Class 148/646 - With restraining of metal from expanding or contracting during heating or cooling

Subclass of Class 148 - Metal treatment
Definition: Process wherein the expansion or contraction of the metal
No. of patents: 32
Last issue date: 05/15/2012

Number	Title	Issue Date
8177928	Method of restrained-quenching of annular member A method of restrained-quenching of an annular member, that can readily ensure a sufficient effect of restraint, increase treatment efficiency of a quench hardening treatment, and suppress production cost of the annular member, includes a heating step, a first cooli...	05/15/2012
7718017	Method for the monobloc sizing for the tempering casings and device for implementing the method A method of sizing a cylindrical part following shaping, by plastic deformation, of a metallic material that has maximum structural shrinkage at a maximum-shrinkage temperature between a first temperature and a second temperature, which is lower than the first tempe...	05/18/2010
7686900	Method for boltless heat treatment of thin flanges A method for preventing distortion in a flange of a metal part during heat treatment is provided. A method of preventing distortion includes engaging a bottom surface of the flange with a first boltless ring, engaging a top surface of the flange with a second boltle...	03/30/2010
7361015	Clamp device and clamp method for heat-treated article A heat treatment operation can be executed, suppressing a wave-shaped deformation at a non heat-treatment region of an article to be heat treated. To an elongated-shaped article to be heat treated to which a raised portion extending in the longitudinal direct...	04/22/2008
7250133	Device for use when hardening A device for use when hardening includes fixture parts (1, 4, 6) between which a workpiece is fixed during hardening. The device's fixture parts (1, 4, 6) are three or more so that two or more workpieces are fixed simultaneously in the device. ...	07/31/2007
7060221	Hardening fixture Hardening fixture for simultaneous hardening of a multitude of sawblades, comprising a bottom plate against which the lower ends of the sawblades are supported, vertical pillars and side plates with lateral openings, where guiding strips and distance elements keep t...	06/13/2006
7055235	Sleeve for connector of optical fibers and method of manufacturing same A process of manufacturing a sleeve for connector of optical fibers comprises shaping a member made of stainless steel into a hollow cylinder, forming at least one portion to be heated on an outer circumferential surface of the cylinder, inserting a cylindrical rod ...	06/06/2006
6960274	Tooling and method of manufacturing a mesh laminate An apparatus and method of manufacturing a wire mesh laminate includes wrapping a central core with multiple layers of mesh screen and a barrier layer having a higher melting point than the mesh screen to form a spool assembly. The spool assembly is then surrounded ...	11/01/2005
6918224	Heat treatment strategically strengthened door beam A method of forming a vehicle component, particularly an elongated impact beam, having an open section structure, in a manner to provide predetermined strategically strengthened portions, comprising the steps of cold forming unhardened steel into a workpiece having ...	07/19/2005
6585834	Method for performing a heat treatment of metallic rings, and bearing ring thus obtained A method of performing a heat treatment on steel rings, in particular for bearings, whereby the outer surface and inner surface of a preheated ring are exposed to different flows of a cooling medium such that the regions of the ring adjacent those surface...	07/01/2003
6488791	Method for strengthening a steel channel member A conventional steel C-channel used as a side rail in a truck frame is strengthened by forming, after heat treating, strengthening lips on the edges of the C-channel flanges while the C-channel is still hot from the final tempering step of the heat treati...	12/03/2002
6432230	Process and device for hardening a rail Process and device for hardening a rail. The process for hardening a rail or part thereof by transforming it from an austenitic structure into a different microstructure that is stable at room temperature comprises aligning, horizontally positioning, and ...	08/13/2002
6328829	Constrained hardening method and apparatus for deformed bar workpieces Hardening is accomplished by heating a longitudinal section of a workpiece such as an odd-shaped bar, and by quenching while constraining the workpiece section in dies. The quenching is executed while the workpiece is pressed in a direction perpendicular ...	12/11/2001
6241832	Method for creep-sizing annular-shaped structures and device therefor A method and device for thermal creep-sizing an annular-shaped structure. The creep-sizing device includes a ring member with through-holes present between the inner and outer diametrical boundaries of the ring member, and with through-slots alternatingly...	06/05/2001
6210500	Method of heat treat hardening thin metal work pieces A heat treat fixture is provided for supporting thin sheet-like work pieces, such as metal gasket layers, during heat treatment to achieve uniform hardness and properties of the work piece while preventing warpage. The fixture has porous, planar support w...	04/03/2001
6153026	Method and device for temper-hardening flat metal products The invention discloses a method for temper hardening flat metal products, comprising the following steps: introducing a flat product coming out of the furnace into a temper-hardening bay, depositing this flat product on supporting elements forming a lowe...	11/28/2000
