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7384488 |
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, 0.01...
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7112248 |
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 he...
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6858096 |
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 ...
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6656293 |
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 sur...
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6623567 |
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 subsequen...
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6454880 |
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 ...
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6447619 |
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 ...
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6423158 |
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 wh...
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6309475 |
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 temperatu...
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6235128 |
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. T...
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6197125 |
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 nitrid...
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6051080 |
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 c...
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5916383 |
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 surf...
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5810947 |
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 inc...
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5785771 |
A method for manufacturing precision gears (10) including an initial step of providing a shaped workpiece (30 S ) defining a plurality of gear teeth (12) and, furthermore, defining a tooth space surface (68) defined by and between adjace...
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5718774 |
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 e...
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5714015 |
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 environ...
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5707460 |
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 es...
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5573604 |
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 (α/β)-titanium base alloy. This involves the format...
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5525165 |
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 cha...
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H001512 |
A method of hardening and flattening a viscous coupling plate generally combining a heat treatment process followed by roller leveling is disclosed. The heat treatment process produces an epsilon iron nitride surface layer of the desired...
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5372654 |
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 th...
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5288340 |
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.
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5252146 |
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...
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5085714 |
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...
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5019182 |
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 st...
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4881983 |
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 t...
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4857119 |
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...
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4596610 |
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 separate...
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4531985 |
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 mix...
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4470854 |
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...
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4406714 |
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 oxyge...
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4366008 |
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 rang...
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4119443 |
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 elemen...
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4038109 |
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...
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3357869 |
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3228807 |
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3158514 |
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3009843 |
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2048748 |
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1975058 |
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1724552 |
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1724551 |
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3673008 |
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