Class / Patent application number | Description | Number of patent applications / Date published |
148210000 | Of selected surface area (e.g., zone, top only, etc.) | 17 |
20090078339 | Workpiece designed for rolling stresses and formed of fully hardening steel, and a heat treatment process therefor - A workpiece is designed for rolling stresses and includes a body having a core zone and a carbonitrided surface zone which surrounds the core zone. The workpiece body is formed of a fully hardening steel. The core zone has a bainite microstructure as its main constituent. The surface zone of the workpiece has a mixed microstructure comprising martensite and bainite and the martensite in the surface zone constitutes a proportion of at least twenty percent by volume. | 03-26-2009 |
20090205752 | Die reinforcing method and die repairing method - A mixed powder layer is applied by coating to a cavity of a forging die made of an Fe-base alloy, at least to the region of the cavity to be reinforced or repaired, the mixed powder layer comprising the first element powder capable of being converted into a carbide to enhance the hardness of the forging die and the second element powder having a melting point lower than that of the first element powder. Die reinforcing is carried out by forging a work by using a forging die covered with the mixed powder layer and heat-treating the die by utilizing the working heat generated in the forging to thereby make the layer reflow and diffuse the carbide in the die. | 08-20-2009 |
20100154936 | PROTECTIVE COATING AND PROCESS FOR PRODUCING THE SAME - A coating ( | 06-24-2010 |
20120060977 | METHOD OF MANUFACTURING CARBURIZED PARTS - To provide a method of manufacturing a carburized part contributable to cost reduction, a portion intended for a non-carburizing portion is treated to a surface roughness corresponding to Rz 50 like a first work surface and a portion intended for a carburizing portion is treated to a surface roughness corresponding to Rz 1.5 like a second work surface. | 03-15-2012 |
20150337429 | TREATMENT TO ENHANCE STRUCTURAL COMPONENTS - A process enhances at least surface hardness or chemical resistance of a metal-plated iron-containing component. The process is performed by:
| 11-26-2015 |
20150345004 | METHOD FOR TREATING PLATE - A method for locally treating a plate is disclosed. A pattern formed from a compound containing at least one alloying element is applied onto at least one surface of the plate. At least the surface of a contacting layer including the pattern is covered by adequately heat-resistant material. The plate is subsequently heat treated in order to diffuse the alloying element into the plate. | 12-03-2015 |
148211000 | With working, machining, or cutting | 5 |
20100263765 | CYLINDER JACKET AND METHOD FOR PRODUCING THE SAME - The invention relates to a method for producing a cylinder jacket, comprising the following steps: producing a cylindrical starting product from a steel material having a carbon content of not more than 0.8% by weight and a ferritic or ferritic/pearlitic structure; enriching, by carburization, the surface layer of the inner peripheral surface of the cylindrical starting product with carbon in the form of carbides that are deposited on the grain boundaries; slowly cooling the cylindrical starting product in such a manner that a pearlitic structure having a carbide network is formed in the surface layer; finishing the cylindrical starting product to give a cylinder jacket. The invention also relates to a cylinder jacket produced by said method. | 10-21-2010 |
20110079326 | METHOD TO INCREASE CORROSION RESISTANCE IN FERRITIC NITROCARBURIZED TREATED CAST IRON SUBSTRATES - A method for improving corrosion resistance in FNC cast iron substrates without the need for additional coating or painting. The exemplary methods remove a portion of the FNC coating applied to a cast iron substrate, preferably through polishing, to expose the epsilon phase portion of the compound area. The epsilon phase portion is thought to provide improved corrosion protection as compared to non-polished FNC cast iron substrates. One exemplary product that may be provided with improved corrosion protection according to the above method is a brake rotor having a FNC treatment. | 04-07-2011 |
20120085465 | CARBURIZED COMPONENT AND MANUFACTURING METHOD - A carburized component with improved fatigue strength has a base steel containing, by mass %, C: 0.15-0.25%, Si: 0.03-0.50%, Mn: more than 0.60% and not more than 1.5%, P≦0.015%, S: 0.006-0.030%, Cr: 0.05-2.0%, Al≦0.10%, N≦0.03%, and O≦0.0020%, and optionally at least one element selected from Mo, Cu, Ni, B, Ti, Nb and V, the balance being Fe and impurities. A surface hardened layer portion satisfies: (a) average carbon concentration in the region from the outermost surface to a point of 0.2 mm depth of 0.35-0.60 mass %, (b) surface roughness Rz≦15 μm, and (c) σr(0)≦-800 MPa, σr(100)≦-800 MPa, and residual stress intensity index Ir≦80000, wherein Ir is calculated by [Ir=∫|σr(y)|dy], where y μm is the depth from the outermost surface and σr(y) is the residual stress for the points from the outermost surface to a depth of 100 μm with the range of y from 0 to 100 (μm). | 04-12-2012 |
