Class / Patent application number | Description | Number of patent applications / Date published |
148218000 | Combined carburizing and nitriding (e.g., carbonitriding, nitrocarburizing, etc.) | 52 |
20080277031 | Surface-carbonitrided stainless steel part excellent in wear resistance and its manufacturing method - A steel part according to the present invention is a part in which a surface of an austenitic stainless steel containing 3 to 20 mass % of Mn was carbonitrided to be hardened. By setting Vickers hardness of the surface to 1350 HV or more and setting a depth of a hardened layer having 1000 HV or more from the surface of the steel to 10 μm or more, when the part according to the present invention is applied to a part required for sliding and wear resistance particularly, the service life can be improved significantly. Further, since the manufacturing method is performed by only heating in a gas atmosphere, a large number of parts can be simultaneously treated. Thus the stainless steel parts of the present invention can be adopted to wide fields as stainless steel parts required for wear resistance. | 11-13-2008 |
20090101240 | CARBONITRIDING METHOD, MACHINERY COMPONENT FABRICATION METHOD, AND MACHINERY COMPONENT - A carbonitriding method that can improve the nitrogen permeating rate to render the carbonitriding process effective is directed to carbonitriding a workpiece formed of steel that contains at least 0.8 mass % of carbon by heating in an atmosphere including ammonia, carbon monoxide, carbon dioxide and hydrogen. The method includes an atmosphere control step ( | 04-23-2009 |
20090165896 | Carbonitriding Method, Machinery Component Fabrication Method, and Machinery Component - A carbonitriding method that allows the permeating rate of nitrogen to be increased to improve the efficiency of the carbonitriding process is directed to carbonitriding a workpiece formed of steel containing at least 0.8 mass % of carbon, including an atmosphere control step of controlling the atmosphere in a heat treatment furnace, and a heating pattern control step of controlling the temperature history applied to a workpiece. The atmosphere control step includes an undecomposed ammonia concentration control step of controlling the undecomposed ammonia concentration in the heat treatment furnace, and a partial pressure control step of controlling the partial pressure of at least one of carbon monoxide and carbon dioxide in the heat treatment furnace. In the atmosphere control step, the undecomposed ammonia concentration control step and partial pressure control step are carried out such that the γ value defined by γ=a | 07-02-2009 |
20100037991 | DIFFUSION PROMOTERS FOR LOW TEMPERATURE CASE HARDENING - Low temperature carburization of a workpiece surface is accomplished faster by impregnating the surface with a diffusion promoter prior to or during the low temperature carburization process. | 02-18-2010 |
20100139811 | CARBONITRIDED INDUCTION HARDENED STEEL PART SUPERIOR IN SURFACE FATIGUE STRENGTH AT HIGH TEMPERATURE AND METHOD OF PRODUCTION OF SAME - The present invention provides a gear, continuously variable transmission, constant velocity joint, hub, or other steel part superior in surface fatigue strength compared with the past and method of production of the same, that is, provides a carbonitrided induction hardened steel part made of steel comprised of a specific composition of chemical ingredients and carbonitrided, then treated by induction hardening, the steel part characterized in that a surface N concentration is 0.1 to 0.8 mass %, a sum of an N concentration and C concentration is 1.0 to 2.0 mass %, an amount of surface residual austenite is less than 15 vol %, a depth of the incompletely hardened layer from the surface is less than 5 μm, and a surface X-ray diffraction half width is 6.0 degrees or more, and a method of production of the same. | 06-10-2010 |
20100282369 | Noveske rifleworks extreme duty machine gun barrel - An improved method for producing barrels which need to operate at temperatures exceeding 800 degrees for prolonged periods of time. The method described is ideally suited for barrels which are a part of a crew served weapons, belt feed systems or other fully automatic weapons. My method has limited effect on the accuracy potential of the barrel produced and therefore should not be excluded from use on shoulder fired weapons and precision rifles. | 11-11-2010 |
