| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148595000 | Wire, rod, or filament | 44 |
| 20090242084 | Method for Producing a Shaft for Compressors - A method for the production of steels is provided. A heat treatment is carried out, in which the steel is hardened in water twice at different high temperatures, and subsequently subjected to an annealing treatment. It has been shown that the steel 26NiCrMoV14-5 has a high subzero toughness. In one aspect, the steel is usable down to a temperature of at least minus 170° C. | 10-01-2009 |
| 20090308503 | ROD OR WIRE MANUFACTURING SYSTEM, RELATED METHODS, AND RELATED PRODUCTS - A cooling unit, a heating-cooling operation including a cooling unit, a rod or wire manufacturing system, a method for manufacturing a rod or wire, a method for heat treating of a rod or wire, a method for treating metal, a steel rod or steel wire, and a treated metal having an improved tensile strength are disclosed. The cooling unit includes at least one adaptable quenching zone and at least one adaptable soaking zone. The at least one adaptable quenching zone is capable of quenching to a soaking temperature. The at least one adaptable soaking zone is capable of maintaining substantially the soak temperature. | 12-17-2009 |
| 20100212786 | High-Strength Steel Wire Excellent In Ductility and Method of Manufacturing the Same - The invention provides wire rod excellent in drawability and steel wire made from the wire rod as starting material with high productivity at good yield and low cost. A hard steel wire rod of a specified composition is heated in a specified temperature range to conduct post-reaustenization patenting and thereby obtain a high-carbon steel wire excellent in ductility that has a pearlite structure of an area ratio of 97% or greater and the balance of non-pearlite structures including bainite, degenerate-pearlite and pro-eutectoid ferrite and whose fracture reduction of area RA satisfies Expressions (1), (2) and (3) below: | 08-26-2010 |
| 20100263771 | STEEL WIRE ROD FOR BEARING STEEL, MANUFACTURING METHOD OF STEEL WIRE ROD FOR BEARING STEEL, HEAT TREATMENT METHOD OF STEEL BEARING, STEEL BEARING AND SOAKING METHOD OF BEARING STEEL - A heat treatment method of manufacturing high carbon bearing steel having excellent abrasion resistance and fatigue resistance, a steel wire rod for high carbon bearing steel subjected to the heat treatment, a manufacturing method of the steel wire rod, high carbon bearing steel manufactured by the heat treatment and a soaking method of a steel bloom used for manufacturing the steel wire rod. The heat treatment method of bearings includes the steps of: quenching a bearing-shaped steel part containing, by weight, 0.5% to 1.20% carbon and 1.0% to 2.0% silicon; and partitioning the quenched steel part at a temperature ranging from M | 10-21-2010 |
| 148596000 | Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum | 7 |
| 20080264529 | Apparatus and Method for Continuously Processing Long Bar by Heat Treatment Using Induction Heating - Provided is an apparatus and method for continuously processing a long bar by heat treatment using induction heating. The method includes checking and preparing carbon steel and low-alloy steel material; feeding the prepared material into a continuous induction-heating quenching furnace, heating the material at a temperature of 860° C. to 900° C., spraying a cooling water on the heated material, and completely quenching the material; horizontally conveying the quenched material by an automatic conveyor unit; feeding the conveyed material into a continuous induction-heating tempering furnace, heating the material at a temperature of 550° C. to 690° C., and completely tempering the material; checking the tempered material and correcting a deformed part of the tempered material; and relieving stress from the corrected material and finally checking the material. | 10-30-2008 |
| 20090007997 | Methods and Systems for Preventing Iron Oxide Formulation and Decarburization During Steel Tempering - The technology described herein provides a method and system to prevent iron oxide formation and decarburization during strand heat treating of a steel product without the subsequent required use of acid pickling, which has associated health and environmental risks. Additionally, this technology provides placing a coating, such as copper plating, to the surface of a steel wire prior to strand heat treating to avoid both iron oxide formation and decarburization through the surface of the steel wire by preventing interactions between the steel wire and the furnace atmosphere. To remove oxides formed by the plating metal, the oxides are chemically reduced by passing the steel wire through a reducing gas, electrolytically reduced by plating with the wire anodic, mechanically reduced through the use of brushes, or the like, or chemically reduced by acid pickling. | 01-08-2009 |
