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| Number | Title | Issue Date |
| 7976647 | Very high mechanical strength steel and method for making a sheet thereof coated with zinc or zinc alloy The invention concerns a very high mechanical strength steel, whereof the chemical composition comprises in wt. %: 0.006%=C=0250%; 0.400%=Mn=0.950%; Si=0.300%; Cr=0.300%; 0.100%=Mo=0.500%; 0.020%=AI=0.100%; P=0.100%; B=0.010%; Ti=0.050%, the rest being iron and impu... | 07/12/2011 |
| 7736449 | High-strength hot-dip galvanized steel sheet and method for producing the same The present invention stably provides a high-strength hot-dip galvanized steel sheet having a high tensile strength and no non-plated portions and being excellent in workability and surface properties even when the employed equipment has only a reduction annealing f... | 06/15/2010 |
| 7442268 | Method of manufacturing cold rolled dual-phase steel sheet A steel sheet having (a) a dual phase microstructure with a martensite phase and a ferrite phase and (b) a composition containing by percent weight: 0.01% to 0.2% C; 0.3% to 3% Mn; 0.05% to 2% Si; 0.1% to 2% Cr; 0.01% to 0.10 Al; and 0.0005% to 0.01% Ca, with the ba... | 10/28/2008 |
| 7311789 | Dual phase steel strip suitable for galvanizing Dual phase steel sheet is made using a time/temperature cycle including a soak at about AC1+45° F. to AC1+135° F. and a hold at 850-940F, where the steel has the composition in weight percent, carbon: 0.02-0.20; aluminum: 0.010-0.150; titaniu... | 12/25/2007 |
| 7267890 | High-strength hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having fatigue resistance corrosion resistance ductility and plating adhesion after servere deformation and a method of producing the same The present invention provides: a high-strength high-ductility hot-dip galvanized steel sheet and hot-dip galvannealed steel sheet having high fatigue resistance and corrosion resistance; a high-strength hot-dip galvanized steel sheet excellent in ductility, which i... | 09/11/2007 |
| 7241350 | Corrosion resistant poly-metal diffusion coatings and a method of applying same Diffusion metallic anticorrosive zinc-iron-aluminum coatings of iron and iron-based item surfaces, realized by heating of products at temperatures of 370–450° C. in a saturating powder mixture environment in a closed container. The coating compositions are multip... | 07/10/2007 |
| 7220316 | Wire material plating equipment An apparatus for plating a wire material is provided in which a range of the plated layer where the temperature is high and flowability is large, thus, easily generating thickness deviation, and a range of the plated layer where the temperature is low and the flowab... | 05/22/2007 |
| 7192656 | Zinc galvanizing method for a single surface of a metal tube A zinc galvanizing method for a single surface of a metal tube includes a first step of preparing metal tubes, a second step of galvanizing the metal tubes, a third step of acid washing, a fourth step of washing the metal tubes with water, and a final fifth step of ... | 03/20/2007 |
| 7122221 | Method and apparatus for metal vapor coating A method and apparatus for coating a substrate (4) with a metal coating by vaporizing the metal in an enclosure (1) containing a selected gas and the substrate. The vaporized metal is deposited on the surface of the substrate either in a solid or molte... | 10/17/2006 |
| 7118809 | High-strength hot-dip galvanized steel sheet with excellent spot weldability and stability of material properties A high-strength hot-dip galvanized steel sheet is provided which comprises a composite structure consisting essentially of ferrite and martensite. The steel comprises, by mass %, C: 0.05 to 0.12%, Si: not more than 0.05%, Mn: 2.7 to 3.5%, Cr: 0.2 to 0.5%, Mo: 0.2 to... | 10/10/2006 |
| 7090731 | High strength steel sheet having excellent formability and method for production thereof A high strength steel sheet having (2-1) a base phase structure, the base phase structure being tempered martensite or tempered bainite and accounting for 50% or more in terms of a space factor relative to the whole structure, or the base phase structure comprising ... | 08/15/2006 |
| 7077920 | Method of making coated steel part with regions of different ductility A workpiece having regions of different ductility is made by first coating opposite faces of a flat sheet-metal workpiece of low ductility and then stripping the coating from the faces in one region of the workpiece while leaving the coating on the faces in another ... | 07/18/2006 |
| 7078111 | Brazing sheet product and method of its manufacture Disclosed is a brazing sheet product including a core metal sheet (1), on at least one side of the core metal sheet (1) a clad layer (2) made of an aluminium brazing alloy comprising silicon in an amount in the range of 4 to 14% by weight, and o... | 07/18/2006 |
