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 > Carburizing or nitriding using externally supplied carbon or nitrogen source > Iron(fe) or iron base alloy > Utilizing agent containing cyano (cn) radical or halogen (x) radical or metal carbonate > Patents

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Class Information
Number: 148/234
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 > Carburizing or nitriding using externally supplied carbon or nitrogen source > Iron(fe) or iron base alloy > Utilizing agent containing cyano (cn) radical or halogen (x) radical or metal carbonate
Description: Process which utilizes at any stage an agent containing a cyano (CN) radical or halogen (X=Fluorine, Chlorine, Bromine or Iodine) radical or a metal carbonate.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
7559995	Method for heat treatment of metal workpieces as well as a heat-treated workpiece	Jul. 14, 2009
6663724	Molten salt composition for use in manufacturing laminated rings	Dec. 16, 2003
5753052	Method of treating ferrous surfaces subjected to high friction strains	May. 19, 1998
5346560	Process for the treatment of ferrous metal parts to improve their corrosion resistance and friction properties simultaneously	Sep. 13, 1994
5252145	Method of nitriding nickel alloy	Oct. 12, 1993
5194097	Method of nitriding steel and heat treat furnaces used therein	Mar. 16, 1993
4563223	Corrosion resistant steel components and method of manufacture thereof	Jan. 7, 1986
4016012	Method for surface treatment of metallic materials	Apr. 5, 1977