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| Number | Title | Issue Date |
| 8124008 | Free cutting steel A low carbon free cutting steel can be obtained by allowing the steel to contain 0.02 to 0.15 mass % of C, 0.05 to 1.8 mass % of Mn, 0.20 to 0.49 mass % of S, more than 0.01 mass % and not more than 0.03 mass % of O, 0.3 to 2.3% of Cr, and the balance consisting of ... | 02/28/2012 |
| 8052925 | Low carbon resulfurized free-machining steel having high machinability A low carbon resulfurized free-machining steel having a high machinability is provided. This steel comprises 0.02 to 0.15% by mass of C, up to 0.004% by mass (more than 0% by mass) of Si, 0.6 to 3% by mass of Mn, 0.02 to 0.2% by mass of P, 0.2 to 1% by mass of S, up... | 11/08/2011 |
| 7666350 | Low carbon composite free-cutting steel product excellent in roughness of finished surface and method for production thereof The present invention provides a low-carbon resulfurized free machining steel product excellent in machinability typified by finished surface roughness even though toxic Pb or special elements such as Bi or Te are not added, and a suitable production method thereof.... | 02/23/2010 |
| 7387691 | Hot forged non-heat treated steel for induction hardening A hot forged non-heat treated steel for induction hardening, comprising by mass percent, C: 0.35 to 0.45%, Si: 0.20 to 0.60%, Mn: 0.40 to 0.80%, S: 0.040 to 0.070%, Cr: 0.10 to 0.40%, Ti: 0.020 to 0.100%, Ca: 0.0005 to 0.0050%, B: 0.0005 to 0.0030%, O: 0.0015 to 0.0... | 06/17/2008 |
| 7357060 | Vehicle armor A vehicle is armored the steps of sequentially making a steel plate with a thickness of 4 mm to 15 mm of by weight | 04/15/2008 |
| 7338630 | Free-cutting steel and fuel injection system component using the same The present invention is to provide a free-cutting steel capable of suppressing production of coarse inclusions, and having a high fatigue strength and a desirable machinability. The free-cutting steel aimed at solving the foregoing problems consists essentially of,... | 03/04/2008 |
| 7254640 | System for providing fault tolerant data warehousing environment by temporary transmitting data to alternate data warehouse during an interval of primary data warehouse failure A method and system utilizing one or more data generating computing devices as default data warehouses in the event of a primary data warehouse failure are provided. A data warehouse provides an environment in which data from one or more data servers in one or more ... | 08/07/2007 |
| 7195736 | Lead-free steel for machine structural use with excellent machinability and low strength anisotropy A lead-free steel for machine structural use with excellent machinability and low strength anisotropy, which does not contain Pb and is equal to or higher than a conventional Pb-containing free cutting steel in properties, is provided. This steel includes, on the we... | 03/27/2007 |
| 7060350 | COMPOSITE MAGNETIC MATERIAL AND MAGNETIC MOLDING MATERIAL, MAGNETIC POWDER COMPRESSION MOLDING MATERIAL, AND MAGNETIC PAINT USING THE COMPOSITE MAGNETIC MATERIAL, COMPOSITE DIELECTRIC MATERIAL AND MOLDING MATERIAL, POWDER COMPRESSION MOLDING MATERIAL, PAINT, PREPREG, AND SUBSTRATE USING THE COMPOSITE DIELECTRIC MATERIAL, AND ELECTRONIC PART A composite magnetic material including a resin and generally spherical magnetic metal particles of at least one type dispersed in the resin and consisting essentially of single crystal grains, the metal particles having a mean particle size of 0.1 to 10 μm and eac... | 06/13/2006 |
| 7014812 | Sulfur-containing free-cutting steel for machine structural use A sulfur-containing free-cutting steel for machine structural use, containing, in weight percent, 0.10 to 0.55% of C, 0.05 to 1.00% of Si, 0.30 to 2.50% of Mn, not more than 0.15% of P, 0.050 to 0.350% of S, more than 0.010% but not more than 0.020% of Al, 0.015 to ... | 03/21/2006 |
| 6942741 | Iron alloy strip for voice coil motor magnetic circuits An iron alloy strip having a gage of 0.1 to 5 mm and a magnetic field strength variation within the strip of 0 to 10 Hz, made of an iron alloy consisting essentially of, in % by weight, 0.0001-0.02% of C, 0.0001-5% of Si, 0.001-0.2% of Mn, 0.0001-0.05% of P, 0.0001-... | 09/13/2005 |
| 6858101 | Steel excellent in forgeability and machinability The present invention is a steel, excellent in machinability, wherein forging workability is improved by suppressing the deterioration of mechanical properties in the direction in which the mechanical properties are the lowest, and more specifically, is a steel exce... | 02/22/2005 |
