Patent application number | Description | Published |
20120080158 | UNIDIRECTIONAL SOLIDIFICATION PROCESS AND APPARATUS THEREFOR - An apparatus and method for casting an alloy using a unidirectional casting technique. The apparatus includes a mold adapted to contain a molten quantity of an alloy, a primary heating zone adapted to heat the mold and the molten alloy therein to a temperature above the liquidus temperature of the alloy, a cooling zone adapted to cool the mold and molten alloy therein to a temperature below the solidus temperature of the alloy and thereby yield the unidirectionally-solidified casting, and an insulation zone between the primary heating zone and the cooling zone. The apparatus also has a secondary heating zone separated from the insulation zone by the primary heating zone. The secondary heating zone maintains the mold and the molten alloy therein at a temperature below the liquidus temperature of the alloy. The temperatures within the primary and secondary heating zones are individually set and controlled. | 04-05-2012 |
20120152483 | UNIDIRECTIONAL SOLIDIFICATION PROCESS AND APPARATUS AND SINGLE-CRYSTAL SEED THEREFOR - A single-crystal seed, apparatus and process for producing a casting having a single-crystal (SX) microstructure. The seed has a geometry that includes a vertex capable of destabilizing an oxide film that forms at the interface between the seed and a molten metal during the casting process, and thereby promotes a continuous single-crystal grain growth and reduces grain misorientation defects that can initiate from the seed/metal interface. | 06-21-2012 |
20130206352 | UNIDIRECTIONAL SOLIDIFICATION PROCESS AND APPARATUS AND SINGLE-CRYSTAL SEED THEREFOR - A single-crystal seed, apparatus and process for producing a casting having a single-crystal (SX) microstructure. The seed has a geometry that includes a vertex capable of destabilizing an oxide film that forms at the interface between the seed and a molten metal during the casting process, and thereby promotes a continuous single-crystal grain growth and reduces grain misorientation defects that can initiate from the seed/metal interface. | 08-15-2013 |
20140042128 | ELECTRIC DISCHARGE MACHINING PROCESS, ARTICLE FOR ELECTRIC DISCHARGE MACHINING, AND ELECTRIC DISCHARGE COOLANT - An electric discharge machining process, an article for electric discharge machining, and an electrically-conductive electric discharge machining coolant are disclosed. The electric discharge machining process includes electric discharge machining a target region of a component. The article includes a non-electrically-conductive layer, an electrically-conductive layer, and a target region on the non-electrically-conductive layer. The electrically-conductive electric discharge machining coolant includes a hydrocarbon liquid and carbon powder suspended within the hydrocarbon liquid. | 02-13-2014 |
20140199164 | NICKEL-BASED ALLOY AND TURBINE COMPONENT HAVING NICKEL-BASED ALLOY - A nickel-based alloy and a turbine component are disclosed. The alloy includes, by weight, between about 0.8% and about 1.3% hafnium, between about 5.7% and about 6.4% aluminum, between about 7.0% and about 10.0% cobalt, up to about 0.1% carbon, up to about 8.7% chromium, up to about 0.6% molybdenum, up to about 9.7% tungsten, up to about 0.9% titanium, up to about 0.02% boron, up to about 0.1% manganese, up to about 0.06% silicon, up to about 0.01% phosphorus, up to about 0.004% sulfur, up to about 0.02% zirconium, up to about 1.8% niobium, up to about 0.1% vanadium, up to about 0.1% copper, up to about 0.2% iron, up to about 0.003% magnesium, up to about 0.002% oxygen, up to about 0.002% nitrogen, and a balance nickel. The turbine component is a turbine bucket, a turbine nozzle, or any other suitable turbine component including the alloy. | 07-17-2014 |
20140205490 | NICKEL-BASED ALLOY AND TURBINE COMPONENT HAVING NICKEL-BASED ALLOY - A nickel-based alloy and a turbine component including a nickel-based alloy are disclosed. The nickel-based alloy includes, by weight, between about 8% and about 11% cobalt, up to about 3% niobium, up to about 3% titanium, up to about 2.3% aluminum, up to about 3% tungsten, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel, or the nickel-based alloy includes, by weight, between about 1% and about 3% niobium, between about 1% and about 3% titanium, between about 2.1% and about 2.5% aluminum, up to about 3% tungsten, up to about 11% cobalt, up to about 25% chromium, up to about 0.1% carbon, up to about 0.01% boron, and a balance nickel. The turbine component includes the nickel-based alloy. | 07-24-2014 |
20140332175 | COMPOSITE GEOMETRICAL DESIGN FOR A GRAIN STARTER IN A BRIDGMAN INVESTMENT CASTING PROCESS - A grain starter for use in solidification of molten metallic material forming an article having a directional grain structure and a method for solidifying an article having a directional grain structure with a substantial absence of stray grains. The grain starter comprises a grain-starting material that initiates grain growth in the molten metallic material in a preselected crystallographic direction. The grain-starting material has a melting temperature higher than the metallic material forming the article lest the grain starter be modified by contact with the molten material. The grain starter further includes a feature that modifies heat transfer characteristics of the metallic material in contact with it in order to produce an article having grains oriented in the preselected crystallographic orientation and modifies the profile of the advancing solidification front. The article is substantially free of stray grains not oriented in the preselected crystallographic direction. | 11-13-2014 |
20150217412 | WELD FILLER FOR NICKEL-BASE SUPERALLOYS - A weld repair for repairing an imperfection in a nickel base superalloy article. The weld repair provides a weldment that includes a weld joint, a heat affected zone adjacent to the weld joint and a nickel base alloy base material adjacent to the heat affected zone and opposite the weld joint. The weld joint utilizes a nickel base weld filler material, having a composition, in weight percent of 0.03-0.13% C, 22.0-23.0% Cr, 18.5-19.5% Co, 1.8-2.2% W, 0.7-1.4% Nb, 2.2-2.4% Ti, 1.3-2.0% Al, 0.005-0.040% Zr, 0.002-0.008% B, up to 0.15% Mo, up to 0.35% Fe, up to 0.10% Mn, up to 0.10% Cu, up to 0.10% V, up to 0.15% Hf, up to 0.25% Si, and the balance Ni and incidental impurities. The weld filler material is characterized by an absence of Ta. | 08-06-2015 |