| 20090293998 | Oil-Tempered Wire and Method of Producing the Same - An oil-tempered wire that has high fatigue strength and toughness after the nitriding treatment, and a method of producing the same, and a spring using the oil-tempered wire are provided. The oil-tempered wire has a tempered martensite structure. A lattice constant of a nitride layer formed on a surface of the wire is 2.870 Å to 2.890 Å when the oil-tempered wire is nitrided. The oil-tempered wire is produced by wire drawing a steel wire and quenching and tempering the wire drawn steel wire. The quenching is performed after the radiation heating is performed at 850 to 950° C. for over 30 sec to 150 sec, and the tempering is performed at 400 to 600° C. | 12-03-2009 |
| 20110114231 | STEEL FILAMENT PATENTED IN BISMUTH - A cold drawn carbon steel filament has a surface with traces of bismuth. The steel filament can be used as a sawing wire or as part of a steel cord. During its manufacturing the steel filament has been subjected to a controlled cooling by bringing the steel filament in contact with bismuth. Bismuth may replace lead without harming the environment. | 05-19-2011 |
| 20130133789 | STEEL WIRE OF SPECIAL STEEL AND WIRE ROD OF SPECIAL STEEL - A predetermined composition is had, when a C content is represented by (C %), in a case of (C %) being not less than 0.35% nor more than 0.65%, a volume fraction of pearlite is 64×(C %)+52% or more, and in a case of (C %) being greater than 0.65% and 0.85% or less, the volume fraction of pearlite is not less than 94% nor more than 100%, and a structure of the other portion is composed of one or two of proeutectoid ferrite and bainite. Further, in a region to a depth of 1.0 mm from a surface, a volume fraction of pearlite block having an aspect ratio of 2.0 or more is not less than 70% nor more than 95%, and a volume fraction of pearlite having an angle between an axial direction and a lamellar direction on a cross section parallel to the axial direction of 40° or less is 60% or more with respect to all pearlite. | 05-30-2013 |
| 20150101716 | STEEL WIRE MATERIAL AND METHOD FOR MANUFACTURING SAME - A method of manufacturing a steel wire material that contains 0.05%-1.2% C (“%” means “% by mass,” same hereinafter for chemical components.), 0.01%-0.7% Si, 0.1%-1.5% Mn, 0.02% max. P (not including 0%), 0.02% max. S (not including 0%), and 0.005% max. N (not including 0%), with the remainder being iron and unavoidable impurities. The steel wire material has a scale 6.0-20 μm thick and holes of an equivalent circle diameter of 1 μm max. in said scale that occupy 10% by area max. Said scale does not detach in the cooling process after hot rolling or during storage or transportation but can readily detach during mechanical descaling. | 04-16-2015 |
| 20150361536 | FORCED WATER COOLING OF THICK STEEL WIRES - A method of and an equipment for controlled cooling of one or multiple previously heated, straight, and thick steel wire to a predetermined temperature range between 400° C. and 650° C. Each of the thick steel wires is subjected to a controlled cooling-transformation treatment from austenite to pearlite, which occurs substantially after the wire leaves a forced water cooling length. | 12-17-2015 |
| 148597000 | Nine percent or more chromium(Cr) (e.g., stainless steel, etc.) | 3 |
| 20090044884 | Treatment Process for Bars - Treatment process for stainless steel bars, in particular a solution quenching, to be performed directly in-line downstream of the rolling mill which makes it possible to obtain a material devoid of intergranular corrosion and with microstructural characteristics suitable for subsequent uses. Advantageously, said process also makes it possible to improve the productivity of the entire rolling plant. The treatment is suitable to be performed on austenitic, ferritic, or austeno-ferritic stainless steel bars, Al—Cu alloy bars, Nickel alloy bars, and all other alloys requiring rapid cooling in order to prevent undesired phase precipitations. Prevention of intergranular corrosion obtained with the treatment process of the invention makes it possible to prevent problems, and relative costs, during surface treatment of the bars and those that could occur in final use. | 02-19-2009 |
| 20110253269 | ANTIBACTERIAL STAINLESS STEEL WIRE AND MANUFACTURING METHOD THEREOF - In an antibacterial stainless steel wire and its manufacturing method, a wire drawing process, a cold working process, or a solution treatment integrated with an ageing treatment are used for making a precipitation of copper into an independent phase and in a granular form uniformly distributed in a stainless steel substrate, such that the stainless steel wire has an antibacterial effect. | 10-20-2011 |