| 6838048 | Steel for machine structural use and method of producing same A steel for machine structural use which comprises, on the percent by mass basis, C: 0.1 to 0.6%, Si: 0.01 to 2.0%, Mn: 0.2 to 2.0%, S: 0.005 to 0.20%, P: not more than 0.1%, Ca: 0.0001 to 0.01%, N: 0.001 to 0.02% and Al: not more than 0.1%, with the balance being F... | 01/04/2005 |
| 6797231 | Steel for machine structural use The invention provides a steel for machine structural use, which is excellent in machinability, comprising, in percent by mass, C: 0.1-0.6%. Si: 0.01-2.0%, Mn: 0.2-2.0%, S: 0.005-0.2%, Al: not more than 0.009%, Ti: not less than 0.001% but less than 0.04%, Ca: 0.000... | 09/28/2004 |
| 6783728 | Free-cutting steel for machine structural use having good machinability in cutting by cemented carbide tool Disclosed is a free-cutting steel for machine structural use which always exhibits desired machinability, particularly, machinability by cutting with cemented carbide tools. This free-cutting steel is produced by preparing a molten alloy of the composition consistin... | 08/31/2004 |
| 6773661 | Free-cutting steel Disclosed is a free-cutting steel containing Ti- and/or Zr-carbosulfide as inclusion and having good machinability both in turning and drilling. The free-cutting steel consists essentially of, in mass %, C: 0.05-0.80%, Si: 0.01-2.5%, Mn: 0.1-3.5%, Ti+0.52Zr: 0.03-1.... | 08/10/2004 |
| 6743304 | Non-oriented electrical steel sheet with ultra-high magnetic flux density and production method thereof The present invention provides a non-oriented electrical steel sheet having ultra-high magnetic flux density and low core loss, characterized by: comprising a steel containing, in terms of wt %, Si: 0.4% or less, Ni: 2.0% to 6.0%, and Mn: 0.5% o... | 06/01/2004 |
| 6737019 | Sulfur-containing free-cutting steel A high-sulfur free-cutting steel which has a chemical composition containing, in mass %, 0.03 to 0.20% C, 0.35% or less Si (including 0%), 0.30 to 2.00% Mn, 0.01 to 0.15% P, 0.35 to 0.65% S 0.0100 to 0.0250% O, 0.020% or less N, 0.005% or less Al (including 0%), 0.0... | 05/18/2004 |
| 6667005 | Corrosion resistant steel Disclosed is a corrosion resistant steel having good machinability with sufficient corrosion resistance in the ordinary indoor circumstances and suitable for manufacturing shafts of various small motors and OA-machines. The steel comprises, by weight %, C... | 12/23/2003 |
| 6663726 | High-hardness prehardened steel for cold working with excellent machinability, die made of the same for cold working, and method of working the same There are provided a high-hardness prehardened steel for cold working having excellent machinability containing, by mass, not less than 0.3% but less than 0.5% C, 0.7 to 2.0% Si, and 0.08 to 0.25% S, a die for cold working which is fabricated by cutting t... | 12/16/2003 |
| 6649125 | Free-cutting steel Disclosed is a free-cutting steel which exhibits good machinability in turning and small roughness of the turned surfaces, and in which substantially no macro-streak-flaw occurs. The free-cutting steel contains, by weight %, C: 0.03-0.20%, Mn: 0.5-3.0%, P... | 11/18/2003 |
| 6635129 | Wire rod steel A wire rod steel superior in straightness, after being subjected to cold drawing. This wire rod steel comprises: Its ferrite grain size number of the wire rod steel is No. 11 or less according to ISO 643.... | 10/21/2003 |
| 6599469 | Non-heat treated steel for soft nitriding Disclosed is a non-heat treated steel for soft niriding, which can provide forged parts exhibiting equal to or larger than the limit strain at which cracks occur in straightening by bending and equal to or larger than the fatigue strength when compared wi... | 07/29/2003 |
| 6596227 | Machine structure steel superior in chip disposability and mechanical properties and its method of making A machine structure steel superior in chip disposability and mechanical properties which contains sulfide-type inclusions such that those particles of sulfide-type inclusions with major axes not shorter than 5 μm have an average aspect ratio not larger t... | 07/22/2003 |
| 6475305 | Machine structural steel product The present invention is directed to a steel product for machine structural use having excellent machinability and to a structural steel part for machinery manufactured from the steel product. More particularly, the invention is directed to a steel produc... | 11/05/2002 |
| 6299833 | Steel composition The application describes a steel composition consisting essentially of Carbon 0.50-0.70 weight % Silicon up to 0.40 weight % Manganese 0.55-1.00 weight % Phosphorus 0.030-0.070 weight % Sulphur 0.055 to 0.110 weight % Chromium up to 0.50 weight % Molybdenum up to 0.10 ... | 10/09/2001 |
| 6293988 | Inoculant and inoculant method for gray and ductile cast irons A new technique for producing ferrosilicon free inoculating agents for gray and ductile irons utilizing oxy-sulfide forming elements combined with sulfur and oxygen and 1) mechanically pressed into an insert or tablet for placement into foundry sand molds... | 09/25/2001 |
