Patent GB-1004836-A (GB)
Title: Improvements relating to the cold-working of metals
IPC: B21J5/00
Filed: 1962-06-05
Abstract: A process for cold working metal comprises lubricating a metal (e.g. steel, chrome-nickel alloys, titanium and zirconium) by coating with a metal-free dispersion or solution (as defined) containing a cellulose ether (e.g. methyl, carboxymethyl, ethyl, methylethyl, hydroxyethyl, ethylhydroxyethyl and benzyl celluloses) and then subjecting the metal to cold working.  By metal-free solutions or dispersions is meant solutions or dispersions in which there is no elemental metal present as opposed to dissolved metal ions and in which there is no molybdenum disulphide.  The coating may be applied by flooding, dipping or spraying to a cleaned surface and dried, e.g. by heat. The solvents mentioned are water, chlorinated hydrocarbons (methylene chloride and tri- and per-chloroethylene), alcohols (isopropanol), esters, ketones and aromatic hydrocarbons. Phosphoric acid or ester thereof (e.g. trichloroethyl phosphate) may be included in the dispersion or solution. The metal may be treated with a mineral oil before cold working.  Other compounds which may be included in the coating composition are polychloroprene, plasticisers (dioctyl sebabate and trichloroethyl phosphate), an alkyd resin modified with a fatty acid, polybutene, polyethylene, natural and synthetic waxes, fatty acids (stearic acid and coconut oil fatty acid), fatty acid alkanolamide (coconut oil fatty acid monoethanolamide), animal or vegetable oil and fat (tallow, wool fat and rapeseed oil), polyvinyl alkyl ether (polyvinyl isobutyl ether) and pigments (graphite, talc, chalk and kaolin).  In the examples steel tubes are coated and subsequently drawn.ALSO:A process for cold working metal comprises lubricating a metal (e.g. steel, chrome-nickel alloys, titanium and zirconium) by coating with a metal-free dispersion or solution (as defined) containing a cellulose ether (e.g. methyl, carboxymethyl, ethyl, methylethyl, hydroxyethyl, ethylhydroxyethyl and benzyl celluloses) and then subjecting the metal to cold working.  By metal-free solutions or dispersions is meant solutions or dispersions in which there is no elemental metal present as opposed to dissolved metal ions and in which there is no molybdenum disulphide.  The coating may be applied by flooding, dipping or spraying to a cleaned surface and dried, e.g. by heat. The solvents mentioned are water, chlorinated hydrocarbons (methylene chloride and tri- and per-chloroethylene), alcohols (isopropanol), esters, ketones and aromatic hydrocarbons. Phosphoric acid or ester thereof (e.g. trichloroethyl phosphate) may be included in the dispersion or solution.  The metal may be treated with a mineral oil before cold working.  Other compounds which may be included in the coating composition are polychloroprene, plasticizers (dioctyl sebacate and trichloroethyl phosphate), an alkyd resin modified with a fatty acid, polybutene, polyethylene, natural and synthetic waxes, fatty acids (stearic acid and coconut oil fatty acid), fatty acid alkanolamide (coconut oil fatty acid monoethanolamide), animal or vegetable oil and fat (tallow, wool fat and rapeseed oil), polyvinyl alkyl ether (polyvinyl isobutyl ether) and pigments (graphite, talc, chalk and kaolin).  In the examples steel tubes are coated and subsequently drawn.