| 20140041768 | FABRICATION METHOD FOR STEPPED FORGED MATERIAL - Provided is a method for fabricating a stepped forged material that can realize a uniform microscopic structure in both the large diameter flange portion and the small diameter shaft portion. This method for fabricating a stepped forged material comprises the following steps: a step for obtaining a primary forged material in which an austenite stainless steel billet is heated to 1000-1080° C., and, without any further heating, the material is forged by means of reciprocal forging into a round rod having along the entire length thereof a forging ratio of 1.5 or greater; a step for obtaining a secondary forged material, that forms the large diameter flange portion and the small diameter shaft portion, in which without reheating, the small diameter shaft portion is formed by means of reciprocal forging at a temperature where the surface temperature of the primary forged material never falls more than 200° C. lower than the abovementioned material heating temperature and the forging is completed before the surface temperature of the final forged portion falls more than 300° C. lower than the abovementioned heating temperature; and a step for performing a solution heat treatment in which the secondary forged material is heated to 1040-1100° C. for 30 minutes or longer. | 02-13-2014 |
| 148598000 | With working | 30 |
| 20080257460 | Method of producing forgings having excellent tensile strength and elongation from steel wire rods - A method of producing forgings includes the steps of: forming forgings from a steel wire rod; heating the forgings to a temperature range of 830˜900° C.; subjecting the forgings to first tempering at a temperature range of 100˜300° C. after the heating at 830˜900° C.; and subjecting the forgings to second tempering at a temperature range of 300˜400° C, after the first tempering. In the first tempering, the forgings are quenched in a salt bath having a temperature in the range of 100˜300° C., and are tempered for 60˜130 minutes. In the second tempering, the forgings are quenched in a salt bath having a temperature in the range of 300—400° C., and are tempered for 30˜150 minutes. | 10-23-2008 |
| 20080271824 | Spring Steel Wire - The present invention provides a spring steel wire which has a tempered martensitic structure brought about by quenching-tempering. The present spring steel wire has a 40% or higher reduction of area and a 1,000 MPa or higher shear yield stress after subjected to heat treatment for at least hours at a temperature ranging from 420° C. to 480° C. The present steel wire preferably constitutes, based on mass %, C: 0.50-0.75%, Si: 1.80-2.70%, Mn: 0.1-0.7%, Cr: 0.70-1.50%, Co: 0.02-1.00%, and remnants consisting of Fe and impurities, or constitutes, based on mass %, C: 0.50-0.75%, Si: 1.80-2.70%, Mn: over 0.7-1.50%, Cr: 0.70-1.50%, and remnants consisting of Fe and impurities. | 11-06-2008 |
| 20090007998 | WIRE WITH EXCELLENT SUITABILITY FOR DRAWING AND PROCESS FOR PRODUCING THE SAME - A hot-rolled wire rod excelling in wire drawability is provided, in which breakage can be suppressed even in heavy work from a large diameter. A hot-rolled wire rod contains C: 0.35 to 0.65% (percent by mass, hereinafter expressed as well), Si: 1.4 to 3.0%, Mn: 0.10 to 1.0%, Cr: 0.1 to 2.0%, P: 0.025% or less (exclusive of 0%), S: 0.025% or less (exclusive of 0%), N: 0.006% or less (exclusive of 0%), Al: 0.1% or less (exclusive of 0%), and O: 0.0030% or less (exclusive of 0%), with the remnant consisting of Fe and inevitable impurities; wherein the content of hydrogen in steel is 2.50 ppm (ppm by mass, hereinafter expressed as well) or less, and hardness (HV) is 460×C | 01-08-2009 |
| 20090151824 | HIGH STRENGTH WIRE ROD EXCELLENT IN DRAWABILITY AND METHOD OF PRODUCING SAME - A wire rod which is mainly composed of pearlite and has an area fraction of 5% or less of a non-pearlite structure composed of pro-eutectoid ferrite, degenerate-pearlite or bainite in a section, or has an area fraction of 10% or less of a non-pearlite structure in a portion from the surface to a depth of 100 μm. | 06-18-2009 |
| 20090277545 | High-Strength Wire Rod Excellent in Drawing Characteristics and Method of Manufacturing the Same - The invention provides wire rod excellent in drawability and steel wire made from the wire rod as starting material with high productivity at good yield and low cost. A hard steel wire rod of a specified composition is hot rolled, the hot-rolled steel is coiled in a specified temperature range, and the coiled steel is subjected to patenting at a predetermined cooling rate, thereby affording a high-carbon steel wire excellent in workability. It is high-strength steel wire excellent in drawability comprising a pearlite structure of an area ratio of 97% or greater and the balance of non-pearlite structures including bainite, degenerate-pearlite and pro-eutectoid ferrite and having a pearlite block size of not less than 20 μm and not greater than 45 μm. The invention also provides a high-carbon steel wire excellent in ductility, which is manufactured by subjecting the wire rod to intermediate patenting and cold drawing and has a tensile strength of 2800 MPa or greater. | 11-12-2009 |
