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| Number | Title | Issue Date |
| 7879164 | Method of producing hot-rolled steel sheet A steel sheet excellent in mechanical strength, workability and thermal stability and suited for use as a raw material in such fields of manufacturing automobiles, household electric appliances, machine structures, and of constructing buildings, and a manufacturing ... | 02/01/2011 |
| 7763131 | Method and apparatus for limiting the vibration of steel or aluminum strips in a blown-gas or -air cooling zones The invention relates to a method of improving the cooling of a blown-gas cooling chamber or of a blown-air cooling section in a line for heat treating steel and/or aluminum, and/or of improving the quality of products for treatment by reducing the vibration generat... | 07/27/2010 |
| 7718018 | Method of cooling steel plate A method of cooling both surfaces of steel plate, which stably secures precision of cooling control from a start of cooling to an end so as to uniformly cool the top and bottom surfaces of the steel plate and thereby stably secures the steel plate quality and cools ... | 05/18/2010 |
| 7591917 | Method of producing steel strip Steel strips and methods for producing strip are provided. The method for producing steel strips comprises continuously casting low carbon, silicon/manganese killed or aluminum killed molten steel into a strip, the molten steel comprising a concentration of residual... | 09/22/2009 |
| 7354493 | Method and device for patenting steel wires Disclosed is a method for patenting at least one steel wire, according to which the temperature is increased at least to a level at which the steel austenitizes, followed by quenching in a liquid medium by directing the wire through at least one curtain of cooling l... | 04/08/2008 |
| 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 |
| 7294215 | Method and device for cooling steel sheet The present invention relates to a method for cooling a steel plate comprising the steps of: forming a water pool with jets of cooling water being injected to impinge on one another by using one slit-nozzle and a plurality of induced laminar flow nozzles, the slit n... | 11/13/2007 |
| 7288158 | Manufacturing process for producing high strength steel product with improved formability A flat rolled, high strength, formable steel product has a yield strength of at least about 100 ksi. The product has sufficient formability such that it can withstand a longitudinal or transverse 180° bend of less than 1.0 times its thickness and is preferably comp... | 10/30/2007 |
| 7169244 | Process for manufacturing steel strip with low aluminum content for containers The present invention provides a process for manufacturing a steel strip with low aluminum content, which includes: hot-rolling a steel strip which includes between 0.050 and 0.080% by weight of carbon, between 0.25 and 0.40% by we... | 01/30/2007 |
| 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 |
| 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 |
| 6962631 | Steel plate excellent in shape freezing property and method for production thereof A ferritic steel sheet wherein a mean value of X-ray random intensity ratios of a group of {100} to {223} orientations is 3.0 or more and a mean value of X-ray random intensity ratios of three crystal orientations of {554}, {111}, and {111} ... | 11/08/2005 |
| 6913659 | Rapid cooling device for steel band in continuous annealing equipment The present invention provides a cooling apparatus having sufficient cooling ability in the cooling process of a continuous annealing facility and capable of minimizing the strip temperature difference in the width direction caused by the high speed blowing of the g... | 07/05/2005 |
| 6896034 | Method for controlling a continuous strip steel casting process based on customer-specified requirements A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to automatical... | 05/24/2005 |
| 6884388 | Low carbon martensitic stainless steel and method for production thereof A martensitic stainless steel sheet which is hard to be softened by tempering caused by heating during the use of a disk brake, can maintain the predetermined hardness, and has excellent punching workability, bending workability before quenching, and a particularly ... | 04/26/2005 |
| 6860950 | Method for cooling a hot-rolled material and corresponding cooling-line models To determine the temperature profile (Tm(t)) of a hot-rolled material (1) in a cooling line (5), a heat conduction equation which takes the following form ∂ e ... | 03/01/2005 |
| 6855218 | Method for producing a hot-rolled strip The invention relates to a method for producing hot strip which features good forming ability and increased strength. This is achieved in that a hot strip (W) which is produced in particular from continuous casting in the shape of reheated slabs or slabs obtained di... | 02/15/2005 |
| 6852180 | Method for making carbon steel bands, in particular packaging steel bands, and resulting bands The invention relates to the iron and steel industry. More specifically, the invention describes the manufacture of steel strip intended to be converted into thin packaging, such as for drinks and preserved food. ... | 02/08/2005 |
| 6821364 | Method of making a multiphase hot-rolled steel strip The invention concerns a method for making a multiphase hot-rolled steel strip comprising an ultra-fast cooling operations, which consists in carrying out said ultra-fast cooling operation after controlled slow cooling of the strip on a conventional slow cooling tab... | 11/23/2004 |
