Class 148/219 - With working, machining, cutting, or post-carburizing and post-nitriding heating or quenching

Subclass of Class 148 - Metal treatment
Definition: Process which includes either (1) a step of deforming solid
No. of patents: 39
Last issue date: 11/09/2010

Number	Title	Issue Date
7828910	Method and process for thermochemical treatment of high-strength, high-toughness alloys High toughness, high strength alloys are thermochemically processed by performing concurrent bulk alloy heat treatment and surface engineering processing. The concurrent steps can include high temperature solutionizing together with carburizing and tempering togethe...	11/09/2010
7641742	Rolling bearing and heat treatment method for steel There is provided a rolling bearing which has long life against rolling fatigue and exhibits no decrease in fracture strength and no increase in rate of dimensional change over time, even if the part size thereof is large, and which can obtain higher strength by cry...	01/05/2010
7582170	Method for micromachining metallic materials A process for the low-wear micromachining of workpieces made from metal or metal alloys, in particular steel, in which a workpiece (1) is micromachined using at least one machining apparatus (5) that has a diamond tool (6), in particular an ultr...	09/01/2009
7384488	Method for producing gears and/or shaft components with superior bending fatigue strength and pitting fatigue life from conventional alloy steels A conventional aluminum killed alloy steel for case hardening of gear(s) and/or shaft components consisting of 0.10 to 0.30 weight % Carbon, 0.15 to 0.35 weight % Silicon, 0.8 to 1.5 weight % Chromium, 0.6 to 1.5 weight % Manganese, 0.017 to 0.040 weight % Aluminum,...	06/10/2008
7241088	Threading tap for cutting threads in blind holes and methods of its manufacture A threading tap for cutting threads in blind holes includes an elongated body with a central axis, the body having at a rear end a connector portion, and having at a front end a threading portion. The threading portion is provided with at least one helical thread-cu...	07/10/2007
7112248	Vacuum carbo-nitriding method A vacuum carbonitriding method includes: performing a vacuum carburizing process on an object to be treated (a workpiece) in a heat treating furnace under reduced pressures by supplying a carburizing gas into the furnace that has been heated to a predetermined carbu...	09/26/2006
7000444	Forging method and apparatus A method of producing a bevel gear, particularly a bevel ring gear, the bevel gear comprising mounting surfaces. The method comprising the steps of flashless warm forging a blank, preferably an annular blank, in a forging die to produce the bevel gear with precision...	02/21/2006
6858096	Rolling element for a continuously variable transmission (CVT), a CVT using the rolling element and a method for producing the rolling element A rolling element for a continuously variable transmission, including a plurality of rolling members having rolling contact portions that come into rolling contact with each other via lubricating oil. At least one of the rolling contact portions includes an outer su...	02/22/2005
6656293	Surface treatment for ferrous components A method for treating a surface of a first component wherein at least a portion of the surface of the first component contacts a surface of a second component. The method includes forming a compound layer at at least a portion of the surface of the first ...	12/02/2003
6623567	Method for high concentration carburizing and quenching of steel and high concentration carburized and quenched steel part A method for high concentration carburizing and quenching of steel is provided which is carried out by a treatment process including the steps of carbonitriding the steel at temperatures of from about 800 to about 880° C., and subsequently quenching the ...	09/23/2003
6454880	Material for die casting tooling components, method for making same, and tooling components made from the material and process Multi-layer material for die cast tooling component includes a low to medium carbon steel with alloying amounts of vanadium, manganese and molybdenum, quenched to at least 10 Bar and nitrocarburized to achieve a multiple layer structure with at least an o...	09/24/2002
6447619	High surface pressure resistant steel parts and methods of producing same High surface pressure resistant steel parts and their producing methods are disclosed. These steel parts are useful as gears, cams, bearings and similar high-strength compact steel articles which are required to have wear resistance and strength to withst...	09/10/2002
