Class 148/224 - Utilizing wave energy (e.g., laser, etc.) or electric heating with work as conductor

Subclass of Class 148 - Metal treatment
Definition: Process under 206 which uses wave energy (e.g., laser, etc.)
No. of patents: 19
Last issue date: 11/24/2009

Number	Title	Issue Date
7622009	Steel material A raw steel is coated with or surrounded by a boron compound (step S1). A coating film of h-BN is formed on the surface of the raw steel. Then, the raw steel is nitrided by a nitriding gas while being heated (step S2). B from the boron compound and N f...	11/24/2009
6454877	Laser phase transformation and ion implantation in metals 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 particularly useful ...	09/24/2002
6174388	Rapid infrared heating of a surface 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 remains unchanged....	01/16/2001
6143095	Method for surface-alloying on metal or alloy substrates, or for surface-repairing the damaged (or failed) metal or alloy substrates using a laser beam 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 beam to form an alloy...	11/07/2000
5882438	Method for the formation of a frangible zone for the fracture separation of a machine part, in particular, a connecting rod for internal combustion engines 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 is formed along a s...	03/16/1999
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
5413641	Laser nitriding an element made of titanium alloy by blowing nitrogen and inert gas 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 the impact zone of...	05/09/1995
5411770	Method of surface modification of stainless steel The surface of stainless steel can be hardened by coating a silicon nitride gel and then scanning by CO2 laser to form a surface alloy layer thereon. The thickness and hardness of the surface alloy layer are both uniform. The Vicker's hardness ...	05/02/1995
5405456	Process of surface hardening for titanium alloy by molten salt carburization Disclosed is a process of surface hardening for titanium alloys comprising ଱ 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 within the effec...	04/11/1995
5294264	Method of nitriding refractory metal articles 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 into the microwave ov...	03/15/1994
5154779	Method of nitriding, carburizing, or oxidizing refractory metal articles using microwaves 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 or metalloid artic...	10/13/1992
5032192	Production method for a vehicular endless track bushing 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-heated from an outs...	07/16/1991
4942059	Method for hardfacing metal articles 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 hardface coating is ...	07/17/1990
4858294	Method of producing an object, in particular a rolling bearing, consisting of at least two moving parts locked into each other 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 least one row of ...	08/22/1989
4527987	Sprocket wheel and method of making same 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, 0.5 to 2.2% by weight nickel, up to 0.4...	07/09/1985
4451302	Aluminum nitriding by laser 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 0.1×106 W/cm2	05/29/1984
4394234	Method of processing electrically conductive material by glow discharge 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 according to the posit...	07/19/1983
4173501	Steel torsional element and method for making 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 first depth to provi...	11/06/1979
4087295	Mechanical and thermal treatment of steel wire 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, austenitizing and simu...	05/02/1978

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Class 148/224 - Utilizing wave energy (e.g., laser, etc.) or electric heating with work as conductor