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| Number | Title | Issue Date |
| 7776162 | Steels with few alumina clusters A steel having few alumina clusters prepared by casting liquid steel deoxidized with Al, with the addition of one or more rare-earth metals (REM) selected from the group of Ce, La, Pr and Nd in which: (a) The REM-oxide-content in o... | 08/17/2010 |
| 7413617 | Composite structure sheet steel with excellent elongation and stretch flange formability The present invention provide a TRIP-type composite structure steel plate of the TPF steel type in which elongation and stretch flange formability at room temperature are improved by controlling the morphology of the second-phase structure. In a composite structure ... | 08/19/2008 |
| 7347904 | Low carbon steel sheet and low carbon steel slab and process for producing same The present invention provides a low carbon steel sheet and a low carbon steel slab on which formation of surface defects can be surely prevented by preventing aggregation of inclusions in the molten steel and finely dispersing inclusions in the steel sheet or slab,... | 03/25/2008 |
| 7258756 | Very thin, high carbon steel wire and method of producing same The very thin, high carbon wire is 0.05 to 0.50 mm in diameter and comprises, in mass %, 0.90-1.20% of C, 0.05-1.2% of Si, 0.2-1.0% of Mn, and 0.0050% or less of N, with the balance being iron and impurities. In a differential scanning thermal analysis curve A of th... | 08/21/2007 |
| 7105066 | Steel plate having superior toughness in weld heat-affected zone and welded structure made therefrom A welding structural steel product exhibiting a superior heat affected zone toughness, comprising, in terms of percent by weight, 0.03 to 0.17% C, 0.01 to 0.5% Si, 0.4 to 2.0% Mn, 0.005 to 0.2% Ti, 0.0005 to 0.1% Al, 0.008 to 0.030% N, 0.0003 to 0.01% 0.00 1 to 0.2%... | 09/12/2006 |
| 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 |
| 6899774 | High-toughness wear-resistant steel A primary purpose is to provide an inexpensive high-toughness wear-resistant steel having satisfactory toughness where its hardness is HRC 55 or more. This steel contains at least 0.21 to 0.80 wt % C; 0.3 to 2.0 wt % Al; and 0.5 to 4.0 wt % Ni as essential component... | 05/31/2005 |
| 6652991 | Ductile NiAl intermetallic compositions The addition of small amounts of CeO2 and Cr to intermetallic compositions of NiAl and FeAl improves ductility, thermal stability, thermal shock resistance, and resistance to oxidation, sulphidization and carburization.... | 11/25/2003 |
| 6627313 | Spindle-shaped magnetic metal particles containing iron as main component and processes for producing the same Spindle-shaped magnetic metal particles containing iron as a main component of the present invention, have an average major axis diameter (L) of 0.05 to 0.15 μm; a coercive force of 111.4 to 143.2 kA/m; a Co content of from 0.5 to less than 5 atm % based... | 09/30/2003 |
| 6589369 | High fatigue strength steel sheet excellent in burring workability and method for producing the same A compound structure steel sheet excellent in burring workability made of a steel containing, by mass, 0.01 to 0.3% of C, 0.01 to 2% of Si, 0.05 to 3% of Mn, 0.1% or less of P, 0.01% or less of S, and 0.005 to 1% or Al, and having the microstructure being... | 07/08/2003 |
| 6517934 | Magnetic recording medium containing nanometer-size substantially spherical or ellipsoidal fe-b-re magnetic powder and method for producing magnetic powder A rare earth-iron-boron magnetic powder comprising a rare earth element, iron and boron, which has a coercive force of 80 to 400 kA/m, a saturation magnetization of 10 to 25 μW/g, an average particle size of 5 to 200 nm, and a particulate or ellipsoidal ... | 02/11/2003 |
| 6423426 | High tensile hot-dip zinc-coated steel plate excellent in ductility and method for production thereof A steel sheet having a composition comprising C: 0.05-0.20 mass %, Si: 0.3-1.8 mass %, Mn: 1.0-3.0 mass %, Fe of the balance and inevitable impurities is subjected to a primary step of primary heat treatment and subsequent rapid cooling to Ms point or low... | 07/23/2002 |
| 6344093 | High tensile strength steel product for high heat input welding, having excellent toughness in heat-affected zone A high tensile strength steel product for high heat input welding having excellent toughness in the heat-affected zone and having a tensile strength of at least 490 MPa contains, in terms of percent by weight, from about 0.05% to about 0.18% of C, 0.6% or... | 02/05/2002 |
