Method for the production of black plate with improved...

Details Method for the production of black plate with improved... Method for the production of black plate with improved...

B - Operations, Transporting

21

B

117/111, 148/13

B21B 45/02 (2006.01) B21D 22/20 (2006.01) C23C 22/74 (2006.01)

Patent

CA 1051290

ABSTRACT OF THE DISCLOSURE To prevent galling during the drawing and ironing process black plate is provided with an economical coating for improving surface lubricity. Cold-reduced strip is rinsed with a solution containing soluble salts of manganese and sulfur, e.g. MnSO4; the strip is dried and then heated to above 800°F in a reducing atmosphere, such as HNX. Heating is conducted at a temperature sufficient to reduce the sulfates and provide a surface coating of MnS in which the surface sulfur concentration is in excess of 0.5%.

261166

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