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| Number | Title | Issue Date |
| 7361238 | Annealing furnace purging and oxidation system and method In an improved annealing furnace for laminations having a purge vestibule and an oxidation section, atmosphere injection tubes with atmosphere injection jets are provided in the oxidation section at a conveyor directly beneath trays conveying the laminations. Atmosp... | 04/22/2008 |
| 7288501 | Process and apparatus for the thermal treatment of pulverulent substances Process and apparatus for the thermal treatment of pulverulent substances, in which the pulverulent substance is dispersed in a carrier gas and is passed in a continuous manner through a heated reactor where it is thermally treated and is then quenched by a cooling ... | 10/30/2007 |
| 7276209 | Air-gas mixing systems and methods for endothermic gas generators Systems and methods create an air-gas mixture supply for an endothermic generator. The systems and methods convey a hydrocarbon gas under pressure through a valve, to thereby form an air-gas mixture supply for the endothermic generator. The systems and methods sense... | 10/02/2007 |
| 6966954 | Spall propagation properties of case-hardened M50 and M50NiL bearings A roller bearing that provides ball and roller bearing elements comprised of M50 steel and M50NiL steel having surface hardnesses above 60 HRC, and in the range of 65-72 HRC. The hardness in the surface region is achieved by nitriding the surface to achieve a high h... | 11/22/2005 |
| 6929825 | Method for aluminide coating of gas turbine engine blade A method for applying an aluminide coating on a gas turbine engine blade having an external surface and an internal cooling cavity having an internal surface that is connected to the external surface by cooling holes. The method is conducted in a vapor coating conta... | 08/16/2005 |
| 6749662 | Steel ballistic shot and production method A relatively high carbon, water-atomized, steel shot is softened via annealing to render it suitable for ballistic use. The annealing preferably includes decarburization from a surface layer or throughout and preferably provides the shot with a surface Knoop hardnes... | 06/15/2004 |
| 6635121 | Method and apparatus for controlling the decarburization of steel components in a furnace The invention relates to a method for controlling the decarburization of steel components in a furnace during heat treating processes. The concentration of CO2 and/or CO in the furnace is monitored in a first batch in order to determine periods... | 10/21/2003 |
| 6528178 | High temperature resistant article with improved protective coating bonding and method of manufacturing same A high temperature resistant article with improved protective coating bonding and method of manufacturing the article is provided. In one embodiment, the high temperature resistant article comprises a base body having a surface at least partly coated with... | 03/04/2003 |
| 6444053 | Preparation of a nickle-based superalloy article containing a reactive element and having a decarburized surface and coating A nickel-base superalloy article substrate has more nickel than any other element, a reactive element that is hafnium, zirconium, yttrium, lanthanum, or cerium, or combinations thereof, and a nominal bulk composition of carbon. A protective layer is depos... | 09/03/2002 |
| 6383306 | Preparation of a nickel-base superalloy article having a decarburized coating containing aluminum and a reactive element A nickel-base superalloy article substrate has more nickel than any other element and a nominal bulk composition of carbon. A protective layer is deposited overlying the surface of the article substrate. The protective layer includes aluminum and one or m... | 05/07/2002 |
| 6284388 | Steel with electrically insulating hematite layer The present invention is directed to a method of forming an electrically insulating layer on a steel article such as a stack of electrical steel laminations or an individual, unstacked electrical steel lamination, comprising exposing the article to an oxi... | 09/04/2001 |
| 6221501 | Steel with electrically insulating hematite layer The present invention is directed to a method of forming an electrically insulating layer on a steel article such as a stack of electrical steel laminations or an individual, unstacked electrical steel lamination, comprising exposing the article to an oxi... | 04/24/2001 |
