| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148218000 |
Combined carburizing and nitriding (e.g., carbonitriding, nitrocarburizing, etc.)
| 52 |
| 148225000 |
Iron(Fe) or iron base alloy
| 52 |
| 148208000 |
With decarburizing or denitriding
| 19 |
| 148210000 |
Of selected surface area (e.g., zone, top only, etc.)
| 17 |
| 148217000 |
With noncarburizing or non-nitriding reactive coating (e.g., oxidizing, siliconizing, boronizing, etc.)
| 14 |
| 148222000 |
Utilizing ionized gas (e.g., plasma, etc.) or electron arc or beam
| 13 |
| 148223000 |
Including use of vacuum
| 13 |
| 148215000 |
Measuring, sensing, or testing
| 8 |
| 148237000 |
Refractory metal (i.e., Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W) or refractory base alloy
| 6 |
| 148238000 |
Nitriding
| 6 |
| 148207000 |
Carburizing or nitriding uniformly throughout the entire mass (i.e., internal carburizing) | 4 |
| 20090218011 | METHOD FOR MANUFACTURING A STAINLESS STEEL PRODUCT - The invention relates to a method for making a thin finished product to be formed by deformation that combines strength with resistance to a highly corrosive environment. The method comprises forming a sheet of stainless steel with a microstructure consisting predominantly of ferrite, austenite, martensite or a mixture thereof, with a thickness of less than 3 mm, to a three dimensional semi finished product, treating said semi finished product with a nitrogen-containing atmosphere at a temperature of between 1000° C. and 1200° C. during a time and under a nitrogen pressure, sufficient to saturate the product through the thickness with a nitrogen content between a lower limit of 0.3 wt % and an upper limit that is provided by the beginning of nitride separation, cooling down said product at such a rate and nitrogen pressure that nitride separation is avoided, and subsequently machining the nitrogen saturated semi- finished product to the finished product. The invention further relates to a rotary shaving assembly prepared by the method of the invention. | 09-03-2009 |
| 20100236666 | SUPERALLOY POWDER, METHOD OF PROCESSING, AND ARTICLE FABRICATED THEREFROM - A method of processing a superalloy powder includes mechanically alloying nitrogen with superalloy powder particles having at least one nitride-forming element such that each superalloy powder particle includes a microstructure having nitrogen dispersed throughout the microstructure. The powder may then be formed into an article having nitride regions dispersed throughout. | 09-23-2010 |
| 20120111454 | Novel Stainless Steel Carburization Process - A process for the high temperature carburization of steel comprising heating said steel in a vacuum furnace in the presence of a hydrocarbon carburizing gas in combination with hydrogen wherein said carburizing gas/hydrogen combination is administered to the vacuum furnace by cyclically reducing the pressure in the furnace followed by the pulsed addition of the hydrocarbon carburizing gas with hydrogen at partial pressure followed by a second diffusion cycle wherein the steel is further annealed for a time sufficient to allow for the additional deposition of from about 0.8% to about 3.0% m/o of said carbon onto the surface of said steel to permit the further migration of the carbon from the steel surface to the interior thereof. | 05-10-2012 |
| 20160168668 | METHOD OF FABRICATING AN ALUMINUM MATRIX COMPOSITE AND AN ALUMINUM MATRIX COMPOSITE FABRICATED BY THE SAME | 06-16-2016 |
| 148221000 |
With casting or solidifying from melt | 4 |
| 20110277886 | NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY - A nitrided steel product or thin cast steel strip comprising, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, niobium between 0.01 and about 0.20%, and between 0.01 and 0.075% nitrogen, and having a majority of the microstructure comprised of bainite and acicular ferrite, having more than 70% niobium in solid solution prior to nitriding and having yield strength between 650 MPa and 800 MPa and tensile strength between 750 MPa and 900 MPa. | 11-17-2011 |
| 20120018051 | NITRATABLE STEEL MATERIAL COMPOSITION FOR PRODUCING PISTON RINGS AND CYLINDRICAL SLEEVES - A steel composition which has good nitridability, in particular for the manufacture of piston rings and cylinder liners, contains the following elements in the following quantities expressed with respect to 100 weight % of the steel composition: 0.5-1.5 weight % Al, 0.5-1.2 weight % C, 68.2-96.9 weight % Fe, 0.1-3.0 weight % Mn and 2.0-10.0 weight % Si. It can be manufactured by producing a melt of starting materials and casting the melt into a prepared mould. Nitriding the steel composition obtained results in a nitrided steel composition produced by gravity casting manufacturing with properties that surpass those of hardened and tempered spheroidal graphite. | 01-26-2012 |