| 6309479 | Spindle-shaped goethite particles, spindle-shaped hematite particles and magnetic spindle-shaped metal particles containing iron as main component Spindle-shaped metal particles and a process for producing magnetic spindle-shaped metal particle containing iron as a main component, which contains cobalt of 8 to 45 atm % calculated as Co, aluminum of 5 to 20 atm %, calculated as Al, and a rare earth e... | 10/30/2001 |
| 6294131 | Heat resistant steel A steel composition particularly useful for components of solid oxide fuel cells, for example a connector plate for collecting electrical current from a solid oxide fuel cell, consisting of, in weight percent, 18-28.5 Cr, 0.001-0.20 C, | 09/25/2001 |
| 6280538 | Hot rolled high strength steel sheet with excellent formability A hot rolled high strength steel sheet having a satisfactory strength-elongation balance and an stretch frangibility and with excellent formability comprising a steel, which contains: C :0.05 ~ 0.15% Si ... | 08/28/2001 |
| 5891271 | S-containing Fe--Ni alloys for electron gun parts and punched electron gun parts Fe--Ni alloys for electron gun parts consisting of, all by weight, 30-55% Ni, 0.0010-0.200% S, up to 0.8% Mn, from not less than 0.005 to less than 0.5% in total of one or more elements selected from the group consisting of Ti, Mg, Ce and Ca, and the bala... | 04/06/1999 |
| 5743972 | Heavy-wall structural steel and method A heavy-wall steel having a flange thickness of about 40 mm or more and possessing excellent strength, toughness, weldability, and seismic resistance capable of being used for structure members such as columns and beams of high-rise buildings. The heavy-w... | 04/28/1998 |
| 5656104 | Metal mold for glass forming The present invention aims to provide a metal mold for glass, which needs not apply any swab in molding of glass, enabling no-swabbing glass forming. The alloy for the mold comprises by weight Cu: 10 to 80%, Al: 4 to 11%, Cr: 3 to 16%, Ni: 2 to 36%, and a... | 08/12/1997 |
| 5582658 | High strength steel sheet adapted for press forming and method of producing the same A high strength steel sheet adapted for press forming and method producing the same. The steel sheet containing by weight C: 0.01-0.1%, Si: 0.1-1.2%, Mn: not more than 3.0%, Ti:a value of (Ti%-1.5S%-3.43N%)/C% being 4-12, B: 0.0005-0.005%, Al: not more th... | 12/10/1996 |
| 5534084 | Continuous-cast slab and steel product having dispersed fine particles A cast slab comprising fine particles of oxides and MnS, said oxide comprising an Mn silicate, with Mn oxide occupying 50 to 80% by weight of the sum of Mn oxide and Si oxide, unavoidably included oxides, and an optionally added oxide of at least one memb... | 07/09/1996 |
| 5370752 | Cast steel suitable for machining To provide graphitic cast steel given with improved machining and mechanical properties, a large number of fine graphite nodules can be crystallized in the cast steel, and the occurrence of chain-like formation of graphite crystals can be avoided by limit... | 12/06/1994 |
| 5238645 | Iron-aluminum alloys having high room-temperature and method for making same Iron-aluminum alloys having selectable room-temperature ductilities of greater than 20%, high resistance to oxidation and sulfidation, resistant pitting and corrosion in aqueous solutions, and possessing relatively high yield and ultimate tensile strength... | 08/24/1993 |
| 5180449 | Galvanized high-strength steel sheet having low yield ratio and method of producing the same A galvanized steel sheet is provided which has a tensile strength of not less than 80 kgf/mm2 and a yield ratio of not more than 60%, and which is applicable to members of an automobile body, particularly those requiring strength. By appropriat... | 01/19/1993 |
| 4880480 | High strength hot rolled steel sheet for wheel rims A high strength hot rolled steel sheet for wheel rims contains, by weight, from 0.05 to 0.15% of C, from 0.05 to 0.5% of Si, from 1.0 to 1.6% of Mn, from 0.01 to 0.05% of Al, from 0.005 to 0.025% of Ti and from 15 to 60 ppm of N, with the content of P lim... | 11/14/1989 |
| 4878964 | Permanent magnetic alloy and method of manufacturing the same A permanent magnetic alloy essentially consists of 10 to 40% by weight of R, 0.1 to 0.8% by weight of boron, 50 to 300 ppm by weight of oxygen and the balance of iron, where R is at least one component selected from the group consisting of yttrium and the... | 11/07/1989 |