6077369	Method of straightening wire rods of titanium and titanium alloy A method of straightening a wire rod of titanium or titanium alloy wherein the rod is hot-straightened to a straight rod at the straightening temperature T and elongation &3xb5; satisfying the expression (1) or (2). The method includes hot rolling a titan...	06/20/2000
6063216	Working of a metallic strip This invention relates to the working of a metallic strip. More particularly, the invention relates to a method of working a length of metallic strip by heat treating under tensile force, to a length of metallic strip and to an apparatus for use in workin...	05/16/2000
5972134	Manufacture of a metallic molded structural part The invention is directed to a process for the manufacture of a metallic molded structural part (1) for motor vehicle components such as door impact girders or bumpers with areas (2) with a higher ductility in relation to the rest of the structural compon...	10/26/1999
5968293	Method and apparatus for heat treating and straightening structural members An apparatus (20) for induction heat treating, restraint quenching, and straightening an associated carbon steel truck structural member (30), having a web (32) and at least one flange (34) substantially perpendicular thereto, comprises a heat treating ap...	10/19/1999
5885522	Method and apparatus for heat treating and straightening structural members An apparatus (20) for induction heat treating, restraint quenching, and straightening an associated carbon steel truck structural member (30), having a web (32) and at least one flange (34) substantially perpendicular thereto, comprises a heat treating ap...	03/23/1999
5492308	Constrained quenching apparatus and heat treatment apparatus A constrained quenching apparatus is provided for hardening a workpiece such as an asymmetrical bar which has a notable tendency to warping when quenched, without warping the workpiece. The apparatus comprises a set of two or more dies having plural proje...	02/20/1996
5316269	Leaf spring constraining apparatus Disclosed is a constraining apparatus, for constraining cambered leaf spring blanks when they are quenched in an quenching oil in the oil tank of a quenching systems so as to prevent any possible distortion in the directions of the thickness and width of ...	05/31/1994
4761191	Method of forming closely sized openings A method of forming precision openings in hardened steel workpieces is disclosed. The method generally includes drilling nominal size openings in the workpiece while it is in a soft condition. Thereafter, sizing plugs formed from a material having a stren...	08/02/1988
4444604	Method of preventing distortion of a heated workpiece during cooling A method is provided for preventing distortion of a heated cylindrical metal workpiece during cooling. The method includes heating the workpiece and then placing a fixture substantially at room temperature in the workpiece. The fixture has a plurality of ...	04/24/1984
4422884	Method of treating a continuously cast strand formed of stainless steel A method of treating a continuously cast strand formed of stainless steel, wherein, prior to cutting the strand, the surface layer of the strand is deformed at oppositely situated sides by oppositely situated rollers of at least one pair of rollers and su...	12/27/1983
4419149	Method for quenching heated workpieces A method and apparatus for quenching heated elongated workpieces by rotatably mounting the heated workpiece in a quench tank and subsequently rapidly flooding the tank with a quenching liquid. The heated workpiece is mounted within the quench tank by enga...	12/06/1983
4394194	Method for heat treating structural members The present invention relates generally to an improved method and apparatus for induction heat treating and restraint quenching structural members of carbon steel, to a uniform martensitic structure, such that distortion of the member due to rapid quenchi...	07/19/1983
4376662	Methods for fabricating metallic workpieces Methods for fabricating metallic components in which expansion of a mandrel and changes that take place in the workpiece material during precipitation hardening--phase changes, volume contraction, and increased ductility--are utilized to size the componen...	03/15/1983
4210843	Color CRT shadow mask and method of making same This disclosure depicts an improved method of making a color CRT shadow mask. The improved method comprises providing a plurality of shadow mask blanks each with a pattern of apertures photoetched therein, which blanks have been cut from a foil of steel, ...	07/01/1980
4142923	Method of induction heat treating, quenching and tempering, of structural members This invention relates to a method of induction heat treating and restraint quenching structural members, particularly those of low carbon alloy steel (lean content), to a uniform martensitic structure, such that distortion of the member due to rapid quen...	03/06/1979
3972744	Method of and means for making lightweight, low cost impact resistant bumpers Bumper bars are shaped from easily workable relatively thin gauge sheet or strip steel into bumper bar shell profile provided with a horizontally elongated body portion and spaced apart integral upper and lower flanges of substantial width extending freel...	08/03/1976

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Class 148/646 - With restraining of metal from expanding or contracting during heating or cooling