| 20120186703 | NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY - A nitrided steel product or thin cast steel strip comprising, by weight, less than 0.25% carbon, between 0.20 and 2.0% manganese, between 0.05 and 0.50% silicon, less than 0.01% aluminum, niobium between 0.01 and about 0.20%, and between 0.01 and 0.075% nitrogen, and having a majority of the microstructure comprised of bainite and acicular ferrite, having more than 70% niobium in solid solution prior to nitriding and having after nitriding for one hour yield strength between 600 MPa and 800 MPa and tensile strength between 650 MPa and 900 MPa and no more than a 2% decrease in total elongation from the steel product prior to nitriding. | 07-26-2012 |
| 20140251500 | CERIUM-IRON-BASED MAGNETIC COMPOUNDS - New magnetic materials containing cerium, iron, and small additions of a third element are disclosed. These materials comprise compounds Ce(Fe | 09-11-2014 |
| 148224000 |
Utilizing wave energy (e.g., laser, etc.) or electric heating with work as conductor | 3 |
| 20110259475 | Method of nitriding nickel-cadmium-based superalloys - The method of nitriding nickel-cadmium-based superalloys is a method of forming a nitride barrier layer on a surface of a nickel-cadmium-based superalloy workpiece, such as an Inconel® 718 plate, using gas-assisted laser nitriding. The nickel-cadmium-based superalloy workpiece is first cleaned, both with a chemical bath and then through an ultrasonic cleaning process. Following the cleaning of the workpiece, a laser beam is scanned over a surface of the nickel-cadmium-based superalloy workpiece. A stream of nitrogen gas, which may be elemental nitrogen or nitrogen in the form of ammonia gas or the like, is sprayed on the surface of the nickel-cadmium-based superalloy workpiece coaxially and simultaneously with the laser beam to form the nitride barrier layer. | 10-27-2011 |
| 20150020924 | COMPOSITE STEEL PART AND MANUFACTURING METHOD FOR THE SAME - A manufacturing method for a composite steel part including manufacturing a first steel part by preparing an intermediate product in which an extra portion is added, and heating the intermediate product to an austenitizing temperature in a carburizing atmosphere to form a carburized layer, cooling the intermediate product at a rate less than a cooling rate at which martensitic transformation is caused and in which the intermediate product is cooled to a temperature equal to or less than a temperature at which structure transformation due to the cooling is completed, heating the intermediate product to an austenitizing range by high-density energy and thereafter cooled at a rate equal to or more than the cooling rate at which martensitic transformation is caused to form a carburized quenched portion, cutting the extra portion of the intermediate product, and welding the first steel part and the second steel part to each other. | 01-22-2015 |
| 20160201184 | MODIFYING THE SURFACE CHEMISTRY OF A MATERIAL | 07-14-2016 |
| 148209000 |
Utilizing particulate fluid bed | 1 |
| 20090205751 | Method for modifying surface of titanium or titanium alloy by fluidized bed carburization - The present invention relates to a method for modifying the surface of titanium or a titanium alloy by a fluidized bed carburization process. The surface hardness of the titanium or the titanium alloy could be improved by the fluidized bed carburization process. The above-mentioned method includes the following steps: providing a fluidized bed furnace, in which a carburizing agent containing charcoal and carbonate powders of which the weight ratio is 10˜8:0.5˜2 is used; placing titanium or a titanium alloy in the fluidized bed furnace at the temperature ranging from 900° C. to 1200° C. for carburizing the titanium metal or the titanium alloy for a period more than 3 minutes; and then taking the titanium metal or the titanium alloy out for quenching. | 08-20-2009 |
| Entries |
| Document | Title | Date |
|---|