| 20100175795 | Steel Wire Rod for High Strength and High Toughness Spring Having Excellent Cold Workability, Method for Producing the Same and Method for Producing Spring by Using the Same - Provided is a steel wire rod for a high strength and high toughness spring having excellent cold workability, the steel wire rod having a composition comprising: in weight %, C: 0.4 to 0.7%, Si: 1.5 to 3.5%, Mn: 0.3 to 1.0%, Cr: 0.01 to 1.5%, Ni: 0.01 to 1.0%, Cu: 0.01 to 1.0%, B: 0.005 to 0.02%, Al: 0.1% or less, O: 0.0020% or less, P: 0.02% or less, S: 0.02% or less, N: 0.02% or less, remainder Fe, and other unavoidable impurities, having a microstructure formed of ferrite and pearlite, and in which a prior (before cooling) austenite grain size is 8 μm or less. | 07-15-2010 |
| 20100263772 | WIRE RODS HAVING SUPERIOR STRENGTH AND DUCTILITY FOR DRAWING AND METHOD FOR MANUFACTURING THE SAME - There are provided a wire rod for drawing having superior strength and ductility and a method for manufacturing the same. The wire rod for drawing comprises, by weight: carbon (C): 0.87 to 1.0%, manganese (Mn): 0.1 to 0.60%, silicon (Si): 0.3 to 1.0%, sulfur (S): 0.010% or less (excluding 0%), phosphorus (P): 0.011% or less (excluding 0%), chromium (Cr): 0.1 to 0.5%, nitrogen (N): 0.007% or less (excluding 0%), and the balance of iron (Fe) and other inevitable impurities, wherein the sum of the Si and Cr contents satisfies the following equation: 0.6≦Si+Cr≦1.2 (the contents of Si and Cr is represented by ‘% by weight’), and the wire rod has a pearlite structure. | 10-21-2010 |
| 20110155290 | CASE HARDENING STEEL, CARBURIZED COMPONENT, AND MANUFACTURING METHOD OF CASE HARDENING STEEL - This case hardening steel has a chemical composition including, by mass %: C: 0.1 to 0.6%; Si: 0.02 to 1.5%; Mn: 0.3 to 1.8%; P: 0.025% or less; S: 0.001 to 0.15%; Al: over 0.05 to 1.0%; Ti: 0.05 to 0.2%; N: 0.01% or less; and O: 0.0025% or less, and further including, by mass %, one or more of Cr: 0.4 to 2.0%, Mo: 0.02 to 1.5%, Ni: 0.1 to 3.5%, V: 0.02 to 0.5%, and B: 0.0002 to 0.005%, and the balance consisting of iron and unavoidable impurities. | 06-30-2011 |
| 20110168302 | HIGH-STRENGTH ULTRATHIN STEEL WIRE AND METHOD OF MANUFACTURING THE SAME - The present invention provides a steel wire, including chemical components of: C: 0.7-1.2 mass %; Si: 0.05-2.0 mass %; and Mn: 0.2-2.0 mass %, with a balance including Fe and inevitable impurities, in which the steel wire has a pearlite structure, the average C concentration at a center portion of a ferrite phase in an outermost layer of the steel wire is 0.2 mass % or lower, and a residual compressive stress in the longitudinal direction of the steel wire in the outermost layer is 600 MPa or more. | 07-14-2011 |
| 20110284139 | High-carbon steel wire rod of high ductility - A high-carbon steel wire rod of high ductility for steel cord and the like is provided that experiences little breakage during drawing. The high-carbon steel wire rod of high ductility is a high-carbon steel wire rod fabricated by hot rolling that that has a carbon content of 0.7 mass % or greater, wherein 95% or greater of the wire rod metallographic structure is pearlite structure and the maximum pearlite block size of pearlite at the core of the hot-rolled wire rod is 65 μm or less. The high-carbon steel wire rod of high ductility has a tensile strength in a range of {248+980×(C mass %)}±40 MPa} and a reduction of area of {72.8−40×(C mass %) %} or greater. The high-carbon steel wire rod of high ductility is characterized in that the average pearlite block size at the core of the hot-rolled wire rod constituted by ferrite grain boundaries of an orientation difference of 9 degrees or greater as measured with an EBSP analyzer is 10 μm or greater and 30 μm or less. | 11-24-2011 |
| 20120037283 | High-Strength, High-Toughness Steel Wire Rod, and Method for Manufacturing Same - Provided are a high-strength, high-toughness steel wire rod and a method of manufacturing the same. The steel wire rod has a composition including 0.07 wt % to 0.14 wt % of aluminum (Al) and nitrogen (N) wherein Al:N (where Al and N denote wt % of each element) is in a range of 15:1 to 25:1. Since a steel wire rod having sufficient strength and toughness improvement effects can be obtained with a simple alloy component, a steel wire rod capable of allowing processing such as cold forging to be performed without an additional heat treatment may be provided. | 02-16-2012 |