| 4836869 | Hydrogen-resistant high-strength steels and the method for the manufacture thereof A high-strength steel having improved resistance to hydrogen embrittlement characterized as being essentially free of manganese and having a stable rare earth oxymetalloid dispersion consisting of, e.g., lanthanum oxysulfide and lanthanum phosphate. The s... | 06/06/1989 |
| 4664724 | Permanent magnetic alloy and method of manufacturing the same A permanent magnetic alloy essentially consists of 10 to 40% by weight of R, 0.1 to 8% by weight of boron, 50 to 300 ppm by weight of oxygen and the balance of iron, where R is at least one component selected from the group consisting of yttrium and the r... | 05/12/1987 |
| 4576640 | Hydrogen storage material A hydrogen storage material for releasably storing hydrogen having a microstructure containing an alloy phase of the general formula R2 Fe17, wherein R is cerium and lanthanum and, optionally, at least one other rare earth element, a... | 03/18/1986 |
| 4426235 | Cold-rolled high strength steel plate with composite steel structure of high r-value and method for producing same A cold-rolled high strength steel plate with excellent formability and baking hardenability, has the composition (% by weight) 0.2-0.15% of C, 0.02-0.7% of Mn, 0.01-0.1% of Al and 0.002-0.01% of N, optionally at least one element selected from the group c... | 01/17/1984 |
| 4421573 | Method for producing hot-rolled dual-phase high-tensile steel sheets Dual-phase high-tensile steel sheets having a composite structure consisting of martensite and ferrite and a tensile strength of the order of 50-80 kg/mm2 in an as-hot-rolled state are produced by a method which comprises preparing as a startin... | 12/20/1983 |
| 4407681 | High tensile steel and process for producing the same A high tensile steel which has a satisfactory yield strength of 60 kg/mm2 or more and excellent resistances to sulfide corrosive cracking and corrosion, and which comprises, as indispensable components, 0.05 to 0.50 wt % of C, 0.1 to 1.0 wt % o... | 10/04/1983 |
| 4339284 | Method of producing non-ageing cold rolled steel sheets A method of producing substantially non-ageing cold rolled steel sheets having a remarkably excellent deep drawing property, wherein an extra low-carbon steel is melted together with niobium in an amount of less than the necessary amount for fixing comple... | 07/13/1982 |
| 4316753 | Method for producing low alloy hot rolled steel strip or sheet having high tensile strength, low yield ratio and excellent total elongation A method for producing a low alloy hot rolled steel strip or sheet comprising hot rolling a steel slab at a finishing temperature not higher than the Ar3 transformation temperature plus 60° C. and cooling and coiling the hot rolled strip at a ... | 02/23/1982 |
| 4244754 | Process for producing high damping capacity alloy and product A method for producing a high damping capacity alloy comprising 0.1-10% by eight of at least one of W, Si and Ti and the remainder of Fe and, further comprising 0.01-45% in total, as a subingredient, of at least one of Cr, Al, Sb, Nb, V, Ta, Sn, Zn, Zr, Cd... | 01/13/1981 |
| 4204887 | High damping capacity alloy A high damping capacity alloy comprising 1-45% by weight of Co and the remainder being Fe and, as the case may be, further comprising 0.01-30% in total, as an additional component, of at least one of Ni, Cr, Al, Cu, Mn, Sb, Nb, Mo, W, Ti, V, Ta, Si, Sn, Z... | 05/27/1980 |
| 4098622 | Earth-working implement An earth-working implement of high carbon-high hardness steel wherein the globular shape of the sulfides is retained during the manufacturing process by the addition of strong sulfide-forming additives whereby the "fracture toughness" in the rolling direc... | 07/04/1978 |
| 4092179 | Method of producing high strength cold rolled steel sheet A high-strength, cold rolled steel sheet product characterized by a rimmed surface and an aluminum killed, columbium-containing core is produced by hot rolling at a finishing temperature above its Ar3 temperature and coiling at a temperature be... | 05/30/1978 |
| 4042381 | Control of inclusion morphology in steel Effective, low cost sulfide shape control is obtained using in combination titanium and a rare earth metal, e.g., mischmetal, in steels meeting the following specifications: at least 0.020% aluminum, no more than 0.010% nitrogen, no more than 0.025% sulfu... | 08/16/1977 |
| 3982969 | Low silicon high strength low alloy steel The incidence of rare earth oxy-sulfide inclusions in killed hot-rolled high strength low alloy steels of the vanadium-nitrogen type is lowered through restriction of the silicon content to 0.05% maximum without a concurrent reduction of yield strength to... | 09/28/1976 |