20110284133 | CARBONITRIDED PART AND PROCESS FOR PRODUCING CARBONITRIDED PART - A carbonitrided part, where a base steel contains, in mass percent, C: 0.10 to 0.35%, Si: 0.15 to 1.0%, Mn: 0.30 to 1.0%, Cr: 0.40 to 2.0%, S≦0.05%, and according to need further Mo≦0.50%, with the balance being Fe and impurities, and in the region to a position of effective hardening depth from the surface of a hardened layer of the carbonitrided part, iron nitride particles of ε-Fe | 11-24-2011 |
20120111456 | METHOD OF ACTIVATING AN ARTICLE OF PASSIVE FERROUS OR NON-FERROUS METAL PRIOR TO CARBURISING, NITRIDING AND /OR NITROCARBURISING - A method of activating an article of passive ferrous or non-ferrous metal by heating at least one compound containing nitrogen and carbon, wherein the article is treated with gaseous species derived from the compound. The activated article can be subsequently carburised, nitrided or nitrocarburised in shorter time at lower temperature and resulting superior mechanical properties compared with non-activated articles and even articles of stainless steel, nickel alloy, cobalt alloy or titanium based material can be carburised, nitrided or nitrocarburised. | 05-10-2012 |
20120118434 | STEEL MEMBER HAVING NITROGEN COMPOUND LAYER AND PROCESS FOR PRODUCING SAME - A process for duplex heat treatment of combined nitriding treatment and induction quenching treatment on an iron and steel material includes a chemical conversion treatment step for forming a chemical conversion film on a nitrogen compound layer formed on the iron and steel material by the nitriding treatment, after the nitriding treatment and before the induction quenching treatment. A compound layer formed on a surface of an iron and steel material by nitriding treatment is prevented from being oxidized by induction quenching, so that unevenness in film thickness between different portions of an oxidization-inhibiting film does not easily occur, with the result that a nitrogen-containing compound layer obtained after high-frequency heating remain uniformly. | 05-17-2012 |
20120125486 | METHOD AND DEVICE FOR TREATING A MATERIAL EXPOSED TO A MAGNETIC FIELD - The disclosure concerns a method for treating a material in a static magnetic field having an intensity of more than 1 Tesla, including the following steps:
| 05-24-2012 |
20120168033 | Method and Device for Hardening Work Pieces and Workpieces Hardened According to Said Method - The invention relates to a method and device for thermally treating workpieces, the device including a cooling chamber and two or more cementing chambers in which the workpieces are heated to a temperature of 950 to 1200° C. by means of direct heat radiation from a heating device. | 07-05-2012 |
20120227867 | TURBOCHARGER HOUSING WITH A CONVERSION COATING AND METHODS OF MAKING THE CONVERSION COATING - A method for increasing wear resistance of a turbocharger includes exposing at least a bearing surface of a center housing of the turbocharger to a gas nitrocarburizing process or a plasma nitrocarburizing process, thereby forming a conversion coating impregnated onto the at least the bearing surface. | 09-13-2012 |
20120255652 | METHOD FOR IMPROVING SURFACE MECHANICAL PROPERTIES OF NON-AUSTENITIC STAINLESS STEELS - A method for improving surface mechanical properties of non-austenitic stainless steels comprises steps of: providing a non-austenitic stainless steel material; placing the non-austenitic stainless steel material in an environment containing at least one austenite-stabilizing element, and implanting the austenite-stabilizing elements into a surface of the non-austenitic stainless steel material to form a modified layer enriched with the austenite-stabilizing elements; and placing the non-austenitic stainless steel material in a carbon-bearing atmosphere to make the modified layer in contact with the carbon-bearing atmosphere, and maintaining the non-austenitic stainless steel material at a carburizing temperature below 600° C. to implant carbon into the modified layer to form a carburized layer. The carburized layer enhances the surface hardness of the non-austenitic stainless steel material and enables it to apply to decorative components or structural components demanding high abrasion resistance, high surface hardness, and high corrosion resistance. | 10-11-2012 |
