Class 148/543 - Containing at least 1.5 percent carbon

Subclass of Class 148 - Metal treatment
Definition: Process wherein the iron alloy contains at least 1.5 percent
No. of patents: 33
Last issue date: 07/21/2009

Number	Title	Issue Date
7563333	Process for producing steel article The invention concerns an article of a steel which is characterized in that it consists of an alloy which contains in weight-%: 1.2-2.0 C, 0.1-1.5 Si, 0.1-2.0 Mn, max. 0.2 N, max. 0.25 S, 4-8 Cr, 0.5-3.5 (Mo+W/2), 5-8 V, max. 1.0 Nb, balance essentially only iron an...	07/21/2009
7534314	High carbon steel with superplasticity A density reducing high carbon containing or UHC-steel and particular a superplastic steel, which besides iron and impurities conventionally accompanying steel, contains the following alloy components in wt. %: 0.8 to 2.5% C 3.5 to 15% Al	05/19/2009
7160398	Method of making rapidly solidified alloy for magnet A melt of an alloy, represented (Fe1-mTm)100-x-y-zQxRyMz, where T is Co and/or Ni, Q is B and/or C, R is at least one rare-earth element, M is selected from Al, Si, Ti, V, Cr, Mn, Cu, Zn, Ga, Zr, Nb, ...	01/09/2007
7070666	Machinable austempered cast iron article having improved machinability, fatigue performance, and resistance to environmental cracking and a method of making the same A machinable austempered cast iron article has improved strength, machinability, fatigue performance, and resistance to environmental cracking. A method of making the machinable austempered cast iron article includes austenitizing an iron composition having a substa...	07/04/2006
6918973	Alloy and method of producing the same In accordance with a preferred embodiment of the invention, an alloy or other composite material is provided formed of a bulk metallic glass matrix with a microstructure of crystalline metal particles. The alloy preferably has a composition of (XaNib...	07/19/2005
6764560	Method of forming cast alloys having high strength and plasticity The present invention provides cast high-carbon steel having high strength and plasticity and a method for its formation. In the method, forming during cooling from the melting point through temperature control results in a structure having small size cementite grai...	07/20/2004
6746550	Compacted graphite cast iron alloy and its method of making A process for producing a compacted graphite iron (CGI) article, comprising the steps of: (a) providing a CGI base iron having a composition comprising, in weight percentages, about 3.2 to 3.8 total C, 2.8 to 4.0 Si and the balance at least Fe and incidental impurit...	06/08/2004
6702905	Corrosion and wear resistant alloy An iron-based corrosion resistant and wear resistant alloy. The alloy can comprise (in weight percent) 0.005-0.5% boron, 1.2-1.8% carbon, 0.7-1.5% vanadium, 7-11% chromium, 1-3.5% niobium, 6-11% molybdenum, and the balance including iron and incidental im...	03/09/2004
6544359	Method to produce compacted graphite iron (CGI) The invention relates to a method of producing objects of cast iron containing compacted (vermicular) graphite crystals, by preparing a cast iron melt having substantially a carbon content at the desired final level and a silicon content below the desired...	04/08/2003
6537395	Process for producing gray cast iron for use in high speed machining with cubic boron nitride and silicon nitride tools Processes for producing gray cast iron and the resulting gray cast iron exhibiting consistently good surface finish with prolonged tool life during finish machining with cubic boron nitride and silicon nitride cutting tools at high cutting speeds and low ...	03/25/2003
6527878	Thixocast casting material, process for preparing thixocasting semi-molten casting material, thixocast process, fe-based cast product, and process for thermally treating fe-based cast product A thixocast casting material is formed of an Fe--C--Si based alloy in which an angle endothermic section due to the melting of a eutectic crystal exists in a latent heat distribution curve and has a eutectic crystal amount Ec in a range of 10% by weight	03/04/2003
6332938	Process for producing Fe-based member having high young's modulus and high toughness The present invention produces an Fe-based member having a high Young's modulus and a high toughness. In producing an Fe-based member, a first step and a second step are sequentially carried out. At the first step, an Fe-based material comprising 1.5% by ...	12/25/2001
6199618	Method of producing castings In order to produce castings from cast iron with foliated graphite, the carbon content of the cast iron can be set at between approximately 3 and 4% by controlling the melting process of the type and/or operation of the melting furnace. The molten mass is...	03/13/2001
6136101	Casting material for thixocasting, method for preparing partially solidified casting material for thixocasting, thixo-casting method, iron-base cast, and method for heat-treating iron-base cast A thixocast casting material is formed of an Fe--C--Si based alloy in which an angle endothermic section due to the melting of a eutectic crystal exists in a latent heat distribution curve and has a eutectic crystal amount Ec in a range of 10% by weight	10/24/2000
6110305	Method for production of high-strength low-expansion cast iron A method is proposed for the production of high-strength low-expansion cast iron enabled to acquire improved strength, hardness, and cutting workability while retaining the property of low expansion intact. The product is a low-expansion cast iron having ...	08/29/2000
6033791	Wear resistant, high impact, iron alloy member and method of making the same A wear resistant, high-impact iron alloy member (20,22) suitable for use in an impact rock crusher and a method of making the same. The invention provides a white iron alloy member (20,22) having at least one wear surface (24) with carbide granules encaps...	03/07/2000