| 7074497 | Coated steel sheet and method for manufacturing the same A coated steel sheet having a coated layer on surfaces of a steel sheet of a composition containing not less than 0.1 mass % and under 3 mass % of Al, wherein a following condition A or B is met: A: An AlN precipitate layer exists on a matr... | 07/11/2006 |
| 7041181 | Coated steel part with regions of different ductility A hardenable steel workpiece having two regions is first hardened so that both regions are of generally the same low ductility. Then only one of the regions is hot coated so as to increase the ductility of the one region while not heating and changing the ductility ... | 05/09/2006 |
| 6982012 | Method of manufacturing steel sheet having excellent workability and shape accuracy A method of manufacturing a high strength steel sheet containing, in mass %, C: 0.02 to 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. The method includes performing hot rough rollin... | 01/03/2006 |
| 6939586 | Method and installation for hot process and continuous dip coating of a metal strip A process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part (13a | 09/06/2005 |
| 6936307 | Method and installation for dip coating of a metal strip A process for the continuous dip-coating of a metal strip (1) in a tank (11) containing a liquid metal bath (12), in which process the metal strip (1) is made to run continuously through a duct (13), the lower part (13a | 08/30/2005 |
| 6911268 | High strength hot-dip galvanized or galvannealed steel sheet having improved plating adhesion and press formability and process for producing the same Disclosed are a high strength hot-dip galvanized or galvannealed steel sheet, which has improved press formability and plating adhesion and is useful as a member for automobile, building, electric or other members, and a process for producing the same. This h... | 06/28/2005 |
| 6902829 | Coated steel alloy product A high strength dual phase cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a hot-dip zinc coating process to manufacture a high strength dual phase cold rolled steel having a conventional galvanized ... | 06/07/2005 |
| 6887590 | Galvannealed metal sheet and method for manufacture of such metal sheet The present invention relates to a method for the manufacture of galvannealed metal sheet, wherein a hot strip is produced from an IF steel containing 0.01 to 0.1 wt. % silicon, wherein the hot strip is coiled at a coiler temperature no lower than 700° C. and no hi... | 05/03/2005 |
| 6869691 | High strength hot-dip galvanized steel sheet and method for manufacturing the same The invention relates to a high strength hot-dip galvanized steel sheet consisting essentially of 0.03 to 0.25% C, 0.7% or less Si, 1.4 to 3.5% Mn, 0.05% or less P, 0.01% or less S, 0.05 to 1% Cr, 0.005 to 0.1% Nb, by mass, and balance of Fe, and being made of a com... | 03/22/2005 |
| 6869690 | Zinc-diffused alloy coating for corrosion/heat protection The present invention relates to a zinc-diffused nickel alloy coating for corrosion and heat protection and to a method for forming such a coating. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer on a substrate,... | 03/22/2005 |
| 6821361 | Quantitative measuring method and apparatus of metal phase using x-ray diffraction method, and method for making plated steel sheet using them A method and apparatus for quantitatively measuring a metal phase contained in a galvanized layer by X-ray diffractometry, and a method of producing a galvanized steel sheet by using the method and apparatus. The diffracted X-ray intensity from a metal phase contain... | 11/23/2004 |
| 6814819 | Methods of manufacturing hot-dip galvanized hot-rolled and cold-rolled steel sheets excellent in strain age hardening property The present invention provides a steel sheet having a chemical composition comprising 0.15% or less C, 2.0% or less Si, 3.0% or less Mn, P, S, Al and N in adjusted amounts, from 0.5 to 3.0% Cu, or one or more of Cr, Mo and W in a total amount of 2.0% or less, and ha... | 11/09/2004 |
| 6811624 | Method for production of dual phase sheet steel Dual phase steel sheet is made using a time/temperature cycle including a soak at about 1340-1425F and a hold at 850-920F, where the steel has the composition in weight percent, carbon: 0.02-0.20; aluminum: 0.010-0.150; titanium: 0.01 max; silicon: 0.5 max; phosphor... | 11/02/2004 |
| 6767652 | Galvannealed steel sheet superior in workability A galvannealed steel sheet superior in workability wherein the steel sheet is characterized by containing silicon in an amount no less than 0.8 mass % and retained austenite in an amount no less than 3% (in terms of packing factor) and the alloy zinc plating is char... | 07/27/2004 |