| 6287397 | High strength phosphorus-containing steel and method for producing the same A high strength phosphorus-containing steel having fine texture free from the problem of embrittlement by positively using the presence of P, which is a carbon steel having an average ferritic grain diameter of 3 μm or less and containing from 0.04 to 0.... | 09/11/2001 |
| 6210496 | High-strength high-workability cold rolled steel sheet having excellent impact resistance A cold rolled steel sheet having high strength and high formability and having excellent crushing performance can include 0.05-0.40 mass % of C, 1.0-3.0 mass % of Si, 0.6-3.0 mass % of Mn, 0.02-1.5 mass % of Cr, 0.010-0.20 mass % of P and 0.01-0.3 mass % ... | 04/03/2001 |
| 6200395 | Free-machining steels containing tin antimony and/or arsenic The invention relates to free-machining steels which do not rely on lead as a means of enhancing machinability. Instead, the steels of the invention employ concentrations of tin, arsenic, and/or antimony at ferrite grain boundaries to replicate a role of ... | 03/13/2001 |
| 6200527 | Carbon or low-alloy steel with improved machinability and process of manufacture of that steel A carbon or low-alloy steel is provided with improved machinability. The carbon content of the steel is less than 1.5% and the sum of the alloy elements contained therein is less than 9%. The steel contains oxide and sulfide inclusions, and the chemical c... | 03/13/2001 |
| 6162389 | High-strength and high-toughness non heat-treated steel having excellent machinability A non heat-treated steel of high strength, toughness and machinability which can be used in its as-worked state without calling for any special treatment after working. It contains less than 0.05 wt % C, 0.005 to 2.0 wt % Si, 0.5 to 5.0 wt % Mn, 0.1 to 10... | 12/19/2000 |
| 6143242 | Steel for machine structural use excellent in fracture splitability and fatigue strength A steel for machine structural use which realizes excellent fracture splitability and fatigue strength in its as-hot forged formed articles, and which comprises, based on weight, 0.2 to less than 0.35% of C, 0.1 to 1.1% of Si, 0.1 to less than 0.3% of Mn,... | 11/07/2000 |
| 5993571 | Steel for machine structural use and machine parts made from such steel A steel for machine structural use, essentially having the following chemical composition: C: 0.45-0.60 wt %, Si: 0.50-2.00 wt %, Mn: 0.10-0.30 (0.30 not inclusive) wt %, P: 0.01-0.10 wt %, S: 0.01-0.20 wt %, V: 0.08-0.15 wt %, and N: 0.0020-0.0050 (0.0050 not incl... | 11/30/1999 |
| 5961747 | Tin-bearing free-machining steel The invention relates to free-machining steels which do not rely on lead as a means of enhancing machinability. Instead, the steels of the invention employ concentrations of tin at ferrite grain boundaries to replicate a role of lead, which the inventors ... | 10/05/1999 |
| 5919577 | Fe-based alloy foil for liquid-phase diffusion bonding of Fe-based materials by enabling bonding in oxidizing atmospheres The present invention provides an Fe-based alloy foil for liquid phase diffusion bonding of Fe-based material by enabling bonding in oxidizing atmospheres at relatively high bonding temperatures to minimize thermal influence on the base material (the mate... | 07/06/1999 |
| 5882585 | Steel material with high thermal-resistance for producing engine piston upper parts A steel material is useful for producing the upper part of engine pistons with high wear, corrosion and heat resistance. This steel has the following composition (in % by weight): 1.20 to 150 Mn; 0.50 to 0.80 Si; 0.35 to 0.40 C; 0.10 to 0.50 Mo; 0.08 to 0... | 03/16/1999 |
| 5855845 | Low alloy steel for the manufacture of molds for plastics Steel for the manufacture of molds for injection molding of plastics, wherein its chemical composition contains, by weight: 0.35%ࣘCࣘ0.5%, 0%ࣘSiࣘ0.5%, 0.2%ࣘMnࣘ2.5%, 0%ࣘNiࣘ4%, 0%ࣘCrࣘ4%, 0%ࣘMo+W/2ࣘ2%, 0%ࣘCuࣘ1%, 0%ࣘV+Nb... | 01/05/1999 |
| 5769970 | Steel for the manufacture of separable mechanical components and separable mechanical component Steel useful for the manufacture of a separable mechanical component, whose chemical composition preferably comprises, by weight: 0.25%ࣘCࣘ0.75%, 0.2%ࣘSiࣘ1.5%, 0.1%ࣘMnࣘ2%, 0%ࣘNiࣘ1%, 0%ࣘCrࣘ1%, 0%ࣘMoࣘ1%, 0%ࣘCuࣘ1%, 0%ࣘVࣘ0.... | 06/23/1998 |
| 5753005 | Source powder for wear-resistant sintered material A source powder for a wear-resistant sintered material, consisting essentially of, in weight percentages, Cr: 3.0 to 6.0%, 2 Mo+W: 10.0 to 20.0%, V: 1.0 to 8.0%, Co: 10.0% or below, C: 0.20% to {0.01(2 Mo+W)+0.24 V}%, Si: 0.1 to 1.0%, Mn: 0.1 to 1.0% and ... | 05/19/1998 |