6423158	Rolling bearings and gear shaft support device A roller bearing which can sufficiently ensure an endurance life of rollers even under conditions where debris contamination and temperature rise are large. As the material for an outer ring, inner ring and tapered rollers, a steel in which the Si and-Mn ...	07/23/2002
6309475	Rolling element and producing method For easily producing a toothed material for high-strength gears etc. with a plastic working technique, deformation resistance occurring in plastic working is reduced and stable high precision plastic working is enabled at lower temperatures. One or more t...	10/30/2001
6235128	Carbon and alloy steels thermochemical treatments The present invention is a unique sequential process for treating carbon and alloy steels to improve resistance to tribological stresses while reducing conventional processing time required to obtain articles having a similar hardness. This process compri...	05/22/2001
6197125	Modification of diffusion coating grain structure by nitriding A method for improving the corrosion resistance, increasing the hardness, providing superior ductility, and reducing surface-cracking of a diffusion coating by nitriding and heating-treating the diffusion coating is disclosed. The nitriding and heat-treat...	03/06/2001
6051080	Rolling element used for toroidal-type continuously variable transmission and method for producing same The invention relates to a power roller used for a toroidal-type continuously variable transmission. This power roller has on its first side a groove for receiving a bearing, and the surface of the groove (bearing surface) has a carbon concentration which...	04/18/2000
5916383	Method of shot peening a hardened metal product with shot having high hardness A method for shot peening a hard metal product that has a hardened surface. The method includes projecting shot on the hardened surface of the hard metal product. The ratio of the Vickers hardness of the shot to that of the hardened surface is 0.8-1.6, an...	06/29/1999
5810947	Method of surface modification for tool steels The adhesive strength and hardness of chromium nitride(CrN) film deposited on SKD 61 tool steel was significantly enhanced by a nitriding process on the surface the tool steel before coating with a CrN film. These nitriding processes included nitrocarburi...	09/22/1998
5785771	Method for manufacturing precision gears A method for manufacturing precision gears (10) including an initial step of providing a shaped workpiece (30S) defining a plurality of gear teeth (12) and, furthermore, defining a tooth space surface (68) defined by and between adjacent gear t...	07/28/1998
5718774	Method of producing bevel gear A method of producing a bevel gear is provided. The method comprises the steps of forging, from a case hardened and heated blank, a rough shaped bevel gear intermediate product having a toothed portion, outer burrs at a larger diameter end thereof and bet...	02/17/1998
5714015	Ferritic nitrocarburization process for steel balls A nitrocarburization treatment for steel components, such as steel balls or ball bearings is disclosed. In the process, the balls are treated in a nitrocarburizing environment and then reoriented, either inside or outside of that environment to form an ep...	02/03/1998
5707460	Method of producing parts having improved wear, fatigue and corrosion resistance from medium alloy, low carbon steel and parts obtained therefrom Improved corrosion, wear and fatigue resistance is provided for pieces formed of medium alloy, low carbon steel by subjecting the piece to a treatment process which includes a step of carburizing, followed by nitriding. The process is especially useful fo...	01/13/1998
5573604	Process for manufacturing a turbine blade made of an (alpha/beta)-titanium base alloy The process serves for the manufacture of an erosion-resistant turbine blade which is preferably used in the low-pressure stage of a steam turbine and is made of a vanadium-containing (଱/ଲ)-titanium base alloy. This involves the formation, by ...	11/12/1996
5525165	Method of surface modification of titanium alloy A cyaniding process, operating in a molten cyanide salt, and a nitriding process, operating in a Tufftride salt bath, can be utilized to modify the near-surface microstructure of Ti-6Al-4V alloy. The surface-hardened layers have been characterized with re...	06/11/1996