| 20130087256 | STEEL WIRE WITH HIGH STRENGTH FOR COLD FORGING TO IMPROVE SERVICE LIFE OF MOLD AND METHOD OF MANUFACTURING THE SAME - The present invention relates to a pre-heat treatment steel wire with high strength for a cold forging which is used as a material for an engine, chassy and parts (bolts and shafts) of a steering device. The method includes: cold drawing of a wire rod containing 0.15-0.40 wt % of C, less than 1.5 wt % of Si, 0.30-2.0 wt % of Mn, less than 0.03 wt % of P, less than 0.03 wt % of S and the remainder including Fe and unavoidable impurities; rapidly heating the cold drawn wire rod in a series of high frequency induction heating devices over Ac3 transformation point for 30-90 seconds and maintaining such a heated state; rapidly cooling the wire rod in the heated state by water or oil; executing a tempering process by heating the wire rod to 500° C.-A1 transformation point for 30-90 seconds including a holding time at such a temperature; cooling the heated wire rod by water to achieve a wire rod with a tensile strength of 1,100-1,400 MPa; and cold drawing the wire rod at an area reduction rate of 25-40% to yield a tensile strength of 1,200-1,600 MPa. Although the inventive steel wire has a tensile strength more than 1,200 MPa, it is possible to execute cold forging and bring about a remarkable improvement of the service life of a mold. | 04-11-2013 |
| 20130098513 | ULTRA-HIGH-STRENGTH STEEL BAR AND METHOD FOR MANUFACTURING SAME - This invention relates to an ultra-high-strength steel bar and to a method of manufacturing the same, in which the steel bar includes C: 0.05 to 0.45 wt %, Si: 0.10 to 0.35 wt %, Mn: 0.1 to 0.85 wt %, Cr: 0.6 to 1.20 wt %, and Mo: 0.05 to 0.35 wt %, with the remainder being Fe, wherein a martensite structure is formed at a surface layer and a fine ferrite structure is formed at a center layer. | 04-25-2013 |
| 20130174947 | High-Toughness Cold-Drawn Non-Heat-Treated Wire Rod, and Method for Manufacturing Same - Provided is a wire rod for use in mechanical structure connections, vehicle components, or the like, and more particularly, to a wire rod which has superior toughness without being subjected to a heat treatment, and the strength of which is ensured through a cold-drawing process. Tot his end, provided are a high-toughness cold-drawn non-heat-treated wire rod and a method for manufacturing the same, wherein the wire rod comprises in % by weight: 0.2 to 0.3% of carbon (C), 0.1 to 0.2% of silicon (Si), 2.5 to 4.0% of manganese (Mn), 0.035% or less (but not 0%) of phosphorus (P), 0.04% or less (but not 0%) of sulfur (S), the remainder being iron (Fe) and unavoidable impurities. | 07-11-2013 |
| 20140027025 | WIRE ROD HAVING GOOD SUPERIOR SURFACE PROPERTIES, HIGH STRENGTH, AND HIGH TOUGHNESS, AND A METHOD FOR MANUFACTURING SAME - Provided is a wire rod having high strength and high toughness, which suppresses the generation of surface oxide and has superior surface properties through uniform oxide formation, and to a method for manufacturing same. For this purpose, a wire rod comprising 0.005˜ to 0.02 wt. % of Sb, having superior surface properties, high strength and high toughness, and a method for manufacturing same are provided. | 01-30-2014 |
| 20140150934 | WIRE ROD HAVING SUPERIOR HYDROGEN DELAYED FRACTURE RESISTANCE, METHOD FOR MANUFACTURING SAME, HIGH STRENGTH BOLT USING SAME AND METHOD FOR MANUFACTURING BOLT - The present invention relates to a wire rod used in bolts for automobile engines, for example, and more specifically to a wire rod having an improved resistance to hydrogen delayed fracture, to a manufacturing method for same, to a bolt using same and a method for manufacturing the bolt. Provided are a high strength wire rod having a superior resistance to hydrogen delayed fracture and a method for manufacturing same, a high strength bolt using the wire rod and a method for manufacturing same, wherein. | 06-05-2014 |
| 20140345756 | MARTENSITIC ALLOY COMPONENT AND PROCESS OF FORMING A MARTENSITIC ALLOY COMPONENT - A reduced nickel-chromium alloy component having by weight about 0.38% to about 0.43% C, about 0.15% to about 0.30% Si, about 1.00% to about 1.25% Mn, about 0.75% to about 0.90% Ni, about 1.00% to about 1.30% Cr, about 0.25% to about 0.35% Mo, about 0.05% to about 0.12% V, up to about 0.015% S, up to about 0.015% P, up to about 0.15% Cu, and balance iron and incidental impurities. The component has a hardenability corresponding to an ideal diameter of greater than about 10 inches. | 11-27-2014 |
| 20160145712 | HIGH CARBON STEEL WIRE ROD AND METHOD FOR MANUFACTURING SAME - A high carbon steel wire rod includes required amounts of chemical components and a remainder including Fe and impurities; in which the area ratio of pearlite in a cross section perpendicular to a longitudinal direction is 95% or more and a remainder includes a non-pearlite structure which includes one or more of a bainite, a degenerate pearlite, a proeutectoid ferrite and a proeutectoid cementite; the average block size of the pearlite is 15 μm to 35 μm and the area ratio of the pearlite having a block size of 50 μm or more is 20% or less; and the area ratio of a region where a lamellar spacing of the pearlite is 150 nm or less is 20% or less in a region within a depth from a surface of the high carbon steel wire rod of 1 mm or less. | 05-26-2016 |
