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| Number | Title | Issue Date |
| 8142577 | 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... | 03/27/2012 |
| 7828918 | Method for thermomechanical treatment of steel The invention relates to a method for the thermomechanical treatment of steel. According to said method, the parent material is heated to a temperature in excess of the re-crystallization temperature, the structure is austenitized, held at an equalized temperature a... | 11/09/2010 |
| 7393422 | Method for producing high carbon steel wire rod superior in wire-drawability The high carbon steel wire rod contains 0.65% to 1.20% of C, 0.05% to 1.2% of Si, 0.2% to 1.0% of Mn, and 0.35% or less (including 0%) of Cr, further contains P and S each in an amount restricted to 0.02% or less, where 80% or more of the metal structure is constitu... | 07/01/2008 |
| 7255758 | Steel wire and method of manufacturing the same A steel wire of pearlite structure containing 0.8-1.0 mass % of C and 0.8-1.5 mass % of Si is disclosed. In the cross section of the steel wire the difference in average hardness between a region up to 100 μm from the surface thereof and a deeper region is within 5... | 08/14/2007 |
| 7166174 | Bundle drawn stainless steel fibers The invention relates to stainless steel fibers obtained by bundled drawing of stainless steel wires embedded in a matrix material. The composition of the stainless steel fibers comprises iron and the following components expressed in percent by weight: C £ 0.05%, ... | 01/23/2007 |
| 7081174 | Process for producing steel products having improved grain size properties and machinability Disclosed is a production process of a steel product for induction hardening and a steel product for carburizing, having improved grain size properties and machinability. This production process comprises the steps of: providing an ingot or bloom comprising a steel ... | 07/25/2006 |
| 7074282 | Steel wire rod for hard drawn spring, drawn wire rod for hard drawn spring and hard drawn spring, and method for producing hard drawn spring Disclosed is a steel wire rod for hard-drawn springs capable of exhibiting fatigue strength and sag resistance equivalent to or higher than springs made of an oil-tempered wire. The steel wire rod contains carbon in a range from 0.5 to less than 0.7 mass %, silicon ... | 07/11/2006 |
| 7048810 | Method of manufacturing hot formed high strength steel A method for processing a hot formed, high-tensile-strength steel having an ultimate tensile strength (UTS) of at least about 730 MPa (105 ksi) and excellent toughness to retain essentially all the strength and toughness is provided. This processing is needed for th... | 05/23/2006 |
| 7037387 | Steel wire excellent in descalability in mechanical descaling and method for production thereof The present invention provides a steel wire rod excellent in scale peelability for mechanical descaling, and a manufacturing method thereof. The steel wire rod in accordance with the present invention has: a base metal portion formed of a steel containing C i... | 05/02/2006 |
| 7013695 | Method for drawing continuous fiber An apparatus and method is disclosed for drawing continuous metallic wire having a first diameter to a metallic fiber having a reduced second diameter. A feed mechanism moves the wire at a first linear velocity. A laser beam heats a region of the wire to an elevated... | 03/21/2006 |
| 6978594 | Process for the manufacture of a disintegrating roll of an open-end spinning apparatus as well as a disintegrating roll made by such a process A sawtooth wire to be laid in a groove of a shredding-element-carrier of a disintegrating roll of an open-end spinning apparatus is brought into a shape, which essentially represents that shape, which the sawtooth wire is to assume on the shredding-element carrier. ... | 12/27/2005 |
| 6949149 | High strength, high carbon steel wire To achieve a drawn wire with a tensile strength defined by the equation of Y=Yo exp(A2εd) wherein Y is the tensile strength in MPa (N/mm2), Yo is the strength of as patented wire, A2 is a coefficient... | 09/27/2005 |
| 6936119 | Method for producing metallic, non-rotationally symmetrical rings with a constant wall thickness over their circumference The invention is directed to a method and a device for producing metal, non-rotationally symmetric rings with a constant wall thickness along their circumference, particularly cam rings, starting from a hot-rolled pipe from which individual portions are severed, mec... | 08/30/2005 |
| 6896746 | Hot-rolled steel wire rods and bars usable for machine structural use without annealing and method for producing the same A steel wire rods and bars for machine structural use having, in the as-hot-rolled state, the same cold workability as a conventional steel wire rods and bars subjected to softening annealing after hot rolling, and a production method thereof are provided. This hot-... | 05/24/2005 |