20120273089 | SEAT STRUCTURAL COMPONENT TAILORED FOR STRENGTH - The present invention relates to a component { | 11-01-2012 |
20130000787 | Salt Bath Ferritic Nitrocarburizing of Brake Rotors - Ferritic nitrocarburized surface treatment of cast iron brake rotors providing oxidation resistance, good braking performance and absence of distortion. Machined brake rotors are pre-heated, then immersed into a high temperature molten nitrocarburizing salt bath for a first predetermined dwell time. After removing the brake rotors from the nitrocarburizing salt bath, the brake rotors are directly immersed into an oxidizing salt bath at a lower temperature than the nitrocarburizing salt bath so that the brake rotors are thermally quenched. After a predetermined second dwell time in the oxidizing salt bath, the brake rotors are removed therefrom and further cooled to room temperature, either by water application thermal quenching or slow cooling in air. A fixture provides stable holding the brake rotors with a minimum of contact during placement in the salt baths. | 01-03-2013 |
20130037173 | METHOD FOR CARBONITRIDING AT LEAST ONE COMPONENT IN A TREATMENT CHAMBER - The invention relates to a method for carbonitriding at least one component ( | 02-14-2013 |
20130042947 | LOW PRESSURE CARBONITRIDING METHOD AND DEVICE - A method for carbonitriding a steel part arranged in an enclosure maintained at a reduced internal pressure, the part being maintained at a temperature level, comprising an alternation of first and second steps, a carburizing gas being injected into the enclosure during the first steps only and a nitriding gas being injected into the enclosure only during at least part of at least two second steps. | 02-21-2013 |
20130126048 | Nitrogen Alloyed Martensitic Stainless Steel and Process - The present invention comprises a process for nitriding martensitic stainless steel and the alloy produced thereby comprising heating a stainless steel alloy to a temperature of from about 900° F. (480° C.) to about 2500° F. (1370° C.) in a vacuum furnace in the presence of hydrogen or argon gas in order to clean the surface. After the hydrogen or argon gas is removed from the chamber, nitrogen gas, or a different nitrogen gas derivative is injected into said furnace as a pulsed injection at a partial pressure of from about 500 torr to about 1000 torr. The steel is nitrogen alloyed at a temperature of from about 1400° F. (760° C.) to about 2200° F. (1205° C.) and then quickly quenched at ambient temperature. Preferably, after a sufficient period of time, the temperature is raised a second time from about 900° F. (480° C.) to about 2500° F. (1370° C.) prior to cooling the final product. | 05-23-2013 |
20130126049 | PROCESS FOR CARBONITRIDING METALLIC COMPONENTS - In a process for carbonitriding metallic components ( | 05-23-2013 |
20140048180 | METHOD FOR SOLUTION HARDENING OF A COLD DEFORMED WORKPIECE OF A PASSIVE ALLOY, AND A MEMBER SOLUTION HARDENED BY THE METHOD - The invention relates to a method for method for formation of expanded austenite and/or expanded martensite by solution hardening of a cold deformed workpiece of a passive alloy, which method comprises a first step of dissolving at least nitrogen in the workpiece at a temperature T | 02-20-2014 |
20140166160 | SURFACE TREATMENT OF A METAL PART - A process for the surface treatment of a metal part comprises: exposing a surface ( | 06-19-2014 |
20140209214 | METHOD AND STEEL COMPONENT - Method for heat treating a steel component ( | 07-31-2014 |
20140238549 | Method for Low-Pressure Carbonitriding Having an Extended Temperature Range in an Initial Nitridation Phase - A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T). | 08-28-2014 |
20140246126 | METHOD FOR PRODUCING STEEL COMPONENT - A method for producing a steel component by performing the treatments of the following sequentially steps 1 and 2 to a steel material containing, by mass %, C: 0.15 to 0.25%, Si: 0.01 to 0.10%, Mn: 0.50 to 0.80%, S: 0.003 to 0.030%, Cr: 0.80 to 1.20%, Mo: 0.30 to 0.45%, Al: 0.015 to 0.050%, and N: 0.010 to 0.025%, wherein Cr/Mn is 1.3 to 2.4, the balance being Fe and impurities, and contents of P and O among the impurities are P: not more than 0.010%, and O: not more than 0.0020%:
| 09-04-2014 |