| 20160145713 | STEEL ROD AND HIGH STRENGTH STEEL WIRE HAVING SUPERIOR DUCTILITY AND METHODS OF PRODUCTION OF SAME - The present invention inexpensively provides with high productivity and good yield a steel rod superior in drawability and a steel wire superior in twistability using the same as a material, that is, draws a high strength steel rod superior in ductility where the chemical components contain C: 0.80 to 1.20%, Si: 0.1 to 1.5%, Mn: 0.1 to 1.0%, Al: 0.01% or less, Ti: 0.01% or less, one or both of W: 0.005 to 0.2% and Mo: 0.003 to 0.2%, N: 10 to 30 ppm, B: 4 to 30 ppm (of which, solute B is 3 ppm or more), and O: 10 to 40 ppm, which has a balance of Fe and unavoidable impurities, has an area percentage of pearlite structures of 97% or more, has a balance of non-pearlite structures, and has a total of the area percentage of the non-pearlite structures and the area percentage of the coarse pearlite structures of 15% or less, to obtain high strength steel wire superior in ductility having a tensile strength of 3600 MPa or more and a number density of voids of lengths of 5 μm or more at the center of 100/mm | 05-26-2016 |
| 20160145724 | BEARING STEEL HAVING IMPROVED FATIGUE DURABILITY AND METHOD OF MANUFACTURING THE SAME - A bearing steel includes 1.0 to 1.3 wt % carbon; 0.9 to 1.6 wt % silicon; 0.5 to 1.0 wt % manganese; 1.5 to 2.5 wt % nickel; 1.5 to 2.5 wt % chromium; 0.2 to 0.5 wt % molybdenum; 0.01 to 0.06 wt % aluminum; 0.01 to 0.1 wt % copper; at least one selected from the group consisting of more than 0 wt % and less than 0.38 wt % vanadium and more than 0 wt % and less than 0.02 wt % niobium; and a balance of iron. | 05-26-2016 |
| 148599000 | With working at or below 120`C or unspecified cold working | 5 |
| 20100051144 | EXCELLENT COLD-WORKABILITY EXHIBITING HIGH-STRENGTH STEEL, WIRE OR STEEL BAR OR HIGH-STRENGTH SHAPED ARTICLE, AND PROCESS FOR PRODUCING THEM - There are provided an excellent cold-workability exhibiting high-strength steel wire or steel bar, or high-strength shaped article and a process for producing them. In particular, there is provided a process comprising carrying out hot working at 350 to 800° C. of a steel ingot, cast slab, steel slab or steel semifinished product having a C content of not greater than the solid solution limit of carbon of ferrite phase at Ae | 03-04-2010 |
| 20100126643 | STEEL ROD AND HIGH STRENGTH WIRE HAVING SUPERIOR DUCTILITY AND METHODS OF PRODUCTION OF SAME - The present invention inexpensively provides with high productivity and good yield a steel rod superior in drawability and a steel wire superior in twistability using the same as a material, that is, draws a high strength steel rod superior in ductility where the chemical components contain C: 0.80 to 1.20%, Si: 0.1 to 1.5%, Mn: 0.1 to 1.0%, Al: 0.01% or less, Ti: 0.01% or less, one or both of W: 0.005 to 0.2% and Mo: 0.003 to 0.2%, N: 10 to 30 ppm, B: 4 to 30 ppm (of which, solute B is 3 ppm or more), and O: 10 to 40 ppm, which has a balance of Fe and unavoidable impurities, has an area percentage of pearlite structures of 97% or more, has a balance of non-pearlite structures, and has a total of the area percentage of the non-pearlite structures and the area percentage of the coarse pearlite structures of 15% or less, to obtain high strength steel wire superior in ductility having a tensile strength of 3600 MPa or more and a number density of voids of lengths of 5 μm or more at the center of 100/mm | 05-27-2010 |
| 20120227872 | ULTRA-HIGH-STRENGTH STEEL WIRE HAVING EXCELLENT RESISTANCE TO DELAYED FRACTURE AND MANUFACTURING METHOD THEREOF - An ultra-high-strength steel wire rod having excellent resistance to delayed fracture includes, by wt %, 0.7-1.2% C, 0.25-0.5% Si, 0.5-0.8% Mn, 0.02-0.1% V and a balance of Fe and inevitable impurities. The method includes the steps of heating the above steel composition to 1100° C. or lower and hot rolling at a temperature of 900-1000° C., followed by cooling to 600-650° C. at a prescribed rate, followed by cold drawing at a reduction ratio of 60-80%. | 09-13-2012 |
| 20150361535 | PROCESS FOR MANUFACTURING A PROFILED STEEL WIRE - A process for the manufacture of a profiled wire of hydrogen-embrittlement-resistant, low-alloy carbon steel for flexible pipelines for the offshore oil and gas operations sector is provided. The process includes providing a low-alloy carbon steel wire rod having a composition including, expressed in percentages by weight of the total mass 0.75| 12-17-2015 | |
