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Class Information
Number: 148/660
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 > Including cooling (e.g., quenching, etc.)
Description: Process which includes a cooling step (e.g., quenching, etc.).

Sub-classes under this class:

Class Number Class Name Patents
148/662 Heating step follows cooling 44
148/664 Multiple cooling steps 60
148/661 Strip, sheet, or plate 134

Patents under this class:
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Patent Number Title Of Patent Date Issued
8691030 Low alloy steels with superior corrosion resistance for oil country tubular goods Apr. 8, 2014
8668789 Method for manufacturing of high strength cold rolled steel sheet of excellent phosphatability Mar. 11, 2014
8634953 Method and equipment for flatness control in cooling a stainless steel strip Jan. 21, 2014
8501083 Spray quench systems for heat treated metal products Aug. 6, 2013
8404062 Device and method for cooling hot strip Mar. 26, 2013
8109283 Apparatus and process for the dry removal of the scale found on the surface of the metal products Feb. 7, 2012
8075714 Localized induction heating for residual stress optimization Dec. 13, 2011
8043086 Method and device for cooling or quenching slabs and sheets with water in a cooling pond Oct. 25, 2011
7815757 Water-cooling method of steel material Oct. 19, 2010
7767044 Method for heat-treating steel material Aug. 3, 2010
7718018 Method of cooling steel plate May. 18, 2010
7713362 Method for making an abrasion resistant steel plate and plate obtained May. 11, 2010
7704338 Method of manufacturing a martensitic stainless steel Apr. 27, 2010
7520946 Apparatus and process for the dry removal of the scale found on the surface of metal products Apr. 21, 2009
7462251 Method for making an abrasion-resistant steel plate Dec. 9, 2008
7459041 Method for making an abrasion-resistant steel plate Dec. 2, 2008
7459040 Method for making a steel article with carbides already in the steel and no deformation used in the process Dec. 2, 2008
7214278 High-strength four-phase steel alloys May. 8, 2007
7118637 Nano-composite martensitic steels Oct. 10, 2006
7074286 Wrought Cr--W--V bainitic/ferritic steel compositions Jul. 11, 2006
7037383 Process for producing a component from metal May. 2, 2006
6899773 Fine-grained martensitic stainless steel and method thereof May. 31, 2005
6896746 Hot-rolled steel wire rods and bars usable for machine structural use without annealing and method for producing the same May. 24, 2005
6890665 Martensitic stainless steel and method for manufacturing the same May. 10, 2005
6890393 Fine-grained martensitic stainless steel and method thereof May. 10, 2005
6863749 Method of improving the toughness of low-carbon, high-strength steels Mar. 8, 2005
6837948 Process of production of compressor shoe Jan. 4, 2005
6827797 Process for making triple-phase nano-composite steels Dec. 7, 2004
6764560 Method of forming cast alloys having high strength and plasticity Jul. 20, 2004
6755920 Low-alloy heat-resistant steel, heat treatment method therefor, and turbine rotor comprising the same Jun. 29, 2004
6723188 Steel workpiece oil quenching method Apr. 20, 2004
6689234 Method of producing metallic materials Feb. 10, 2004
6689227 Eco-friendly starch quenchants Feb. 10, 2004
6648997 Quenching method Nov. 18, 2003
6632303 Stress relieved grinding ball having hard outer shell Oct. 14, 2003
6554926 Quenching heated metallic objects Apr. 29, 2003
6471798 Method and apparatus for heat treating steel Oct. 29, 2002
6451137 Method of quenching after a low-pressure carburization Sep. 17, 2002
6387195 Rapid quench of large selection precipitation hardenable alloys May. 14, 2002
6383297 Method and device for joint oxydation and heat treatment of workpieces May. 7, 2002
6364974 Quenching apparatus and method for hardening steel parts Apr. 2, 2002
6280685 Tool steel composition Aug. 28, 2001
6273968 Low-carbon steels of superior mechanical and corrosion properties and process of making thereof Aug. 14, 2001
6206983 Medium carbon steels and low alloy steels with enhanced machinability Mar. 27, 2001
6203634 Method for heat-treating steel or cast iron components Mar. 20, 2001
6200395 Free-machining steels containing tin antimony and/or arsenic Mar. 13, 2001
6174384 Medium-carbon steel having dispersed fine graphite structure and method for the manufacture thereof Jan. 16, 2001
6132534 Liquid quenching apparatus and method Oct. 17, 2000
6099666 Variable cooling rate quench method and apparatus Aug. 8, 2000
6060180 Alloy having high corrosion resistance in environment of high corrosiveness, steel pipe of the same alloy and method of manufacturing the same steel pipe May. 9, 2000

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