20140352848 | Method for adjusting pore size of porous metal material and pore structure of porous metal material - Disclosed are a method for adjusting the pore size of a porous metal material and the pore structure of a porous metal material. The method comprises: permeating at least one element into the surface of the pores of the material to generate a permeated layer on the surface of the pores, so that the average pore size of the porous material is reduced to within a certain range, thus obtaining a pore structure of the porous metal material having the pores distributed on the surface of the material and the permeated layer provided on the surface of the pores. | 12-04-2014 |
20140366992 | PROCESS FOR PRODUCING CARBONITRIDED PART - A process for producing a carbonitrided part comprising the steps of preparing a base steel part, having a composition comprising, in mass percent, C: 0.10 to 0.24%, Si: 0.15 to 1.0%, Mn: 0.30 to 1.0%, Cr: 0.40 to 2.0%, S: 0.05% or less, with the balance being Fe and impurities and performing the following steps 1-4 in sequence. Step 1 is carburizing the base steel part under a carburizing atmosphere at a temperature of 900 to 950° C. Step 2 is carbonitriding the base steel part carburized according to step 1 under a carbonitriding atmosphere at a temperature of 800 to 900° C. with a nitrogen potential of 0.2 to 0.6%. Step 3 is quenching the base steel part carbonitrided according to step 2. Step 4 is tempering the base steel part quenched according to step 3 at a temperature of more than 250° C. to not more than 350° C. | 12-18-2014 |
20160032442 | ENHANCED ACTIVATION OF SELF-PASSIVATING METALS - A workpiece made from a self passivating metal and having one or more surface regions defining a Beilby layer as a result of a previous metal shaping operation is activated for subsequent low temperature gas hardening by exposing the workpiece to the vapors produced by heating an oxygen-free nitrogen halide salt. | 02-04-2016 |
20160053359 | PROCESS AND APPARATUS FOR THERMOCHEMICALLY HARDENING WORKPIECES - A process and apparatus for thermochemically hardening workpieces is provided incorporating the following steps, carried out in a variable sequence: one or more carburizing steps, each in a carbon-containing gas atmosphere at a pressure of less than 50 mbar, the workpieces being held at temperatures of 900 to 1050° C.; if appropriate, one or more diffusion steps, each in a gas atmosphere at a pressure of less than 100 mbar; and one or more nitriding steps, each in a nitrogen-containing discharge plasma at a pressure of less than 50 mbar, the workpieces being held at temperatures of 800 to 1050° C. | 02-25-2016 |
20160122858 | CARBURIZED COMPONENT AND METHOD FOR MANUFACTURING SAME - The present invention provides a carburized part which is formed by processing a steel into a shape of a part and performing a carburizing treatment on the steel, the steel having a composition consisting essentially of, in terms of % by mass: 0.10% to 0.40% of C; 0.05% to 2.00% of Si; 0.30% to 2.00% of Mn; 0.30% to 3.00% of Cr; 0.025% or less of N; and as a pinning particle forming element which forms a pinning particle by nitrification, one or two or more elements selected from: 0.020% to 0.100% of Al; 0.01% to 0.20% of Nb; and 0.005% to 0.20% of Ti, and optionally: 0.80% or less of Mo, with the remainder being Fe and inevitable impurities, in which a crystal grain size number of a surface layer of the part at a depth of 50 μm or less from a surface is greater than 5, and the crystal grain size number of an inner portion of the part at a depth of 3 mm or more from the surface is 5 or less. | 05-05-2016 |
20160160327 | STEEL FOR NITROCARBURIZING, NITROCARBURIZED STEEL PART, AND PRODUCING METHOD OF NITROCARBURIZED STEEL PART - Steel for nitrocarburizing includes, by mass %, C: 0% to less than 0.15%; Si: 0.01% to 1.00%; Mn: 0.01% to 1.00%; S: 0.0001% to 0.050%; Al: 0.0001% to 0.050%; Ti: more than 0.50% to 1.50%; N: 0.0005% to 0.0100%; and the balance consisting of Fe and inevitable impurities, in which P is limited to 0.050% or less; O is limited to 0.0060% or less; and the amount of Ti [Ti %], the amount of C [C %], the amount of N [N %], and the amount of S [S %] satisfy 0.48<[Ti %]−47.9×([C %]/12+[N %]/14+[S %]/32)≦1.20. | 06-09-2016 |
148219000 | With working, machining, cutting, or post-carburizing and post-nitriding heating or quenching | 22 |
20100200119 | HARDENED MARTENSITIC STEEL HAVING A LOW OR ZERO CONTENT OF COBALT, METHOD FOR PRODUCING A COMPONENT FROM THIS STEEL, AND COMPONENT OBTAINED IN THIS MANNER - Steel, characterised in that the composition thereof is, in percentages by weight:
| 08-12-2010 |
20100276036 | CARBURIZATION PROCESS FOR STABILIZING NICKEL-BASED SUPERALLOYS - A process by which a nickel-based superalloy substrate prone to deleterious reactions with an aluminum-rich coating can be stabilized by carburization. The process generally entails processing the surface of the substrate to be substantially free of oxides, heating the substrate in a non-oxidizing atmosphere to a carburization temperature, and then contacting the surface of the substrate with a carburization gas mixture comprising a diluted low activity hydrocarbon gas while maintaining the substrate at the carburization temperature. While at the carburization temperature and contacted by the carburization gas, carbon atoms in the carburization gas dissociate therefrom, transfer onto the surface of the substrate, diffuse into the substrate, and react with refractory metals within the substrate to form refractory metal carbides within a carburized region beneath the surface of the substrate. The substrate is then cooled in a non-oxidizing atmosphere to terminate carbide formation. | 11-04-2010 |
20110000583 | Rolling part and manufacturing method thereof - A rolling part formed by performing spheroidizing annealing, processing, carbonitriding and finishing on a steel material containing C in an amount of 0.90 mass % to 1.10 mass %, Si in an amount of more than 0.35% and up to 0.70%, Mn in an amount of less than 0.80 mass %, Cr in an amount of 1.85 mass % to 2.50 mass %, O in an amount of 12 ppm or less, and the balance of Fe and unavoidable impurities. The mean C amount on a surface is from 1.20 mass % to 1.50 mass %, and the mean N amount is from 0.10 mass % to 0.60 mass %. Deposits having a particle size of 0.1 μm or more on the surface have a mean particle size of 0.6 μm or less, exist as 700,000 particles or more per mm | 01-06-2011 |
20110017351 | NITROCARBURIZED RAW MATERIAL FOR CRANKSHAFTS AND METHOD FOR MANUFACTURING THE SAME - It is devised to further enhance strength and straightening ability of a nitrocarburized raw material for crankshafts. A nitrocarburized raw material for crankshafts is formed so as to have a composition composed of C, Si, Mn, Cu, Ni, Cr, V, S, s-Al, Ca and N in prescribed % by mass, with the balance being Fe and inevitable impurities and having a structure of ferrite+pearlite; after smelting a steel having the foregoing composition, hot forging is performed; thereafter, a normalizing treatment is applied to the subject hot forged material at a treatment temperature in the range of from 780° C. to 850° C.; and straightening process for correcting bending to be caused due to the nitrocarburizing treatment is later applied. | 01-27-2011 |
20110226386 | Hardened Martensitic Steel Having a Low Cobalt Content, Process for Manufacturing a Part from Steel, and Part thus Obtained - A steel characterized in that its composition is percentages by weight:
| 09-22-2011 |
20120018050 | STEEL FOR SURFACE LAYER HARDENING TREATMENT, SURFACE LAYER-HARDENED STEEL PART, AND METHOD OF MANUFACTURING THE SAME - In the steel for a surface layer hardening which is treated with carburizing in a temperature range of 800° C. to 900° C., chemical composition thereof contains, by mass %, C: 0.10% to 0.60%, Si: 0.01% to 2.50%, Mn: 0.20% to 2.00%, S: 0.0001% to 0.10%, Cr: 2.00% to 5.00%, Al: 0.001% to 0.50%, N: 0.0020% to 0.020%, P: 0.001% to 0.050%, and O: 0.0001% to 0.0030%; the remaining portion thereof includes Fe and unavoidable impurities; and the total amount of Cr, Si, and Mn satisfies, by mass %, 2.0≦Cr+Si+Mn≦8.0. | 01-26-2012 |
20120211122 | METHOD FOR PRODUCING CARBONITRIDED MEMBER - A method for producing a carbonitrided member comprising the steps of carburizing a steel part having a composition of, by mass percent, C: 0.10 to 0.35%, Si: 0.15 to 1.0%, Mn: 0.30 to 1.0%, Cr: 0.40 to 2.0%, S: 0.05% or less with the balance being Fe and impurities in a carburizing atmosphere of 900 to 950° C. The carburized steel part is carbonitrided in a carbonitriding atmosphere with the temperature of 800 to 900° C. and the nitrogen potential of 0.2 to 0.6%. The carbonitrided steel part is qhenched and then shot peened. The shot peening treatment may be further performed while heating to a temperature not higher than 350° C. or immediately after heating to a temperature not higher than 350° C. After quenching, the shot peening treatment may be further performed after tempering in the temperature range exceeding 250° C. and not higher than 350° C. | 08-23-2012 |