| 6896747 | Austenitic alloy for heat strength with improved pouring and manufacturing, process for manufacturing billets and wire Austenitic alloy for high-temperature strength with improved pourability and manufacturing, of which the composition comprises, in weight-%: 0.010% | 05/24/2005 |
| 6866724 | Steel bar or wire rod for cold forging and method of producing the same A bar or wire product for use in cold forging, characterized in that it comprises a steel having the chemical composition, in mass %: C: 0.1 to 0.6%, Si: 0.01 to 0.5%, Mn: 0.2 to 1.7%, S: 0.001 to 0.15%, Al: 0.015 to 0.05%, N: 0.003 to 0.025%, P: 0.035% or less, O: ... | 03/15/2005 |
| 6835253 | Method for producing a hot strip The invention relates to a method for producing a hot strip, in particular for producing a hot strip intended for the production of a cold strip with good deep-drawing characteristics; in which a steel melt comprising (in % by weight) C:≦0.07%, Si:≦0.5%, Mn:≦2... | 12/28/2004 |
| 6823706 | Steel wire and method of manufacturing the same A steel wire, 0.10-0.40 mm in diameter, obtained by subjecting a high-carbon (0.70-0.90 wt. %) steel wire material to heat treatment and wire drawing, wherein its tensile strength and test values of special repeated torsional tests satisfy a predetermined relation; ... | 11/30/2004 |
| 6800147 | High-strength steel wire excelling in resistance to strain aging embrittlement and longitudinal cracking, and method for production thereof Disclosed herein is a high-strength high-carbon steel wire which, owing to its high strength as well as good ductility, is excellent in resistance to strain aging embrittlement and longitudinal cracking. The steel wire is characterized by having a chemical co... | 10/05/2004 |
| 6783609 | High-carbon steel wire rod with superior drawability and method for production thereof A high-carbon steel wire rod with superior drawability which has the chemical composition (in mass %) of C: 0.6-1.0%, Si: 0.1-1.5%, Mn: 0.3-0.9%, P: no more than 0.02%, S no more than 0.03%, N: no more than 0.005%, (optional Nb: 0.020-0.050% and V: 0.05-0.20%), with... | 08/31/2004 |
| 6780261 | Method of manufacturing an implantable stent having improved mechanical properties A metallurgical process for producing a metallic implantable medical device, such as a stent, in a condition wherein the metallic alloy of the device has improved mechanical properties. The starting material is formed into an oversized tube which is drawn to finishe... | 08/24/2004 |
| 6682612 | Method of heat treatment of wire A method of heat treatment of wire including cooling the wire stock immediately after the stock leaves the rolling heat region to a temperature below the starting temperature of martensite formation and, thereafter, forming wire coils.... | 01/27/2004 |
| 6645319 | Wire rod for drawing superior in twisting characteristics and method for production thereof A wire rod for drawing which is superior in drawability as well as twisting characteristics, and a method for producing the wire rod. The wire rod is characterized in that the raw material thereof is a eutectoid steel or hypereutectoid steel containing 0.... | 11/11/2003 |
| 6602359 | Bar or wire product for use in cold forging and method for producing the same The present invention provides a steel bar or wire rod for cold forging excellent in ductility after spheroidizing annealing and capable of preventing the occurrence of cracking in the steel material during cold forging, which cracking has so far been a p... | 08/05/2003 |
| 6596098 | Wire rod for high-fatigue-strength steel wire, steel wire and method of producing the same The present invention relates to a wire rod for high fatigue-strength steel wire of small diameter, and a wire rod used in steel wire obtained by twisting these together, a steel wire and a method of producing the same. The wire rod for steel wire and the... | 07/22/2003 |
| 6551419 | Hot-rolled steel wire and rod for machine structural use and a method for producing the same The present invention provides a hot rolled steel wire rod or bar for machine structural use having, in the as-hot-rolled condition, cold workability equal to that of the conventional wire rods or bars softened through annealing after hot rolling, and a m... | 04/22/2003 |
| 6547890 | Steel wire rod for cold forging and method for producing the same The present invention provides a steel wire rod for cold forging which can be spheroidizing-annealed in an as hot-rolled state without requiring preliminary drawing and can have high ductility after the spheroidizing annealing, and a method to produce the... | 04/15/2003 |
