Patents by Inventor Horst Gravemann
Horst Gravemann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6565681Abstract: A method for manufacturing casting molds, in particular continuous casting molds which are used with an electromagnetic rabbling mechanism in the continuous casting of steel, is provided. The method comprises selecting a specified age-hardenable copper alloy to have a Ni content from 0.1 to 2.0% which allows the electrical conductivity of the copper alloy to be adjusted from 80 to 35 IACS. The method further comprises melting, casting, hot-rolling, solution heat treating and rapidly cooling the copper alloy, followed by age-hardening, wherein the mold has a tensile strength of at least 430 N/mm2, is highly thermally conductive and exhibits low magnetic field damping. A method of using an age-hardenable copper alloy is also provided.Type: GrantFiled: July 28, 1997Date of Patent: May 20, 2003Assignee: KM-Kabelmetal AktiengesellschaftInventors: Horst Gravemann, Dirk Rode
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Patent number: 6083328Abstract: A hardenable copper alloy, suitable as a material for manufacturing casting rolls and casting wheels that are subjected to changing temperature stresses, is disclosed. The hardenable copper alloy comprises 1.0 to 2.6% nickel, 0.1 to 0.45% beryllium, and the remainder of copper, inclusive of impurities resulting from manufacturing and the customary processing additives, and has a Brinell hardness of at least 200 and an electric conductivity of over 38 m/.OMEGA. mm.sup.2.Type: GrantFiled: May 6, 1994Date of Patent: July 4, 2000Assignee: KM Europa Metal AGInventors: Horst Gravemann, Thomas Helmenkamp
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Patent number: 5553660Abstract: To continuously cast thin slabs or round ingots from copper alloys, which slabs or ingots have a thickness of 8 to 40 mm, the present method electromagnetically agitates the melt found inside the ingot mold. By properly dimensioning the agitator coil, the agitation power inside the melt is limited to within a range of about 0.5 to 100 W/cm3, while the pull-off rate of the casting strand is limited to within a range of 0.05 to 1.3 m/min. The copper alloys contain up to a maximum of 1% of one element selected from the group consisting of iron, cobalt, manganese, zinc, zirconium, chromium, molybdenum and niobium.Type: GrantFiled: November 28, 1994Date of Patent: September 10, 1996Assignee: KM-Kabelmetal AktiengesellschaftInventors: Andreas Krause, Horst Gravemann
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Patent number: 5407499Abstract: A tubular blank made of an age-hardening copper alloy is annealed and quenched; whereupon a mandrel of the final shape and size of the interior cavity of the mold to be made is inserted; whereupon the blank is forced onto the mandrel primarily by drawing, but also rolling, forging, electrodynamically or hydrostatically shaping, or a combination thereof is considered.Type: GrantFiled: April 14, 1993Date of Patent: April 18, 1995Assignee: KM Kabelmetal A.G.Inventor: Horst Gravemann
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Patent number: 5265666Abstract: To continuously cast thin slabs or round ingots from copper alloys, which slabs or ingots have a diameter of 8 to 40 mm, the present method electromagnetically agitates the melt found inside the ingot mold. By properly dimensioning the agitator coil, the agitation power inside the melt is limited to within a range of about 0.5 to 100 W/cm3, while the pull-off rate of the casting strand is limited to within a range of 0.05 to 1.3 m/min.Type: GrantFiled: February 10, 1992Date of Patent: November 30, 1993Assignee: KM-Kabelmeteal AktiengesellschaftInventors: Andreas Krause, Horst Gravemann
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Patent number: 5074921Abstract: Method of making a copper alloy to be used as a mold for continuous casting and comprising from 0.05% to 0.4% zinc; from 0.02% to 0.3% magnesium; from 0.02% to 0.2% phosphorus; all percentages by weight; the remainder being copper, and inevitable impurities; the alloy is cast and hot worked possibly followed by quenching and cold working with at least 10% deformation; the alloy is then annealed from 1 to 6 hours at a temperature from 300.degree. to 550.degree. centigrade; and finally cold worked with at least 10% deformation.Type: GrantFiled: October 12, 1990Date of Patent: December 24, 1991Assignee: Kabel und MetallwerkeInventor: Horst Gravemann