20120267009 | COMPOSITE STEEL PART AND MANUFACTURING METHOD FOR THE SAME - A manufacturing method for a composite steel part including preparing an intermediate product in which an extra portion, which has a thickness equal to or more than that of a carburized layer to be formed in a subsequent carburizing step, has been added to a welding expected portion, carburizing the intermediate product by heating to an austenitizing temperature or more in a carburizing atmosphere, then cooling the intermediate product at a cooling rate less than a rate at which martensitic transformation occurs and without completing structural transformation due to the cooling, quenching a portion of the intermediate product after heating to an austenitizing range by high-density energy and thereafter cooling to cause martensitic transformation to form a carburized quenched portion, removing an extra portion of the intermediate product; and then welding a second steel part to the welding expected portion. | 10-25-2012 |
20120267010 | 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. | 10-25-2012 |
148212000 | Nitriding | 5 |
20100051141 | METHOD FOR ENHANCING FRETTING FATIGUE RESISTANCE OF ALLOYS - A method for increasing the fretting fatigue resistance of an alloy by prehardened a surface of the alloy followed by laser shock peening the prehardened surface. In one exemplary embodiment, an orthopedic prosthesis is formed from a titanium alloy and subjected to surface nitriding followed by laser shock peening. By nitriding the titanium alloy, the hardness of the alloy's surface is increased. Then, by subjecting the nitrided surface of the alloy to laser shock peening, the fretting fatigue of the nitrided surface may be increased by more than 100%. | 03-04-2010 |
20150107719 | PARTIAL HEAT-TREATMENT METHOD USING DOUBLE METAL LAYER - Disclosed herein is a partial heat treatment method using a double metal layer, in which a surface of a workpiece is hardened by heat treatment, including the steps of: primarily plating the surface of the workpiece with a first metal layer; secondarily plating the surface of the first metal layer with a second metal layer; partially stripping the first metal layer and the second metal layer to expose a part of the surface of the workpiece; heat-treating the workpiece to harden the exposed surface of the workpiece; and removing the first metal layer and the second metal layer remaining on the surface of the workpiece. | 04-23-2015 |
20150107720 | PARTIALLY CARBONITRIDING HEAT TREATED STAINLESS STEEL FERRULE AND MANUFACTURING METHOD THEREOF - This invention relates to a partially carbonitriding heat treated stainless steel ferrule, having a first region with a first hardness and a second region with a second hardness, wherein the first region includes a nitrogen layer having a nitrogen concentration higher than a carbon concentration, and a carbon layer formed under the nitrogen layer and having a carbon concentration higher than a nitrogen concentration, so that the first hardness is greater than the second hardness. Thereby, partial heat treatment is effective at preventing rotational torque of the region, except for the portion to be heat treated, from increasing due to the total hardening. | 04-23-2015 |
20160010166 | ROUGHLY SHAPED MATERIAL FOR INDUCTION HARDENED COMPONENTS AND METHOD FOR PRODUCING SAME | 01-14-2016 |
20160024636 | MANUFACTURING METHOD OF STEEL IN WHICH AN ELEMENT OF TREATMENT GAS IS DISSOLVED AND DIFFUSED - A manufacturing method of steel in which an element of the treatment gas is dissolved and diffused includes heating the steel, making a treatment gas contact a surface of the steel such that an element of the treatment gas dissolves and diffuses from the surface of the steel into a surface layer thereof, and reducing a concentration of the treatment gas near a non-treatment surface that is a portion of the surface of the steel. | 01-28-2016 |
148213000 | Utilizing attached protective shield, mask or coating | 1 |
148214000 | With noncarburizing or non-nitriding coating | 1 |
20110017350 | METHOD FOR CARBURIZING STEEL COMPONENTS - A carburizing process for increasing the hardness of a case region of a steel component. In one form the application includes plating the outer surface of a stainless steel component with nickel prior to carburizing. One component includes a stainless steel object having a hardened case substantially free of continuous phase grain boundary carbides. | 01-27-2011 |