| 20080257454 | COMPOSITION GRADIENT CERMETS AND REACTIVE HEAT TREATMENT PROCESS FOR PREPARING SAME - Cermets, particularly composition gradient cermets can be prepared starting with suitable bulk metal alloys by a reactive heat treatment process involving a reactive environment selected from the group consisting of reactive carbon, reactive nitrogen, reactive boron, reactive oxygen and mixtures thereof. | 10-23-2008 |
| 20090101239 | Method for processing metal body and apparatus for processing metal body - The present invention provides a method for processing a metal body which can turn a metal structure of the metal body into a finer grain structure thus obtaining the high strength and the high ductility. In a method or an apparatus for processing a metal body which turns the metal structure of the metal body into the finer grain structure by forming a low deformation resistance region where the deformation resistance is locally lowered in the metal body and by deforming the low deformation resistance region by shearing, using a non-low deformation resistance region forming means which forms a non-low deformation resistance region by increasing the deformation resistance which is lowered in the low deformation resistance region, the non-low deformation resistance region is formed along the low deformation resistance region. | 04-23-2009 |
| 20100032059 | PROCESS TO MANUFACTURE SHAFT AND GUIDE PINS AS USED FOR PLANETARY SYSTEMS - “PROCESS TO MANUFACTURE SHAFT AND GUIDE PINS AS USED FOR PLANETARY SYSTEMS”, the present invention refers to the technical field of automotive parts, more specifically to a process to manufacture a shaft ( | 02-11-2010 |
| 20110284132 | METHOD FOR REDUCTION OF TIME IN A GAS CARBURIZING PROCESS AND COOLING APPARATUS - The present invention provides a process for reduction of time in gas-carburizing process and cooling apparatus to perform carburization by step heating of a part during carburizing heating from 800° C., 850° C., 900° C. onwards to a carburization temperature of 930° C. with the part being held at each mentioned temperature for 10 minutes by adding LPG or propane along with methanol in the furnace for activation/diffusion, the holding time is thereby reduced for carburization, thereafter the carburized parts are quenched in the invented apparatus to discharge high severity of quenching. | 11-24-2011 |
| 20120103473 | METHOD FOR CARBONITRIDING - In a method for carbonitriding at least one metal part, the metal part is heated in a heating phase to a treatment temperature, is nitrided in at least one nitriding phase using a nitrogen donor gas, and is carburized in at least one carburizing phase using a carbon donor gas. The first nitriding phase begins after the termination of the heating phase and before the beginning of the first carburizing phase. | 05-03-2012 |
| 20120325372 | METHOD FOR REDUCTION OF TIME IN A GAS CARBURIZING PROCESS AND COOLING APPARATUS UTILIZING A HIGH SPEED QUENCHING OIL FLOW RATE - The present invention provides a process for reduction of time in gas-carburizing process and cooling apparatus to perform carburization by step heating of a part during carburizing heating from 800° C., 850° C., 900° C. onwards to a carburization temperature of 930° C. with the part being held at each mentioned temperature for 10 minutes by adding LPG or propane along with methanol in the furnace for activation/diffusion, the holding time is thereby reduced for carburization, thereafter the carburized parts are quenched in the invented apparatus to discharge high severity of quenching. A quenching oil flow rate of about 1.6 meters per second is critical to the process. | 12-27-2012 |
| 20160138151 | Steel Part and Method for Manufacturing the Same - A plurality of layers are laminated on at least part of the member under treatment made of steel, the plurality of layers having carbon concentrations higher than that of the member under treatment and 1.0 wt. % or less, the carbon concentration of an outermost layer of the plurality of layers being the highest. A method for manufacturing a steel part, including spraying powder containing carbon on at least part of an member under treatment made of steel so as to form a first layer having a carbon concentration higher than that of the member under treatment and spraying powder containing carbon on at least part of the first layer so as to form a second layer having a carbon concentration higher than that of the first layer. Carbon concentrations of a plurality of layers including the first layer and the second layer are 1.0 wt. % or less. | 05-19-2016 |
