Cold deformation process employing improved lubrication coating

Details Cold deformation process employing improved lubrication coating Cold deformation process employing improved lubrication coating

1991-01-04

1993-08-10

Silverberg, Sam

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148262, C23C 2283

Patent

active

052345092

ABSTRACT:
In the practice of the instant invention, a lubricating phosphate coating is applied to the surface of a ferrous-base metal article by contacting the surface with an aqueous acidic phosphate coating solution which contains an amount of hydroxylamine which is effective in increasing the rate at which the phosphate coating deposits from the solution. The resulting coated article is then subjected to cold deformation.
In a preferred embodiment, the metal article is additionally contacted with a second lubricating compound after the phosphate coating is applied. In addition to phosphate, the coating solutions employed preferably contain one or more of the following ions: zinc, manganese, nitrate, nickel, ferrous, ferric, copper, fluoride, or mixtures thereof.

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