20120318407 | SPRING STEEL AND SURFACE TREATMENT METHOD FOR STEEL MATERIAL - A surface treatment method for a steel material includes carbonitriding, quenching, and tempering. The steel material consists of, by weight %, 0.27 to 0.48% of C, 0.01 to 2.2% of Si, 0.30 to 1.0% of Mn, not more than 0.035% of P, not more than 0.035% of 8, and the balance of Fe and inevitable impurities. The carbonitriding step is performed by heating the steel at a temperature of not less than the A | 12-20-2012 |
20130000788 | METHOD FOR MANUFACTURING BASE MATERIAL FOR WAVE GEAR - A method for manufacturing a base material for a wave gear which enables the effective suppression of man-hours and manufacturing cost while providing the required strength and elastic deformation characteristics for an external gear of a wave gear. In this manufacturing method, steel having a carbon content of 0.48% or less is subjected to primary molding by being cold worked into the shape of an external gear for a wave gear. The resulting primary molded article is heated to a temperature range in which the main phase of the metallographic structure thereof forms an austenitic structure. The main phase of the metallographic structure is formed into bainite by carrying out quenching to a predetermined temperature higher than the martensitic transformation starting temperature and maintaining the temperature for a predetermined time. The product is then cooled to normal temperature. | 01-03-2013 |
20130146180 | STEEL FOR CARBURIZING, CARBURIZED STEEL COMPONENT, AND METHOD OF PRODUCING THE SAME - A steel for a carburizing and a carburized steel component having a steel portion and a carburized layer with a thickness of more than 0.4 mm to less than 2 mm which is formed on an outside of the steel portion. A chemical composition of the steel for the carburizing and the steel portion of the carburized steel component satisfies simultaneously equations of a hardness parameter, a hardenability parameter, and a TiC precipitation parameter. | 06-13-2013 |
20130146181 | STEEL FOR CARBURIZING, CARBURIZED STEEL COMPONENT, AND METHOD OF PRODUCING THE SAME - A steel for a carburizing and a carburized steel component having a steel portion and a carburized layer with a thickness of more than 0.4 mm to less than 2 mm which is formed on an outside of the steel portion. A chemical composition of the steel for the carburizing and the steel portion of the carburized steel component satisfies simultaneously equations of a hardness parameter, a hardenability parameter, and an AlN precipitation parameter. | 06-13-2013 |
20130180626 | STEEL FOR MACHINE STRUCTURAL PURPOSES FOR SURFACE HARDENING USE AND STEEL PARTS FOR MACHINE STRUCTURAL PURPOSES AND METHOD OF PRODUCTION OF SAME - A steel for surface hardening for machine structural use which is characterized by containing, in terms of mass %, 0.30-0.60% C, 0.02-2.0% Si, 0.35-1.5% Mn, 0.001-0.5% Al, 0.05-2.0% Cr, 0.001-1.0% Sn, 0.0001-0.021% S, 0.0030-0.0055% N, 0.01-2.0% Ni, 0.01-2.0% Cu, up to 0.030% P, and up to 0.005% O, with the remainder comprising Fe and incidental impurities, the contents of Sn, Cu, Ni, Mn, and S satisfying relationships (1) and (2). | 07-18-2013 |
20130213526 | BRAIDING MACHINE - A braiding machine is provided comprising a support member, a series of drivers carried by the support member arranged in a circle around a braiding point, a mechanism to rotate adjacent of the drivers in opposite directions, a series of strand supply carrier spindles, and a plurality of cars for mounting of an associated spindle to be driven by the drivers for travel in serpentine intersecting paths in opposite directions around the braiding point. Each of the plurality of cars comprises a unitary central post, a mounting base, and a foot. The post extends from a bottom plane surface of the foot through the foot and the mounting base. The foot and the mounting base are spaced from one another and both provide support to the post. | 08-22-2013 |
20140041762 | METHOD OF HEAT TREATING A STEEL COMPONENT - Method for heat treating a steel component ( | 02-13-2014 |