| 6017641 | Coil spring resistive to delayed fracture and manufacturing method of the same A coil spring made of an oil-tempered steel wire with internal hardness of more than Hv 550 in cross-section, the surface hardness of the oil-tempered steel wire being determined in an extent between Hv 420 in a minimum value and hardness defined by subtr... | 01/25/2000 |
| 5846349 | Low alloy steel powder for plasma deposition having solid lubricant properties An iron or copper based metal powder useful for plasma deposition of a coating that has a dry coefficient of friction 0.75 or less and readily conducts heat through the coating. The powder comprises (a) H2 O atomized and annealed particles cons... | 12/08/1998 |
| 5785774 | Process for producing heat treatment atmospheres An endogenerator is provided in which CO and H2 are generated as primary products of hydrocarbon oxidation. Noble metal catalysts such as platinum (Pt) and particularly rhodium (Rh), are loaded on a porous ceramic support, of example, an alumin... | 07/28/1998 |
| 5735970 | Apparatus and process for the production of a neutral atmosphere The process and system according to the present invention are used for the production of an atmosphere. The process involves feeding an impure nitrogen stream, combined with a hydrocarbon to a catalytic reactor having a non-noble metal catalyst to produce... | 04/07/1998 |
| 5628837 | Surface decarburization of a drill bit having a refined primary cutting edge A cutting tool is decarburized by placing the tool in a protective environment, heating in this environment to a temperature of 600°-1100° C., and maintaining this temperature for a period of 15-120 minutes. The cutting tool may be a cemented carbide mi... | 05/13/1997 |
| 5605580 | Carburization process In plasma carburization of the workpiece such as gears, etc., the present invention intends to make the carbon concentration of the carburized layer to be uniform at the edge portion and at the flat portion and also suppress generation of mesh-form carbid... | 02/25/1997 |
| 5554230 | Low dew point gas generator cooling system A drying system is disclosed for drying wet gases, typically produced by a gas generator to dew points less than 32° F. The system uses a refrigeration cycle having a single compressor to dry the wet gas in a first evaporator while simultaneously defrost... | 09/10/1996 |
| 5441581 | Process and apparatus for producing heat treatment atmospheres An endogenerator is provided in which CO and H2 are generated as primary products of hydrocarbon oxidation. Noble metal catalysts such as platinum (Pt) and particularly rhodium (Rh), are loaded on a porous ceramic support, of example, an alumin... | 08/15/1995 |
| 5417774 | Heat treating atmospheres A process for producing low-cost atmospheres suitable for annealing, brazing, and sintering ferrous and non-ferrous metals and alloys, neutral hardening low, medium, and high carbon steels, sintering ceramic powders, and sealing glass to metal from non-cr... | 05/23/1995 |
| 5401339 | Atmospheres for decarburize annealing steels A process for producing low-cost atmospheres suitable for decarburize annealing carbon steels from non-cryogenically generated nitrogen containing up to 1.54 residual oxygen by catalytically deoxygenating a non-cryogenically generated nitrogen stream at l... | 03/28/1995 |
| 5395461 | Method of producing titanium material resistant to hydrogen absorption in aqueous hydrogen sulfide solution A method of producing a titanium material having enhanced resistance to hydrogen absorption in aqueous hydrogen sulfide solutions which comprises removing a layer of at least 0.5 μm depth from the surface of a titanium material that has been annealed aft... | 03/07/1995 |
| 5348593 | Method of heat treating gold or gold alloy parts A process for generating in-situ low cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace... | 09/20/1994 |
| 5348592 | Method of producing nitrogen-hydrogen atmospheres for metals processing An improved method for producing substantially moisture- and oxygen-free, nitrogen-hydrogen atmospheres suitable for annealing, hardening, brazing, and sintering ferrous and non-ferrous metals and alloys is disclosed. According to the disclosed method, su... | 09/20/1994 |
| 5342455 | In-situ generation of heat treating atmospheres using a mixture of non-cryogenically produced nitrogen and a hydrocarbon gas A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace from non-cry... | 08/30/1994 |