5372654	Steel sheet for press working that exhibits excellent stiffness and satisfactory press workability The present invention provides a steel sheet for press working that exhibits excellent stiffness and satisfactory press workability. The steel sheet for press working includes: a composition of C+N+B=0.007 to 1.0 wt % in a region from the surface of the s...	12/13/1994
5288340	Method of improving the corrosion resistance of carbonitrided components made of ferrous materials In order to improve the corrosion resistance, carbonitrided components formed of ferrous material are treated, after an oxidation treatment, with a solution of a heat hardenable organic synthetic resin and heat-treated at 80° to 200° C....	02/22/1994
5252146	Coat-nitrocarburizing of irons and steels A process for nitrocarburizing ferrous materials, and the product thereof is described. Material to be treated is packed in a container with a triazine polymer, preferably melone, melem or melam and heated to 500°-900° C. for up to 120 minutes. After tr...	10/12/1993
5085714	Method of manufacturing a steel sheet A method of manufacturing steel sheets by applying continuous annealing after applying hot rolling or hot rolling and cold rolling by a customary method to steel material, containing less than 0.007% of C, less than 0.1% of Si, from 0.05 to 0.50% of Mn, l...	02/04/1992
5019182	Method of forming hard steels by case hardening, shot-peening and aging without tempering A method of manufacturing a steel member comprising the steps of: carburizing and quenching or carbo-nitriding and quenching a steel material; shot-peening the steel material quenched in the first step without tempering; and aging the steel material shot-...	05/28/1991
4881983	Manufacture of corrosion resistant components A steel component is provided with a black wear and corrosion resistant finish by the steps of forming an epsilon iron nitride or carbonitride layer, bringing the component to gas oxidation temperature and oxidizing by a gaseous medium to form a dense bla...	11/21/1989
4857119	Case-Hardened plate armor and method of making Case-hardened plate armor disclosed includes a steel plate (14,18) that is heat treated to provide carbonitride surfaces and a tough, ductile core, with the carbonitride surfaces having a toughness of at least 66, and preferably at least 67, on the Rockwe...	08/15/1989
4596610	Hardening metal parts To harden individual metal parts in a continuous low-energy heat treatment process consisting of clearly separate stages, the part to be heated is placed in a sealed heat treatment box consisting of two layers of porous material separated by a gas-tight b...	06/24/1986
4531985	Surface treatment of metal rings A metal ring of generally rectangular cross-section has its radially outer surface and its side surfaces treated by being stacked with its sides in contact with other rings in a chamber. Air is excluded from the chamber and a gaseous mixture of a carburiz...	07/30/1985
4470854	Surface hardening thermal treatment A steel product, particularly a heavy-duty gear, having a case of martensite and a core of lower bainite with a Vickers hardness of not less than Hv 600 is obtained by subjecting a medium carbon alloy steel comprising, by weight, 0.45 to 0.60% C, up to 0....	09/11/1984
4406714	Heat treatment of metals Ferrous metal is treated by austenitic nitro-carburizing in a heat treatment furnace. A suitable atmosphere is created by admitting to the furnace nitrogen; ammonia; and a liquid or vaporous organic compound of carbon, hydrogen and oxygen. The atmosphere ...	09/27/1983
4366008	Method for hardening steel A method of hardening steel so that it may have a surface layer with sufficient hardness to permit fabrication into machinery parts with a minimum of strain developed therein. The method comprises heating steel at a temperature in a range not lower than 1...	12/28/1982
4119443	Method for manufacturing hardened machined parts Hardened machined parts are manufactured from rolled or forged steel which consists essentially of 0.05 to 0.15 wt % of C, up to 0.50 wt % of Si, up to 1.5 wt % of Mn, 0.30 to 1.0 wt % of Cr, 0.50 to 1.0 wt % of Mo, one or more of elements selected from t...	10/10/1978
4038109	Three phase heat treatment of steel sheet A medium-hard to hard thin steel sheet and a strip cut or stamped therefrom, both having an increased fatigue strength, are prepared by cold rolling a soft steel sheet, carburizing or carbo-nitriding the soft thinned sheet until a medium-hard to hard thin...	07/26/1977

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Class 148/219 - With working, machining, cutting, or post-carburizing and post-nitriding heating or quenching