| 6527883 | Steel wire and method of manufacturing the same A steel wire of pearlite structure containing 0.8-1.0 mass % of C and 0.8-1.5 mass % of Si is disclosed. In the cross section of the steel wire the difference in average hardness between a region up to 100 μm from the surface thereof and a deeper region ... | 03/04/2003 |
| 6494973 | Method for producing fine wire In a method for producing fine wire, in particular, card wire, an optionally already treated wire blank is transformed by a heat treatment process into a drawable state, the wire blank is drawn to a drawn wire, and, subsequently, the drawn wire is subject... | 12/17/2002 |
| 6488787 | Cold workable steel bar or wire and process A machine structural steel bar or wire having a softening degree of at least that of the conventional spheroidization-annealed steel material, excellent hardenability, and improved cold workability, comprising 0.1 to 0.5 wt % of C, 0.01 to 0.15 wt % of Si, 0.2... | 12/03/2002 |
| 6475306 | Hot rolled steel wire rod or bar for machine structural use and method for producing the same The present invention provides a hot rolled steel wire rod or bar for machine structural use having, even when a spheroidizing annealing time is reduced, cold workability equal to that of the wire rods or bars treated through conventional spheroidizing an... | 11/05/2002 |
| 6471798 | Method and apparatus for heat treating steel A method for heat-treating steel, which method uses a coolant having a large coefficient of heat transfer and which method treats the steel at low cost and in an environment-friendly manner (no pollution), and an apparatus for the method. The heat-treatme... | 10/29/2002 |
| 6440579 | Process for producing a drawn wire made of stainless steel, in particular a wire for reinforcing tires, and wire obtained by the process Process for producing a drawn wire, in particular a wire for reinforcing tires, having a diameter of less than 0.3 mm by drawing a base wire rod having a diameter of greater than 5 mm or a predrawn base wire made of steel with the following composition by... | 08/27/2002 |
| 6395109 | Bar product, cylinder rods, hydraulic cylinders, and method for manufacturing A bar product prepared from microalloyed bar steel is provided. The bar product is prepared by hot rolling and heat treating a microalloyed bar steel. The hot rolled and heat treated microalloyed bar steel is prepared by steps of hot rolling a preform of ... | 05/28/2002 |
| 6374477 | Method for working input shaft for toroidal-type continuously variable transmission After heat treatment for hardening the outer peripheral surface of the input shaft 15 is enforced, a straightening operation for straightening the bent portions of the input shaft 15 caused by the heat treatment is carried out prior to formation of the th... | 04/23/2002 |
| 6372056 | Spring steel superior in workability A spring steel which is superior in both shaving properties and green drawing properties, which are important in spring production. A process for making the spring steel into wire rods for good springs. A rolled spring steel superior in workability charac... | 04/16/2002 |
| 6322641 | High-carbon steel wire superior in resistance to longitudinal cracking, steel product for the same, and process for production of the same Disclosed herein are a high-carbon steel wire having high strength and superior in resistance to longitudinal cracking, a steel for said high-carbons steel wire, and a process for producing said steel. The high-carbon steel wire is characterized in that t... | 11/27/2001 |
| 6291079 | Method for manufacturing self-hardening steel wire, reinforcing wire and application to a flexible duct The invention concerns a method for manufacturing steel wire comprising the following steps: manufacturing a reinforcing wire of sizeable length by rolling or hot wire drawing from steel containing the following elements: 0.18% to 0.45 % C, 0.4% to 1.8% M... | 09/18/2001 |
| 6264759 | Wire rods with superior drawability and manufacturing method therefor A method for manufacturing wire rods and steel wire for use in making bead wires, wire ropes and springs is disclosed. That is, high drawability wire rods and a manufacturing method therefor are disclosed, in which the wire drawing is possible without car... | 07/24/2001 |
| 6261388 | Cold forging steel having improved resistance to grain coarsening and delayed fracture and process for producing same A cold forging steel excellent in grain coarsening prevention and delayed fracture resistance and method of producing the same are provided that enable omission of a step of annealing or spheroidization annealing before cold forging and improvement of del... | 07/17/2001 |
