented electrical steel The present invention relates to a nonoriented electrical steel sheet coated on both surfaces with a cured insulative coating for providing a high level of surface resistivity to minimize interlaminar power losses. The cured insulative coating on the stee... | 09/21/1999 |
| 5783622 | Precoated chromium alloyed steel with enhanced paint adhesion for exhaust applications A stainless steel sheet suitable for use in the manufacture of an exhaust component. The steel sheet has at least one surface pretreated with a protective coating resistant to delamination at temperatures up to about 540° C. including an inner inorganic ... | 07/21/1998 |
| 5779819 | Grain oriented electrical steel having high volume resistivity The present invention relates to the production of a grain oriented electrical steel composition having a volume resistivity of at least 50 micro-ohm-cm. The melt composition of the steel consists essentially of, in weight %, about 0.08% max carbon, about... | 07/14/1998 |
| 5749939 | Melting of NI laterite in making NI alloyed iron or steel A multiple stage process for obtaining Ni units from Ni laterite ores and sulfur-bearing Ni concentrates during production of nickel-alloyed iron, nickel-alloyed steel or nickel-alloyed stainless steel in a reactor equipped with top- and bottom-blowing me... | 05/12/1998 |
| 5743968 | Hydrogen peroxide pickling of stainless steel A process for removing scale from stainless steel using an aqueous solution containing hydrogen peroxide and an inorganic acid, i.e., hydrochloric or sulfuric acid. A hot rolled or annealed stainless steel strip (10) covered with scale is immersed into ho... | 04/28/1998 |
| 5736709 | Descaling metal with a laser having a very short pulse width and high average power The invention relates to an apparatus for using laser radiation to remove an oxide layer (scale) by vaporization from a hot rolled or annealed steel strip (40) traveling in a gravitationally vertical direction at a speed of at least 10 m/min. The apparatu... | 04/07/1998 |
| 5702534 | Hydrogen peroxide pickling of stainless steel A process for removing scale from stainless steel using an aqueous solution containing hydrogen peroxide. A hot rolled or annealed stainless steel strip (10) covered with scale is immersed into hot sulfuric acid contained within tanks (12) and (14). There... | 12/30/1997 |
| 5702539 | Method for producing silicon-chromium grain orieted electrical steel The present invention provides a method of producing grain oriented electrical steel having excellent mechanical and magnetic properties. A hot processed strip having a thickness of 1.5-4.0 mm thickness a composition consisting essentially of 2.5-4.5% sil... | 12/30/1997 |
| 5702502 | Method for direct use of chromite ore in the production of stainless steel A three-stage process for obtaining metallic Cr units insitu during the production of stainless steel. Raw chromite ore or a concentrate produced from chromite ore is mixed with a carbonaceous reductant and slagging agents are added to an iron bath (24) f... | 12/30/1997 |
| 5688010 | Coil edge protection from lifting device A coil lifter (26) adapted for being suspended from an overhead crane for lifting a coil (10) of strip material having a central opening (14). The lifter includes a vertical lifting arm (28), an upper portion (34), a lower portion (36), a lifting surface ... | 11/18/1997 |
| 5651412 | Strip casting with fluxing agent applied to casting roll A strip caster (10) for producing a continuous strip (24) includes a tundish (12) for containing a melt (14), a pair of horizontally disposed water cooled casting rolls (22) and devices (29) for electrostatically coating the outer peripheral chill surface... | 07/29/1997 |
| 5651413 | In-situ conditioning of a strip casting roll A strip caster (10) for producing a continuous strip (24) has a tundish (12) for containing a melt (14) and a pair of horizontally disposed water cooled casting rolls (22). The casting rolls are juxtaposed relative to one another for forming a pouring bas... | 07/29/1997 |
| 5643370 | Grain oriented electrical steel having high volume resistivity and method for producing same The present invention relates to the production of a grain oriented electrical steel composition having a volume resistivity of at least 50 micro-ohm-cm. The melt composition of the steel consists essentially of, in weight %, about 0.08% max carbon, about... | 07/01/1997 |
| 5591531 | Aluminized steel alloys containing chromium Steel alloys containing chromium may be hot dip aluminized in a bath having up to 15% silicon with improved wettability by using a bright preannealing practice in a box furnace having a substantially pure hydrogen atmosphere. The surfaces of the preanneal... | 01/07/1997 |
| 5575829 | Direct use of sulfur-bearing nickel concentrate in making Ni alloyed stainless steel A process for obtaining Ni units from sulfur-bearing nickel concentrate during refining a nickel-alloyed steel or a stainless steel. Sulfur of the concentrate is transferred to and held within the slag by controlling slag composition and temperature, degr... | 11/19/1996 |
| 5567224 | Method of reducing metal oxide in a rotary hearth furnace heated by an oxidizing flame Method of reducing metal oxide in a rotary hearth furnace (14) to make a feed stock for a refining vessel when manufacturing alloyed iron, alloyed steel or stainless steel. The rotary hearth furnace includes an annular inner refractory wall (32), an annul... | 10/22/1996 |
| 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 |
| 5539031 | Metal substrate with enhanced corrosion resistance and improved paint adhesion This invention is a blended powder mixture including a thermosetting resin and a solid, non-hydrolyzed, functional low molecular weight organosilane coupling agent. The powder mixture may be used to form a composite coating to protect a steel substrate fr... | 07/23/1996 |
| 5498481 | Metal substrate with enhanced corrosion resistance and improved paint adhesion This invention is a blended powder mixture including a thermosetting resin and a solid, non-hydrolyzed, functional low molecular weight organosilane coupling agent. The powder mixture may be used to form a composite coating to protect a steel substrate fr... | 03/12/1996 |
