Metal treatment – Process of modifying or maintaining internal physical... – Processes of coating utilizing a reactive composition which...
Patent
1995-11-06
1996-12-17
Silverberg, Sam
Metal treatment
Process of modifying or maintaining internal physical...
Processes of coating utilizing a reactive composition which...
72 42, 508158, 508199, C21D 702, C10M11102
Patent
active
055849458
ABSTRACT:
Disclosed is a lubricant carrier salt for facilitating the cold forming of a workpiece of iron or steel, based on boric acid and/or alkali borate. The salt has an additional content of aliphatic di- or tricarboxylic acid, which either is unsubstituted or substituted by at least one hydroxyl group, and/or of alkali salts thereof, the weight ratio of boric acid/alkali borate to the acid is (5 to 15):1. Especially appropriate carboxylic acids are malonic acid, maleic acid, succinic acid, tartaric acid and/or citric acid.
Inorganic or organic thickening agents, such as bentonite and/or polysaccharide, aluminate and/or silicate, dispersants, lubricants and/or antioxidants as well as titanium salt can be contained as additional components in the lubricant carrier salt of the invention.
Also disclosed is a method for facilitating the cold working of a workpiece of iron or steel, in which the lubricant carrier salt is applied to the workpiece, provided if desired with a phosphate coating, out of an aqueous solution or dispersion with a concentration of 5 to 30 wt-% and with a temperature of 80 to 100.degree. C. by the immersion or pass-through method.
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Oppen, D., "Chemische Oberfl achenbehandlung als Mittel zur Erleichterung der Kaltumformung", Metall Oberfl ache, Nov. 1982.
Nittel Klaus-Dieter
Schwinke-Kruse Norbert
Metallgesellschaft Aktiengesellschaft
Silverberg Sam
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