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6454877 |
A method and apparatus are provided for treating the surface of a metal body through phase transformation, ion implantation, and/or diffusion and to form new phases of metallic materials. The method and apparatus have been shown to be pa...
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6174388 |
High energy flux infrared heaters are used to treat an object having a surface section and a base section such that a desired characteristic of the surface section is physically, chemically, or phasically changed while the base section r...
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6143095 |
The present invention is related to the method for surface-alloying comprising the steps of: (a) plating alloying ingredients on the surface of metal or alloy substrate to form plated layer, and (b) melting this surface using a laser bea...
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5882438 |
For a method for the formation of a frangible zone for fracture separation of a part, namely a connecting rod for internal combustion engines, by which method, in a fracture plane for the intended triggered break-away, a frangible zone i...
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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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5413641 |
A method of nitriding a piece made of titanium alloy, in which a laser beam is directed onto the piece to obtain a small amount of surface melting in the impact zone of the laser, nitrogen under high pressure is blown immediately behind ...
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5411770 |
The surface of stainless steel can be hardened by coating a silicon nitride gel and then scanning by CO 2 laser to form a surface alloy layer thereon. The thickness and hardness of the surface alloy layer are both uniform. The Vicker's ...
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5405456 |
Disclosed is a process of surface hardening for titanium alloys comprising α phase by carburization in a molten salt which consists of carbonate as the carbon-yielding agent with electrolysis within 790° C. to 930° C. The hardness wit...
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5294264 |
A method of nitriding a refractory-nitride forming metal or metalloid articles and composite articles. A consolidated metal or metalloid article or composite is placed inside a microwave oven and nitrogen containing gas is introduced int...
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5154779 |
A method of nitriding an article of refractory-nitride-forming metal or metalloids. A consolidated metal or metalloid article is placed inside a microwave oven and nitrogen containing gas is introduced into the microwave oven. The metal ...
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5032192 |
A production method for an endless track bushing wherein medium-carbon steel is selected as a bushing material, the bushing material is carburized, quench-hardened, and then tempered. In the quenching, the bushing material is induction-h...
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4942059 |
The present invention provides a method for applying a hardface alloy coating on a metal substrate concurrently with a nitriding procedure so that the hardface coating is deposited and nitrided in one step. The deposition of the metal ha...
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4858294 |
A method of producing an object of at least two parts movable relative to each other, one of which parts is essentially locked inside the other, and wherein a rolling bearing is disposed, between the two parts in races, which includes at...
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4527987 |
A sprocket wheel for mining applications comprises a forged, austenitized and oil-quenched body which consists essentially of: 0.7 to 1.0% by weight manganese, 0.7 to 2.2% by weight chromium, 0.3 to 0.6% by weight molybdenum, ...
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4451302 |
Nitriding a workpiece of aluminum or aluminum alloy by laser treatment in an atmosphere rich in nitrogen is disclosed. Laser treatment is applied for a period of less than one second at a laser power density of at least 0.1×10 6 W/cm 2...
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4394234 |
A glow discharge surface treatment process wherein only the selected portions of a workpiece adjacent to or surrounded by the associated secondary electrodes are surface-treated so as to provide different treatments on the workpiece acco...
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4173501 |
A steel torsional element includes a first or shaft portion for transmitting torque and a second portion, such as a gear, for transferring torque to another machine element. The entire torsional element is carburized and quenched to a fi...
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4087295 |
A process is described whereby steel wire is made into killed twisted strand or cord having essentially no retained tensile, bending or torsional stresses which comprises twisting a plurality of steel wires to form a strand or cord, aust...
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3922181 |
A method of hardening hypereutectoid steels having less than about 10 percent total alloy content is described which results in a structure with an ultra-fine grain size (finer than ASTM No. 10) and a natural dispersion of very small exc...
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3885996 |
A method of making a ball stud in which a low carbon steel or a low carbon alloy steel is used as a starting material, the material is coldly formed into the ball stud, a lower carbon content and smaller carburization depth are selected ...
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3790413 |
A heat treating process for a link chain or a similar article, characterized wherein a link chain or a similar article is conveyed through a high frequency induction coil and simultaneously heated at an elevated temperature, and is then ...
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3421953 |
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3357869 |
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3353247 |
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3277267 |
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3259527 |
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3208885 |
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3194694 |
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2844498 |
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2575427 |
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2465864 |
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2457651 |
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2400893 |
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2174867 |
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2041769 |
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1999757 |
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1953647 |
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1929392 |
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1907183 |
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1837272 |
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1498519 |
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1350483 |
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3553038 |
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1054817 |
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0966121 |
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0899452 |
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0876862 |
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0872755 |
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