| 5478655 | Metal pretreated with an inorganic/organic composite coating with enhanced paint adhesion Painted metal sheet pretreated with a composite coating including an insoluble, inorganic inner layer and an organic outer layer. The inorganic layer is formed by rinsing the sheet with an alkaline solution containing at least 0.005M of at least one of a ... | 12/26/1995 |
| 5455080 | Metal substrate with enhanced corrosion resistance and improved paint adhesion This invention is a blended powder mixture including a thermosetting resin and a solid, non-hydrolyzed, functional low molecular weight organosilane coupling agent. The powder mixture may be used to form a composite coating to protect a steel substrate fr... | 10/03/1995 |
| 5447754 | Aluminized steel alloys containing chromium and method for producing same Steel alloys containing chromium may be hot dip aluminized in a bath having up to 15% silicon with improved wettability by using a bright preannealing practice in a box furnace having a substantially pure hydrogen atmosphere. The surfaces of the preanneal... | 09/05/1995 |
| 5433976 | Metal pretreated with an aqueous solution containing a dissolved inorganic silicate or aluminate, an organofuctional silane and a non-functional silane for enhanced corrosion resistance Painted metal sheet pretreated with an insoluble, composite layer containing siloxane. The composite layer is formed by rinsing the sheet with an alkaline solution containing at least 0.005M of a dissolved silicate or a dissolved aluminate, at least 0.1 v... | 07/18/1995 |
| 5421911 | Regular grain oriented electrical steel production process The present invention provides a steel composition and method for producing a high quality regular grain oriented electrical steel having less than 0.005% aluminum using a single cold reduction step. A high austenite volume fraction, the use of an anneali... | 06/06/1995 |
| 5328529 | High strength austenitic stainless steel having excellent galling resistance A nonmagnetic austenitic stainless steel and articles produced therefrom, such as drill collars, having a 0.2% yield strength of at least 690 N/mm2 (100 ksi), excellent resistance to intergranular stress corrosion, good ductility, good corrosio... | 07/12/1994 |
| 5326594 | Metal pretreated with an inorganic/organic composite coating with enhanced paint adhesion Painted metal sheet pretreated with a composite coating including an insoluble, inorganic inner layer and an organic outer layer. The inorganic layer is formed by rinsing the sheet with an alkaline solution containing at least 0.005M of at least one of a ... | 07/05/1994 |
| 5322713 | Metal sheet with enhanced corrosion resistance having a silane treated aluminate coating Metal sheet protected against corrosion by a silane treated inorganic aluminate coating. A thin aluminate coating was formed by immersing a galvanized steel sheet into an alkaline solution containing 0.005M dissolved aluminate for about 30 seconds. The sh... | 06/21/1994 |
| 5292549 | Metallic coated steel having a siloxane film providing temporary corrosion protection and method therefor A metallic coated steel such as a galvanized sheet is coated with a thin siloxane film having a preferred thickness of about 45 Å for providing temporary corrosion protection. The siloxane film is formed by rinsing the metallic coated sheet with an aqueo... | 03/08/1994 |
| 5288736 | Method for producing regular grain oriented electrical steel using a single stage cold reduction The present invention produces a regular grain oriented electrical steel using a single cold reduction step having excellent and highly uniform magnetic quality. The method includes the steps of providing an electrical steel band having Mn of 0.024% or le... | 02/22/1994 |
| 5234490 | Operating a blast furnace using dried top gas Method of producing pig iron in a blast furnace. At least a portion of a top gas from a blast furnace is collected, dried and then heated to an elevated temperature preferably in the range of 900°-1000° C. An oxygen-enriched hydrogenaceous fuel is intro... | 08/10/1993 |
| 5192373 | Magnesium oxide coating for electrical steels and the method of coating Decarburized grain oriented silicon steel is provided with an annealing separator which forms a glass film after the final high temperature anneal. The magnesia used as the annealing separator has a total chlorine level of 0.01 to 0.20% by weight based on... | 03/09/1993 |
| 5182883 | Telephone enclosure A telephone enclosure including curved sidewalls each having an outer panel, an inner panel, an acoustic panel and a body rail assembly. The body rail assembly comprises a plurality of rails, each of which have depending legs to receive the inner panel, o... | 02/02/1993 |
| 5176755 | Plastic powder coated metal strip Process and apparatus for forming a plastic coating on a metal strip. A metal strip is cleaned, surface treated, coated with an electrostatically charged plastic powder in an enclosed chamber using a plurality of spray guns positioned on both sides of the... | 01/05/1993 |
| 5137611 | Electrolytic plating one surface of conductive sheet Apparatus for horizontally plating one surface of conductive sheet with a metal or metal alloy. The apparatus includes an electrolyte holding tank, a horizontally disposed enclosed electrolyte conduit having extended inlet and outlet portions, a variable ... | 08/11/1992 |
| 5127736 | Apparatus for measuring wear in the lining of refractory furnaces A continuous wave laser light beam is directed at the refractory lining within a furnace vessel, and the displacement as measured by a self-scanned linear array of the scattered light beam from a nominal or reference position measured to provide an indica... | 07/07/1992 |
| 5125745 | Automatic BOF vessel remaining lining profiler and method Portable inspection apparatus for determining the actual remaining thickness of the lining of a BOF vessel. The apparatus is mounted on a portable cart which can be wheeled into close proximity with the open top of a horizontally disposed furnace vessel. ... | 06/30/1992 |