| 5340412 | Method of fluorinated nitriding of austenitic stainless steel screw An austenitic stainless steel screw having a nitride hard layer on its surface to prevent corrosion on parts of the screw such as a screw head which is in contact with the environment by removing a portion of the nitride hard layer to expose austenitic st... | 08/23/1994 |
| 5302213 | Heat treating atmospheres from non-cryogenically generated nitrogen An improved process for producing nitrogen-based atmospheres suitable for annealing ferrous metals and alloys, brazing metals, sintering metal and ceramic powders, and sealing glass to metals from non-cryogenically generated nitrogen is presented. These a... | 04/12/1994 |
| 5298089 | In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace... | 03/29/1994 |
| 5298090 | Atmospheres for heat treating non-ferrous metals and alloys A process for producing low-cost atmospheres suitable for annealing, brazing, and sintering non-ferrous metals and alloys from non-cryogenically produced nitrogen containing up to 5%, residual oxygen is disclosed. According to the process, suitable atmosp... | 03/29/1994 |
| 5284526 | Integrated process for producing atmospheres suitable for heat treating from non-cryogenically generated nitrogen An integrated two-step process for producing low-cost atmospheres suitable for annealing ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in continuous furnaces from non-cryogenica... | 02/08/1994 |
| 5259893 | In-situ generation of heat treating atmospheres using a mixture of non-cryogenically produced nitrogen and a hydrocarbon gas A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace from non-cry... | 11/09/1993 |
| 5254180 | Annealing of carbon steels in a pre-heated mixed ambients of nitrogen, oxygen, moisture and reducing gas An improved process for producing high-moisture containing nitrogen-based atmospheres suitable for oxide and decarburize annealing of carbon steels from non-cryogenically generated nitrogen is presented. These nitrogen-based atmospheres are produced by 1)... | 10/19/1993 |
| 5221369 | In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering metal and ceramic powders in a continuous furnace... | 06/22/1993 |
| 5207839 | Processes for the production of a controlled atmosphere for heat treatment of metals Substantially all residual oxidizing gas in a treating atmosphere which is inert or reducing, is eliminated by injecting into the atmosphere a gaseous silicon hydride at a temperature between 50 and 1,600° C. and in amount such that the ratio R of the co... | 05/04/1993 |
| 5123957 | Method for manufacturing low carbon ferrochrome with high chromium content A method for manufacturing a low carbon ferrochrome with a high chromium content of at least 70 weight % Cr comprising the steps of at least once nitriding and crushing a low carbon ferrochrome to form a crushed ferrochrome nitride and subjecting the crus... | 06/23/1992 |
| 5032191 | Methods and devices for obtaining a homogeneous austenite structure A method and device for thermally treating at least one carbon steel wire such a way as to obtain a homogenous austenite structure, characterized by the fact that the wire is heated in a tube containing a gas which has practically no forced ventilation, ... | 07/16/1991 |
| 4992113 | Process for heat treatment under a gaseous atmosphere containing nitrogen and hydrocarbon Process for the heat treatment of low-alloy steels at temperatures higher than 600° C., such as annealing or heating before hardening, etc., said treatment being carried out in a protection atmosphere produced by the injection of nitrogen, hydrocarbon C | 02/12/1991 |
| 4979997 | Process for producing grain-oriented electrical steel sheet having superior magnetic and surface film characteristics A process for producing a grain-oriented steel sheet having superior magnetic and surface film characteristics, which comprises the steps of: heating to a temperature of 1200° C. or lower an electrical steel slab comprising 0.025 to 0.075 wt % C, 2.5 to ... | 12/25/1990 |
| 4509993 | Regeneration agent for carburization salt bath It is known to regenerate salt baths for nitriding parts of iron and steel with polymers of organic materials, which polymers, however, could not be used in carburizing salt baths since with them there only are formed slight amounts of carburizing active ... | 04/09/1985 |