20140041763 | GAS NITROCARBURIZING METHOD AND METHOD FOR MANUFACTURING BEARING PART - Provided is a gas nitrocarburizing method forming a nitride layer in a surface layer portion of a workpiece made of steel by heating the workpiece within a heat treatment furnace into which a heat treatment gas is introduced, the heat treatment gas containing ammonia gas and at least one of carbon dioxide gas and hydrogen gas, and having a remainder formed of an impurity. | 02-13-2014 |
20140290800 | Carbonitriding Method having a Final Nitridation Step During Temperature Decrease - A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. carried out using a reduced temperature gradient relative to the simple heating phase. The method further includes alternate cementing (C | 10-02-2014 |
20140305548 | CARBO-NITRIDING PROCESS FOR MARTENSITIC STAINLESS STEEL AND STAINLESS STEEL ARTICLE HAVING IMPROVED CORROSION RESISTANCE - A method for producing a case-hardened martensitic stainless steel article includes: providing an article comprised, at least in part, of a martensitic stainless steel, carburizing the article within a temperature range of 1625° F.-1680° F. (885° C.-916° C.), and then carbo-nitriding the article within a temperature range of 1575° F.-1625° F. (857° C.-885° C.). An article, such as a bearing ring, comprising such a case-hardened martensitic stainless steel is also disclosed. | 10-16-2014 |
20140326365 | NITROCARBURIZED CRANKSHAFT AND METHOD OF MANUFACTURING THE SAME - Provided is a method of manufacturing a nitrocarburized crankshaft which is obtained by subjecting a bainitic microalloyed steel to a forging and a machining, and further subjecting the bainitic microalloyed steel to at least a strain releasing heat treatment and a subsequent nitrocarburizing treatment, the bainitic microalloyed steel containing, as essentially added elements, in terms of mass %: 0.10% to 0.40% of C; 0.10% to 1.0% of Si; 1.0% to 2.0% of Mn; 0.05% to 0.40% of Mo; and 0.05% to 0.40% of V, and the bainitic microalloyed steel optionally further containing, as arbitrarily added elements, in terms of mass %: 0.01% to 0.1% of S; 0.005% to 0.2% of Ti; 0.001% to 0.03% of Al; 0.50% or less of Cr; 0.5% or less of Cu; and 0.5% or less of Ni, with the balance being Fe and unavoidable impurities. | 11-06-2014 |
20150101710 | Method for Low-Pressure Carbonitriding Using a Reduced Temperature Gradient in an Initial Nitridation Phase - A method for the low-pressure carbonitriding of steel parts, in particular parts used in the manufacture of automobiles, comprises a heating step that includes a simple heating phase (M) followed by an initial nitridation phase (Ni) from a temperature between 700° C. to 750° C. to a temperature between 860° and 1000° C. and carried out using a reduced temperature gradient relative to the simple heating phase. Additionally, alternate cementing (C1-Cn) and nitridation (N1-Nn) steps are performed at constant temperature, wherein the final nitridation step is accompanied with a decrease in temperature immediately before quenching (T). | 04-16-2015 |
20150292053 | METHOD FOR TREATING A CAST IRON WORKPIECE AND WORKPIECE FORMED THEREBY - A method for treating a cast iron workpiece to increase a useful life thereof includes machining the workpiece to provide a finish surface thereon and deforming the finish surface of the workpiece by rubbing the finish surface against a blunt tool ( | 10-15-2015 |
20160102395 | THREE STEP SURFACE ENHANCEMENT PROCESS FOR CARBON ALLOY FLUID ENDS - A method for improving corrosion resistance and fatigue performance of a metallic surface of an article comprises nitrocarburizing the metallic surface to provide a nitrocarburized surface; forming an oxide layer on the nitrocarburized surface; and treating the oxide layer with a mechanical process. | 04-14-2016 |
20160130679 | Post Machining Multi-Step Material Working Treatment of Fluid End Housing - A method for post machining treatment of the interior surfaces of the access, suction, and discharge bores within each fluid chamber of the fluid end housing of a plunger pump that includes a three (3) step cold and hot working process. The treatment processes include a first shot peening of selected sections of said interior surfaces of each fluid chamber; a quench-polish-quench process whereby an anticorrosion nitride surface layer is added to the interior surfaces of each fluid chamber; and a second shot peening of the selected sections of the interior surfaces of each fluid chamber. | 05-12-2016 |