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7438769 |
A method for diffusing titanium and nitride into a base material having a coating thereon using conventional surface treatments or coatings. The method generally includes the steps of providing a base material having a coating thereon; p...
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6966954 |
A roller bearing that provides ball and roller bearing elements comprised of M50 steel and M50NiL steel having surface hardnesses above 60 HRC, and in the range of 65-72 HRC. The hardness in the surface region is achieved by nitriding th...
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6878218 |
A high strength gear is provided which comprises a base metal of an iron-base alloy, the base metal being carburized or carbonitrided and having a tooth surface, and a coating containing Fe nitride and/or Fe carbonitride, formed on the t...
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6663724 |
A laminated ring for use as a belt in transmitting power in a continuously variable transmission is produced by welding opposite ends of a sheet of maraging steel to produce a plurality of rings, and rolling said rings to a predetermined...
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6379473 |
A laminated ring for use as a belt in transmitting power in a continuously variable transmission is produced by welding opposite ends of a sheet of maraging steel to produce a plurality of rings, and rolling said rings to a predetermined...
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6361621 |
The production of grain-oriented electrical steel sheets is disclosed wherein grain growth in the steel is inhibited by a method comprising the regulation of the content of sulfur and manganese in the steel strp and the cold rolled strip...
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6361620 |
In the production of grain-oriented electrical steel strip, the grain growth inhibition is controlled by balancing the copper, aluminum and carbonium content in order to control the type and quantity of precipitated second phases and obt...
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6325866 |
A process for the production of grain oriented silicon steel sheet which provides an optimization of the production of conventional, grain oriented silicon steel strips, by the use of an appropriate synergistic combination of the composi...
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6284062 |
A member used in contact with a hot dip galvanizing bath, such as a sinker roll, a support roll or a bearing, is produced by nitriding stainless steel to form a nitride layer and a nitrogen-diffused layer on the surface thereof. The memb...
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6180189 |
The invention relates to a method for aluminum nitride coating of cylinder contact surfaces (ZL) of a crankcase (KG) made of an aluminum basic alloy where the aluminum nitride coating is performed by surface nitriding of the aluminum bas...
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6179932 |
A motor rotary shaft according to the present invention is constructed only at the surface layer of a journal portion with a hard nitride layer, so that the resultant motor rotary shaft is available at a low cost, not so heavy and excell...
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6007871 |
The object of the present invention is to provide a simple, inexpensive method of surface treatment capable of improving the strength and smoothness of fishing tackle parts made of alloy steel containing chrome. The method of surface tre...
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5846340 |
Process for the preparation of a heat treatment atmosphere by a catalytic reaction in a catalytic reactor including an inlet and an outlet between a first gas mixture comprising oxygen and a second gas mixture comprising a hydrocarbon fo...
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5735970 |
The process and system according to the present invention are used for the production of an atmosphere. The process involves feeding an impure nitrogen stream, combined with a hydrocarbon to a catalytic reactor having a non-noble metal c...
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5650022 |
A method of nitriding steel which comprises reacting the steel surface with nitrogen so as to form a hard nitrided layer, and, prior to nitriding, holding steel under a gas atmosphere containing fluorine compound gas or fluorine gas and ...
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5599404 |
A substrate material to be coated with either a nitride, carbide, or oxide contains a small percent of a specific reactive element, like titanium, which forms very stable nitrides, carbides, or oxides. The material also contains larger p...
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5342455 |
A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in a continuous fu...
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5340412 |
An austenitic stainless steel screw having a nitride hard layer on its surface to prevent corrosion on parts of the screw such as a screw head which is in contact with the environment by removing a portion of the nitride hard layer to ex...
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5259893 |
A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals, sealing glass to metals, and sintering metal and ceramic powders in a continuous fu...
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5254181 |
This invention relates to a method for forming a uniform, deep nitride layer on and in steel works at low cost, wherein a steel work is fluorided in heated condition in an atmosphere of a mixed gas composed of fluorine gas and inert gas ...
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5252145 |
A method of nitriding nickel alloy comprising steps of holding nickel alloy in an atmosphere of fluorine- or fluoride-containing gas in a heated condition and holding the fluorinated nickel alloy in a nitriding atmosphere in a heated con...
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5242509 |
The thermal treatment atmosphere is obtained by catalytic reaction of an impure mixture of nitrogen, advantageously obtained by permeation or adsorption, and hydrocarbon, the catalytic reaction being carried out at a temperature between ...
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5226975 |
A method of forming a wear-resistant coating for internal combustion engine component parts which allows the part to remain dimensionally stable under severe engine operating conditions is provided. The coating is formed by a two step me...
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5221369 |
A process for generating in-situ low-cost atmospheres suitable for annealing and heat treating ferrous and non-ferrous metals and alloys, brazing metals and ceramics, sealing glass to metals, and sintering metal and ceramic powders in a ...
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5013371 |
Steel is nitrided first by treating the steel to be nitrided with NF 3 at elevated temperature to form a fluorinated layer on the steel, and then the steel is nitrided by heating in a nitriding atmosphere.
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4119444 |
A method of nitriding metal parts is disclosed. A preferred mode requires burying the metal part to be treated in a body of vermiculite or other porous media containing urea or other suitable nitriding agent. Prior to burying, a controll...
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3904448 |
In the course of the reduction of metal salts powder such as a ternary oxalate of Fe, Co and Ni by heating in a reducing atmosphere, a nitrogen-containing compound gas such as NH 3 is introduced into the reaction system atmosphere in or...
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3384455 |
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3232797 |
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3180726 |
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2993467 |
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2578197 |
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2472320 |
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2057274 |
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2016477 |
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2001134 |
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1965798 |
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1949682 |
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1936294 |
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1920368 |
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1909669 |
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1808355 |
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1793309 |
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1772866 |
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RE03920 |
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0060823 |
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