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Patent number: 5069270Abstract: Continuous casting is improved by providing a continuous casting mold of copper alloy, said copper alloy including from 1.6 to 2.4% nickel, from 0.5 to 0.8% silicon, from 0.01 to 0.2% zirconium possibly including up to 0.4% chromium and/or up to 0.2% iron, the remainder copper as well as inevitable manufacturing impurities and usual working additives preferably the zirconium amount is smaller than the upper stated limit and the alloy includes in addition up to 0.1% of at least one of the following cerium, hafnium, niobium, titanium and vanadium.Type: GrantFiled: June 14, 1989Date of Patent: December 3, 1991Assignee: KM-Kabel Metall AGInventor: Horst Gravemann
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Patent number: 4883112Abstract: Continuous casting uses a mold made of copper allow which includes from 0.01% to 0.15% boron, 0.01 to 0.2% magnesium, the remainder being copper as well as manufacture-dependent inpurities and working additives; in addition, at least one additive from the group is used at stated percentages: from 0 to 0.05% silicon, from 0 to 0.5% Ni, from 0 to 0.03% iron, from 0 to 0.03% titanium, from 0 to 0.2% zirconium, from 0 to 0.04% phosphorus, at a total content not exceeding 0.6%, all percentages by weight; the silicon content should be from 0.02% to 0.04%, and the nickel content should be from 0.1 to 0.5%. The mold is made in several working and annealing steps, the last step should be a cold working step with at least 10% deformation.Type: GrantFiled: August 5, 1988Date of Patent: November 28, 1989Assignee: Kabel-und Metallwerke G. AGInventor: Horst Gravemann
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Patent number: 4787228Abstract: A round copper or copper-alloy tube is internally coated with a relatively thick nickel or nickel-alloy layer and formed into a tube of rectangular or square-shaped cross section; the tube or cut-off sections thereof will serve as molds for continuous casting.Type: GrantFiled: May 12, 1983Date of Patent: November 29, 1988Assignee: Kabel-und Metallwerke Gutehoffnungshuette AGInventors: Eike Weisner, Horst Gravemann
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Patent number: 4702299Abstract: A mold for continuous casting has indents, grooves, or recesses in the mold wall itself and/or along one or more edges thereof; wear-proof inserts are fitted into these grooves or indents and fastened thereto by means of electron beam welding along exposed joint lines between the inserts as inserted and border edges of the indents or recesses. The inserts are affixed in this manner along edges for engagement with other mold walls, and/or along the lower edge and/or a level which is expected to coincide with the surface level of the molten steel in the mold.Type: GrantFiled: November 1, 1985Date of Patent: October 27, 1987Assignee: Kabel-und Metallwerke Gutehoffnungshuette AGInventor: Horst Gravemann
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Patent number: 4421570Abstract: An age-hardening copper alloy is used, alloy components being zirconium, nickel, chromium, cobalt, phosphorus, and beryllium, to make a tubular blank and solution heat-treating same; after a cold-working step, the pre-sized blank is age-hardened at from 400.degree. C. to 600.degree. C. for at least 15 minutes and explosion-formed in order to obtain the desired size, shape, and dimensions.Type: GrantFiled: March 12, 1982Date of Patent: December 20, 1983Assignee: Kabel und Metallwerke Gutehoffnungshutte AGInventor: Horst Gravemann
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Patent number: 4197902Abstract: A metal mold employed for the casting of metals, preferably steel, has a wear resistant layer on the casting surface thereof formed of a different metal having solid particles dispersed therein. A preferred mold is formed of copper or alloy thereof having an electrolytically deposited nickel layer with silicon carbide particles dispersed therein.Type: GrantFiled: July 28, 1977Date of Patent: April 15, 1980Assignee: Kabel-und Metallwerke Gutehoffnungshuette AGInventors: Wolfgang Von Jan, Horst Gravemann