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Class Information
Number: 148/627
Name: Metal treatment > Process of modifying or maintaining internal physical structure (i.e., microstructure) or chemical properties of metal, process of reactive coating of metal and process of chemical-heat removing (e.g., flame-cutting, etc.) or burning of metal > Heating or cooling of solid metal > Iron(fe) or iron base alloy > Treating with specified agent (e.g., heat exchange agent, protective agent, decarburizing agent, denitriding agent, etc.) or vacuum > With localized or zone heating or cooling
Description: Process wherein a heating or cooling operation is applied to a discontinuous area of the metal workpiece to provide treatment limited to one or several local areas or zones and not to other adjacent areas.

Patents under this class:

Patent Number Title Of Patent Date Issued
7947218 Apparatus and method for coil cooling May. 24, 2011
7678208 Method of hot stamping and hardening a metal sheet Mar. 16, 2010
7540993 Continuous process for production of steel part with regions of different ductility Jun. 2, 2009
6921444 Method of locally heating a part to reduce strength and increase ductility for subsequent manufacturing operation Jul. 26, 2005
6434949 Method and treatment device for the cooling of highly heated metal components Aug. 20, 2002
6074496 High-strength oil-tempered steel wire with excellent spring fabrication property and method for producing the same Jun. 13, 2000
5798007 Process and apparatus for the continuous heat treatment of a metal strip travelling in a different atmosphere Aug. 25, 1998
5614039 Argon employing heat treating process Mar. 25, 1997
5248354 Method for the preparation of a body of austempered ductile cast iron Sep. 28, 1993
5246510 Method for producing a selectively surface hardened cast iron part Sep. 21, 1993
5213638 Surface modified copper alloys May. 25, 1993
4596615 Method of cooling hot steel plates Jun. 24, 1986
4429245 External rotor production for synchronous hysteresis motor Jan. 31, 1984
4405380 High strength, low alloy steel with improved surface and mechanical properties Sep. 20, 1983
4323404 Method for providing single piece with plural different mechanical characteristics Apr. 6, 1982
4313771 Laser hardening of steel work pieces Feb. 2, 1982
4268246 Method and apparatus for metal object heat treatment May. 19, 1981
4035202 Annealing treatment for controlling warhead fragmentation size distribution Jul. 12, 1977

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