| 6818074 | High-ductility steel sheet excellent in press formability and strain age hardenability, and method for manufacturing the same A steel sheet composition contains appropriate amounts of C, Si, Mn, P, S, Al and N and 0.5 to 3.0% Cu. A composite structure of the steel sheet has a ferrite phase or a ferrite phase and a tempered martensite phase as a primary phase, and a secondary phase containi... | 11/16/2004 |
| 6818073 | Method of producing steel strip Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip of no more than 5 mm thickness having austenite grains that are coarse grains of 100-300 micro... | 11/16/2004 |
| 6818079 | Method for manufacturing a steel sheet A method for manufacturing a steel sheet comprising continuously casting a steel containing 0.04 to 0.2 wt. % C, 0.25 to 2 wt. % Si, 0.5 to 2.5 wt. % Mn, and 0.1 wt. % or less Al to form a slab; hot-rolling by rough-rolling the slab to form a sheet bar and finish-ro... | 11/16/2004 |
| 6814817 | Steel strap composition A heat treated steel strap usable in a strapping machine has a tensile strength of at least about 170 KSI, and an elongation of at least about 6.5 percent. The steel strap is fabricated from a coiled steel reduced by cold rolling. The strap has a composition of 0.30... | 11/09/2004 |
| 6776857 | Method and device for manufacturing a hot rolled steel strip The present invention provides an effective method for mechanically removing iron oxide films formed on the surfaces of a hot rolled steel strip with a high temperature. The method comprises the steps of: maintaining a steel strip coil at a high temperature of 400°... | 08/17/2004 |
| 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 |
| 6726786 | Process for the production of stove-finished structural components from ageing-sensitive steel The invention relates to processes for the production of a buckling-resistant stove-finished structural member from cold rolled and dressed strip (cold strip) non-ageing steel with high bake-hardening potential, more particularly of more than 70 N/mm2. Th... | 04/27/2004 |
| 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 |
| 6663725 | High strength steel sheet and method for manufacturing the same The present invention relates to a high strength steel sheet consisting essentially of 0.04 to 0.1% C, 0.5% or less Si, 0.5 to 2% Mn, 0.05% or less P, 0.005% or less 0, 0.005% or less S, by weight, having 10 μm or less of average ferritic grain size, and... | 12/16/2003 |
| 6652670 | Steel sheet and method for manufacturing the same The method for manufacturing steel sheet comprises the steps of: rough-rolling to form a sheet bar; finish-rolling the sheet bar to form a steel strip; applying primary cooling and secondary cooling to the finish-rolled steel strip; and coiling the second... | 11/25/2003 |
| 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 |
| 6632295 | High tensile strength hot-rolled steel sheet and method for manufacturing the same A high tensile strength hot-rolled steel sheet comprises 0.04 to 0.09% C, 0.1% or less Si, 0.5 to 1.5% Mn, 0.02% or less P, 0.01% or less S, 0.1% or less Al, 0.001 to 0.008% N, and 0.01 to 0.15% Ti, by mass %, the content of ingredient there each satisfyi... | 10/14/2003 |
| 6623573 | Steel sheet and method for manufacturing the same The method for manufacturing steel sheet comprises the steps of: forming a sheet bar; forming a steel strip; primary-cooling; air-cooling; secondary-cooling; and coiling. The sheet bar is finish-rolled at finish temperatures of (Ar3 transformat... | 09/23/2003 |
| 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 |
| 6585030 | Method of producing steel strip Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method includes continuously casting molten low carbon steel into a strip of no more than 5 mm thickness having austenite grains that are coarse grains of 10... | 07/01/2003 |
| 6581672 | Method for controlling a continuous strip steel casting process based on customer-specified requirements A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to ... | 06/24/2003 |
| 6554926 | Quenching heated metallic objects A method for quenching a heated metallic object includes discharging a plurality of discrete gas streams from a plurality of nozzle outlets so that the gas streams impinge substantially uniformly over the outer surface of the object, the distance between ... | 04/29/2003 |
| 6517955 | High strength galvanized steel plate excellent in adhesion of plated metal and formability in press working and high strength alloy galvanized steel plate and method for production thereof The invention relates to a high strength hot-dip galvanized and galvannealed steel sheets with excellent drawability for press forming and excellent plating adhesion that is useful as a member for automobiles, construction, electric devices and the like, ... | 02/11/2003 |
| 6488790 | Method of making a high-strength low-alloy hot rolled steel A method of making a high-strength low-alloy (HSLA) hot rolled steel. A high-strength low-alloy steel is made by hot rolling a steel slab of a specified composition. The hot rolling step is carried out at an austenitic hot roll finishing temperature. The ... | 12/03/2002 |
| 6475308 | Process for the production of a strip of hot rolled steel of very high strength, usable for shaping and particularly for stamping Process for the production of a hot rolled metal strip of very high strength, usable for shaping and particularly for stamping, characterized in that a steel of the following weight composition: carbon, 0.12-0.25%; manganese, 1-2%; aluminum, 0.03-2.5%; si... | 11/05/2002 |
| 6464808 | Method and apparatus for reducing wrinkles on a strip in a rapid cooling zone of a heat treatment line A method is disclosed for reducing the formation of wrinkles on metal strip subject to cooling in continuous heat treatment lines in which the strip passes through cooling zones through which cooling gas flows. The method includes the step of gradually mo... | 10/15/2002 |