| 20160068925 | STEEL PRODUCT AND METHOD OF PRODUCING THE PRODUCT - A method of producing a steel product includes heat treating a mechanically worked steel product and maintaining or increasing the ductility and maintaining or increasing the yield stress of the steel. A mechanically worked and heat treated steel product made by the method. | 03-10-2016 |
| 20100051144 | EXCELLENT COLD-WORKABILITY EXHIBITING HIGH-STRENGTH STEEL, WIRE OR STEEL BAR OR HIGH-STRENGTH SHAPED ARTICLE, AND PROCESS FOR PRODUCING THEM - There are provided an excellent cold-workability exhibiting high-strength steel wire or steel bar, or high-strength shaped article and a process for producing them. In particular, there is provided a process comprising carrying out hot working at 350 to 800° C. of a steel ingot, cast slab, steel slab or steel semifinished product having a C content of not greater than the solid solution limit of carbon of ferrite phase at Ae | 03-04-2010 |
| 20100126643 | STEEL ROD AND HIGH STRENGTH WIRE HAVING SUPERIOR DUCTILITY AND METHODS OF PRODUCTION OF SAME - The present invention inexpensively provides with high productivity and good yield a steel rod superior in drawability and a steel wire superior in twistability using the same as a material, that is, draws a high strength steel rod superior in ductility where the chemical components contain C: 0.80 to 1.20%, Si: 0.1 to 1.5%, Mn: 0.1 to 1.0%, Al: 0.01% or less, Ti: 0.01% or less, one or both of W: 0.005 to 0.2% and Mo: 0.003 to 0.2%, N: 10 to 30 ppm, B: 4 to 30 ppm (of which, solute B is 3 ppm or more), and O: 10 to 40 ppm, which has a balance of Fe and unavoidable impurities, has an area percentage of pearlite structures of 97% or more, has a balance of non-pearlite structures, and has a total of the area percentage of the non-pearlite structures and the area percentage of the coarse pearlite structures of 15% or less, to obtain high strength steel wire superior in ductility having a tensile strength of 3600 MPa or more and a number density of voids of lengths of 5 μm or more at the center of 100/mm | 05-27-2010 |
| 20120227872 | ULTRA-HIGH-STRENGTH STEEL WIRE HAVING EXCELLENT RESISTANCE TO DELAYED FRACTURE AND MANUFACTURING METHOD THEREOF - An ultra-high-strength steel wire rod having excellent resistance to delayed fracture includes, by wt %, 0.7-1.2% C, 0.25-0.5% Si, 0.5-0.8% Mn, 0.02-0.1% V and a balance of Fe and inevitable impurities. The method includes the steps of heating the above steel composition to 1100° C. or lower and hot rolling at a temperature of 900-1000° C., followed by cooling to 600-650° C. at a prescribed rate, followed by cold drawing at a reduction ratio of 60-80%. | 09-13-2012 |
| 20150361535 | PROCESS FOR MANUFACTURING A PROFILED STEEL WIRE - A process for the manufacture of a profiled wire of hydrogen-embrittlement-resistant, low-alloy carbon steel for flexible pipelines for the offshore oil and gas operations sector is provided. The process includes providing a low-alloy carbon steel wire rod having a composition including, expressed in percentages by weight of the total mass 0.75| 12-17-2015 | |
| 20160068925 | STEEL PRODUCT AND METHOD OF PRODUCING THE PRODUCT - A method of producing a steel product includes heat treating a mechanically worked steel product and maintaining or increasing the ductility and maintaining or increasing the yield stress of the steel. A mechanically worked and heat treated steel product made by the method. | 03-10-2016 |
| 148599000 | With working at or below 120C or unspecified cold working | 5 |
| 20100051144 | EXCELLENT COLD-WORKABILITY EXHIBITING HIGH-STRENGTH STEEL, WIRE OR STEEL BAR OR HIGH-STRENGTH SHAPED ARTICLE, AND PROCESS FOR PRODUCING THEM - There are provided an excellent cold-workability exhibiting high-strength steel wire or steel bar, or high-strength shaped article and a process for producing them. In particular, there is provided a process comprising carrying out hot working at 350 to 800° C. of a steel ingot, cast slab, steel slab or steel semifinished product having a C content of not greater than the solid solution limit of carbon of ferrite phase at Ae | 03-04-2010 |
| 20100126643 | STEEL ROD AND HIGH STRENGTH WIRE HAVING SUPERIOR DUCTILITY AND METHODS OF PRODUCTION OF SAME - The present invention inexpensively provides with high productivity and good yield a steel rod superior in drawability and a steel wire superior in twistability using the same as a material, that is, draws a high strength steel rod superior in ductility where the chemical components contain C: 0.80 to 1.20%, Si: 0.1 to 1.5%, Mn: 0.1 to 1.0%, Al: 0.01% or less, Ti: 0.01% or less, one or both of W: 0.005 to 0.2% and Mo: 0.003 to 0.2%, N: 10 to 30 ppm, B: 4 to 30 ppm (of which, solute B is 3 ppm or more), and O: 10 to 40 ppm, which has a balance of Fe and unavoidable impurities, has an area percentage of pearlite structures of 97% or more, has a balance of non-pearlite structures, and has a total of the area percentage of the non-pearlite structures and the area percentage of the coarse pearlite structures of 15% or less, to obtain high strength steel wire superior in ductility having a tensile strength of 3600 MPa or more and a number density of voids of lengths of 5 μm or more at the center of 100/mm | 05-27-2010 |