| 6756134 | Zinc-diffused alloy coating for corrosion/heat protection The present invention relates to a zinc-diffused nickel alloy coating for corrosion and heat protection and to a method for forming such a coating. The coating method broadly comprises the steps of forming a plain nickel or nickel alloy coating layer on a substrate,... | 06/29/2004 |
| 6743307 | High resistance steel band or sheet and method for the production thereof The invention relates to a higher-strength steel strip or steel sheet comprising a predominantly ferritic-martensitic microstructure with a martensite content of between 4 and 20%, wherein the steel strip or steel sheet, apart from Fe and impurities due to smelting,... | 06/01/2004 |
| 6706419 | Cold-rolled steel sheet or hot-rolled steel sheet excellent in painting bake hardenability and anti aging property at room temperature, and method of producing the same To provide a steel sheet excellent in painting bake hardenability and anti aging property at room temperature: containing, in mass, 0.0001 to 0.20% of C, 2.0% or less of Si, 3.0% or less of Mn, 0.15% or less of P, 0.015% or less of S, and, in addition, 010% or less ... | 03/16/2004 |
| 6699590 | Hot-dip galvanized steel sheet An object of the present invention is to provide a hot-dip galvanized steel sheet which is excellent in adhesion with a hot-dip galvanized zinc layer, and has high tensile strength and good formability even when a steel sheet containing Si and Mn in relat... | 03/02/2004 |
| 6699592 | Galvannealed steel sheet and method for manufacturing the same The invention provides a galvannealed steel sheet which has an oxide layer having 10 nm or larger thickness on the plateau of the coating layer flattened by temper rolling. With the use of the galvannealed steel sheet, no powdering occurs during press-for... | 03/02/2004 |
| 6641931 | Method of production of cold-rolled metal coated steel products, and the products obtained, having a low yield ratio The present invention aims to produce a cold rolled metal coated multi-phase steel, characterized by a tensile strength of at least 500 MPa, a yield ratio (Re/Rm) lower than 0.65 in skinned conditions, lower than 0.60 in unskinned conditions, and with goo... | 11/04/2003 |
| 6635313 | Method for coating a steel alloy A method of coating dual phase high strength cold rolled steel having controlled amounts of carbon, manganese, and molybdenum is used as a starting material in a galvanizing/galvannealing process. Conditions in a multi-zone furnace of the galvanizing line... | 10/21/2003 |
| 6623691 | Ultra-low carbon steel composition, the process of production of an ULC BH steel product and the product The present invention describes an ultra-low carbon bake hardenable galvanized or galvannealed steel product, having a higher yield strength at the temperature of the molten zinc bath while maintaining a low yield strength and excellent bake hardening pro... | 09/23/2003 |
| 6613163 | Steel band with good forming properties and method for producing same The invention relates to a method for producing band-shaped steel for components which are produced by drawing and ironing. The invention also relates to a steel band which can be drawn or ironed and which has been produced by the inventive method. The ho... | 09/02/2003 |
| 6610422 | Coated steel sheet and method for manufacturing the same The method for manufacturing coated steel sheet has the steps of: immersing a steel sheet in a hot-dip coating bath to form an Al--Zn base coating layer containing 20 to 95 mass % Al on the steel sheet, forming a passivated layer on the coating layer; and... | 08/26/2003 |
| 6610423 | Plated steel product having high corrosion resistance and excellent formability and method for production thereof The object of the present invention relates to a plated steel material and a method of production the same, having enhanced corrosion resistance and workability required for outdoor and exposed uses such as structures, revetments, fishing nets, fences, et... | 08/26/2003 |
| 6586117 | Steel sheet having excellent workability and shape accuracy and a method for its manufacture A steel for forming a high strength steel sheet contains, in mass %, C: at most 0.04%, Si: at most 0.4%, Mn: 0.5-3.0%, P: at most 0.15%, S: at most 0.03%, Al: at most 0.50%, N: at most 0.01%, and Mo: 0.01-1.0%. Steel sheet formed from the steel is suitabl... | 07/01/2003 |
| 6579615 | Plated steel wire with corrosion resistance and excellent workability, and process for its manufacture This invention provides a plated steel wire with high corrosion resistance and excellent workability, wherein the average composition of the plating alloy in the plated steel wire comprises, in terms of weight percentage, Al: 4-20%, Mg: 0.8-5%, and if nec... | 06/17/2003 |