5976277	High speed tool steel, and manufacturing method therefor A high speed tool steel and a manufacturing method therefor are disclosed, in which carbides are formed in the matrix in a uniform manner, thereby obtaining a high toughness and a high abrasion resistance. The high speed tool steel according to the presen...	11/02/1999
5738737	Process for making superplastic steel powder and flakes In a process for making superplastic steel powder or flakes, molten steel is rapidly solidified to form a solidified material comprising substantially single-phase austenitic steel powder or flakes having a grain size of no greater than about 2 μm. The p...	04/14/1998
5720830	Engineering ferrous metals and method of making thereof A method of making an engineering ferrous metal comprising the steps of adding to liquid engineering ferrous metal solid alloy carbide particles and thereafter permitting the ferrous metal to solidify. The alloy carbide particles are coated with iron or a...	02/24/1998
5580401	Gray cast iron system for scroll machines A system for making a gray cast iron scrolls using a high performance inoculant....	12/03/1996
5346561	Spheroidal graphite cast iron member having improved mechanical strength hand method of producing same The spheroidal graphite cast iron member having a surface layer portion mostly composed of a ferrite phase and having a thickness of at least 1 mm, and an inner portion composed of a pearlite phase and a ferrite phase, the surface layer portion having a f...	09/13/1994
5288342	Solid metal-carbon matrix of metallofullerites and method of forming same A metallic solid comprising an metal-carbon matrix of an allotropic metal and metallofullerites of the allotropic metal is disclosed, along with an associated method of forming the solid by interrupting and temporarily holding a metal-carbon melt at the p...	02/22/1994
5225007	Method for wear-resistant compound roll manufacture The wear-resistant compound roll is constituted by a shell portion made of an iron-base alloy having the composition consisting essentially of 1.0-3.5 weight % of C, 3.0 weight % or less of Si, 1.5 weight % or less of Mn, 2-10 weight % of Cr, 9 weight % o...	07/06/1993
5185044	Method of making "Damascus" blades A method of making a steel article having a "Damascus" surface pattern wherein a steel melt comprising about 1.0 to about 2.0 weight % carbon is solidified to form an ingot, the ingot is heated between about 1100° to about 1299° C. for a time at tempera...	02/09/1993
5122197	Method of producing cast-iron product A cast-iron product has a composition of 4.3-4.9 wt. % Carbon Equivalent (CE), 0.25-0.5 wt. % Chromium (Cr), 0.05-0.12 wt. % Tin (Sn), 0.4-1.2 wt. % Manganese (Mn), 0-0.1 wt. % Phosphorus (P), and 0-0.15 wt. % Sulfur (S), with the balance being Iron (Fe)....	06/16/1992
4990194	Thin high-strength article of spheroidal graphite cast iron and method of producing same A thin high-strength article of spheroidal graphite cast iron having graphite particles dispersed in a ferrite matrix containing 10% or less of pearlite, characterized in that there are substantially no fine gaps between the graphite particles and the fer...	02/05/1991
4961791	Pig iron for the manufacture of brake bodies A pig iron for the manufacture of brake bodies, specially ventilated brake discs, which poured in cast-iron molds has a tensile strength of at least 250 N/mm2 and consisting essentially of: carbon in an amount 3.65 to 3.75 weight %; manganese in an ...	10/09/1990
4889687	Nodular cast iron having a high impact strength and process of treating the same Nodular cast iron having favorable mechanical properties, in particular a high impact strength at low temperatures, comprising: from 3.0 to 4.0% of carbon; from 1.5 to 2.3% of silicon; less than 0.3% of manganese; not more than 0.03% of phosphorus; less t...	12/26/1989
4800949	Method and installation for the continuous manufacture of pipes from spheroidal graphite cast-iron having a controlled structure The invention concerns a method and apparatus for thermally treating cast-iron pipes formed in a continuous casting die. The pipe or tube undergoes tempering by passing through a vat which is located downstream from the continuous casting die. The vat con...	01/31/1989
4666533	Hardenable cast iron and the method of making cast iron A method is disclosed for forming a surface hardenable cast iron article by development of metastable retained austenite in the cell boundary of a ductile or semiductile cast iron. The method comprises (a) controlling the solidification of a cast iron mel...	05/19/1987
4512804	Work-hardenable austenitic manganese steel and method for the production thereof A work-hardenable austenitic manganese steel has a base composition (each in percent by weight) of 0.7 to 1.7 carbon, 5.0 to 18.0 manganese, 0 to 3.0 chromium, 0 to 4.0 nickel, 0 to 2.5 molybdenum, 0.1 to 0.9 silicon, up to 0.1 phosphorus and contains mic...	04/23/1985
4475956	Method of making high strength ferritic ductile iron parts A method of strengthening ferritic ductile iron castings while maintaining ductility at a high level is disclosed. An iron alloy melt is cast consisting essentially of by weight 3.9-6.0% Si, 3.0-3.5% C, 0.1-0.3% Mn, 0-0.35% Mo, at least 1.25% Ni, no great...	10/09/1984
4000011	Method of surface hardening A method of surface hardening for forming a hardened layer of cemented carbide, including cementite, on a local surface area of cast iron by rapidly melting the local surface by means of a rapid melting process such as the electron bombardment melting pro...	12/28/1976

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Class 148/543 - Containing at least 1.5 percent carbon