| 20120227872 | ULTRA-HIGH-STRENGTH STEEL WIRE HAVING EXCELLENT RESISTANCE TO DELAYED FRACTURE AND MANUFACTURING METHOD THEREOF - An ultra-high-strength steel wire rod having excellent resistance to delayed fracture includes, by wt %, 0.7-1.2% C, 0.25-0.5% Si, 0.5-0.8% Mn, 0.02-0.1% V and a balance of Fe and inevitable impurities. The method includes the steps of heating the above steel composition to 1100° C. or lower and hot rolling at a temperature of 900-1000° C., followed by cooling to 600-650° C. at a prescribed rate, followed by cold drawing at a reduction ratio of 60-80%. | 09-13-2012 |
| 20150361535 | PROCESS FOR MANUFACTURING A PROFILED STEEL WIRE - A process for the manufacture of a profiled wire of hydrogen-embrittlement-resistant, low-alloy carbon steel for flexible pipelines for the offshore oil and gas operations sector is provided. The process includes providing a low-alloy carbon steel wire rod having a composition including, expressed in percentages by weight of the total mass 0.75| 12-17-2015 | |
| 20160068925 | STEEL PRODUCT AND METHOD OF PRODUCING THE PRODUCT - A method of producing a steel product includes heat treating a mechanically worked steel product and maintaining or increasing the ductility and maintaining or increasing the yield stress of the steel. A mechanically worked and heat treated steel product made by the method. | 03-10-2016 |
| 20100051144 | EXCELLENT COLD-WORKABILITY EXHIBITING HIGH-STRENGTH STEEL, WIRE OR STEEL BAR OR HIGH-STRENGTH SHAPED ARTICLE, AND PROCESS FOR PRODUCING THEM - There are provided an excellent cold-workability exhibiting high-strength steel wire or steel bar, or high-strength shaped article and a process for producing them. In particular, there is provided a process comprising carrying out hot working at 350 to 800° C. of a steel ingot, cast slab, steel slab or steel semifinished product having a C content of not greater than the solid solution limit of carbon of ferrite phase at Ae | 03-04-2010 |
| 20100126643 | STEEL ROD AND HIGH STRENGTH WIRE HAVING SUPERIOR DUCTILITY AND METHODS OF PRODUCTION OF SAME - The present invention inexpensively provides with high productivity and good yield a steel rod superior in drawability and a steel wire superior in twistability using the same as a material, that is, draws a high strength steel rod superior in ductility where the chemical components contain C: 0.80 to 1.20%, Si: 0.1 to 1.5%, Mn: 0.1 to 1.0%, Al: 0.01% or less, Ti: 0.01% or less, one or both of W: 0.005 to 0.2% and Mo: 0.003 to 0.2%, N: 10 to 30 ppm, B: 4 to 30 ppm (of which, solute B is 3 ppm or more), and O: 10 to 40 ppm, which has a balance of Fe and unavoidable impurities, has an area percentage of pearlite structures of 97% or more, has a balance of non-pearlite structures, and has a total of the area percentage of the non-pearlite structures and the area percentage of the coarse pearlite structures of 15% or less, to obtain high strength steel wire superior in ductility having a tensile strength of 3600 MPa or more and a number density of voids of lengths of 5 μm or more at the center of 100/mm | 05-27-2010 |
| 20120227872 | ULTRA-HIGH-STRENGTH STEEL WIRE HAVING EXCELLENT RESISTANCE TO DELAYED FRACTURE AND MANUFACTURING METHOD THEREOF - An ultra-high-strength steel wire rod having excellent resistance to delayed fracture includes, by wt %, 0.7-1.2% C, 0.25-0.5% Si, 0.5-0.8% Mn, 0.02-0.1% V and a balance of Fe and inevitable impurities. The method includes the steps of heating the above steel composition to 1100° C. or lower and hot rolling at a temperature of 900-1000° C., followed by cooling to 600-650° C. at a prescribed rate, followed by cold drawing at a reduction ratio of 60-80%. | 09-13-2012 |
| 20150361535 | PROCESS FOR MANUFACTURING A PROFILED STEEL WIRE - A process for the manufacture of a profiled wire of hydrogen-embrittlement-resistant, low-alloy carbon steel for flexible pipelines for the offshore oil and gas operations sector is provided. The process includes providing a low-alloy carbon steel wire rod having a composition including, expressed in percentages by weight of the total mass 0.75| 12-17-2015 | |
| 20160068925 | STEEL PRODUCT AND METHOD OF PRODUCING THE PRODUCT - A method of producing a steel product includes heat treating a mechanically worked steel product and maintaining or increasing the ductility and maintaining or increasing the yield stress of the steel. A mechanically worked and heat treated steel product made by the method. | 03-10-2016 |
