| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 148217000 | With noncarburizing or non-nitriding reactive coating (e.g., oxidizing, siliconizing, boronizing, etc.) | 14 |
| 20080277030 | Composition and Process for Enhanced Properties of Ferrous Components - Components, such as gears and other power transmission components, are formed by near-net-forging a high strength, high toughness ferrous metal alloy, surface processing metal alloy to form a hardened surface region ( | 11-13-2008 |
| 20080283153 | FURNACE ATMOSPHERE ACTIVATION METHOD AND APPARATUS - A gas injector including in which a gas is passed through high-voltage/low-current electrical discharges before being discharged into the chamber of a thermal treatment furnace. The electrical activation of the gas accelerates desirable reactions between the gas, gases in the furnace chamber, and the chamber workload. Preferably, a hot electrode is electrically charged and the other parts of the gas injector and the furnace are grounded. | 11-20-2008 |
| 20090194202 | MAGNETIC ALLOY AND METHOD FOR PRODUCING SAME - Disclosed is a novel process for producing an NaZn | 08-06-2009 |
| 20110094627 | Erosion Resistant Cermet Linings For Oil & Gas Exploration, Refining and Petrochemical Processing Applications - The present invention is directed to a method for protecting metal surfaces in oil & gas exploration and production, refinery and petrochemical process applications subject to solid particulate erosion at temperatures of up to 1000° C. The method includes the step of providing the metal surfaces in such applications with a hot erosion resistant cermet lining or insert, wherein the cermet lining or insert includes a) about 30 to about 95 vol % of a ceramic phase, and b) a metal binder phase, wherein the cermet lining or insert has a HEAT erosion resistance index of at least 5.0 and a K | 04-28-2011 |
| 20110315275 | METHOD OF TREATING PARTS FOR KITCHEN UTENSILS - A method for processing parts for kitchen tools in order to protect the parts from scratches, includes sequentially: a nitridation step, optionally including a nitrocarburizing step, between 592 and 750° C. in order to promote the formation of a nitrogen austenite layer; and a processing step for promoting the conversion of at least a portion of the nitrogen austenite into a phase with reinforced hardness. | 12-29-2011 |
| 20120312425 | GAS-CARBURIZED STEEL PART EXCELLENT IN SURFACE FATIGUE STRENGTH, STEEL PRODUCT FOR GAS CARBURIZING, AND MANUFACTURING METHOD OF GAS-CARBURIZED STEEL PART - The present invention provides a steel product for gas carburizing used for manufacturing a carburized steel part. In the above steel product for gas carburizing, a composition of a base metal contains, in mass %, C: 0.1 to 0.4%, Si: exceeding 1.2 to 4.0%, Mn: 0.2 to 3.0%, Cr: 0.5 to 5.0%, Al: 0.005 to 0.1%, S: 0.001 to 0.3%, N: 0.003 to 0.03%, and O: limited to 0.0050% or less, and P: limited to 0.025% or less, and when the contents of Si, Mn, and Cr (mass %) are set to [Si %], [Mn %], and [Cr %], Expression (1) below is satisfied, and an alloy shortage layer satisfying Expression (2) below exists in a range from its surface to 2 to 50 μm in depth. | 12-13-2012 |
| 20130206284 | Method for Producing a Hot-Formed and Hardened Steel Component Coated with a Metallic Anti-Corrosion Coating from a Sheet Steel Product - A method for producing a steel component with a metallic anti-corrosion coating from a sheet steel product comprising at least 0.4% by weight Mn is disclosed. The sheet steel product is annealed in a continuous furnace under an annealing atmosphere containing up to 25% by volume H | 08-15-2013 |
| 20130284318 | PLASMA NITRIDING SURFACE TREATMENT METHOD FOR GRAY CAST IRON PART - Disclosed is a plasma nitriding surface treatment method for a gray cast iron part. In the plasma nitriding surface treatment method, a nitride layer is formed on a surface of the gray cast iron part by a selective ion nitriding treatment. The plasma nitriding surface treatment method is carried out such that the surface of the gray cast iron part is prevented from being deformed, and a reduction of the frictional coefficient of the part is prevented. | 10-31-2013 |
| 20140048179 | MANUFACTURING METHOD OF MACHINE COMPONENT - A method of manufacturing a machine component includes the steps of: preparing a member made of steel; forming a film containing vanadium at a surface by subjecting the member to oxidation; and forming a nitrogen-enriched layer by heating the member having the film formed in a heat treatment gas atmosphere containing nitrogen gas and absent of ammonia gas for carbonitriding. | 02-20-2014 |
| 20140060704 | MANUFACTURING METHOD OF CAST-IRON FRICTION MEMBER - A cast-iron friction member is manufactured by: performing a nitrocarburizing treatment on a cast workpiece at a treatment temperature of 500° C. to 600° C. to thus form a nitrogen compound layer on a surface of the workpiece; and exposing the workpiece to an atmosphere when a temperature becomes 400° C. to 480° C. after the nitrocarburizing treatment so as to cool the workpiece to a room temperature while keeping a contact state with oxygen to thus form an iron oxide layer including Fe | 03-06-2014 |
| 20140102592 | STEEL PRODUCT AND ITS MANUFACTURING METHOD - To provide a steel product excelling in both corrosion resistance and adhesion. A steel product having a nitride layer and a nitrogen diffused layer formed on the surface of a steel base material is provided. The nitride layer includes a first compound layer formed on a nitrogen diffused layer side and a second compound layer formed on a surface side of the first compound layer. The first compound layer has an ε-structure mainly made of Fe | 04-17-2014 |
| 20140338795 | METHOD FOR MANUFACTURING A TITANIUM ALLOY FOR BIOMEDICAL DEVICES - The invention relates to a method for manufacturing a titanium alloy having superelastic properties and/or shape memory for biomedical use, which comprises the steps of: preparing an ingot by melting the various metals that form the desired alloy in a vacuum; optionally homogenizing the ingot in a vacuum by high-temperature annealing (higher than 900° C.); first quenching; mechanical shaping (rolling, drawing, machining or the like); heat treatment for redissolution in beta phase beyond the beta transus temperature (until a second temperature and then maintaining same for a certain time); and second quenching; characterized in that said heat treatment phase is carried out in a gaseous atmosphere and also constitutes a surface treatment suitable for forming on the surface a layer of nitride, carbonitride, oxide, oxynitride or the like. | 11-20-2014 |
| 20160002747 | PROCESS FOR TREATING STEEL ALLOYS FOR GEARS - A process for treating a steel alloy component includes the steps of: providing a steel alloy component having a plurality of teeth with a root portion and a tip; and processing the steel alloy so that the root portion of the gear teeth are hardened without through hardening of the tips of the gear teeth. | 01-07-2016 |
| 20160115950 | Compressor, Oil-Free Screw Compressor, and Method of Manufacturing Casing Used Therefor - An object of the invention is to provide a compressor that includes a corrosion-resistant film formed on the surface of a casing having a complicated shape. A compressor pumps gas in a compression chamber formed by a casing, the casing is made of cast iron, and a layer made of a mixture of iron nitride and a compound of iron, nitrogen, and carbon and an oxide layer made of triiron tetraoxide are formed on the surface of the casing. Accordingly, since the corrosion resistance of the casing, which includes a film formed by a gas soft-nitriding treatment and an oxidation treatment, is improved, the generation of rust is suppressed. Therefore, it is possible to provide a compressor in which galling or sticking caused by rust occurs less. | 04-28-2016 |
