Light-gage composite-coated flat-rolled steel manufacture...

Details Light-gage composite-coated flat-rolled steel manufacture... Light-gage composite-coated flat-rolled steel manufacture...

B - Operations, Transporting

21

C

B21C 23/22 (2006.01) B05D 7/00 (2006.01) B05D 7/14 (2006.01) B21B 1/28 (2006.01) B32B 15/04 (2006.01) B32B 15/08 (2006.01) B32B 15/18 (2006.01) B65D 1/12 (2006.01) B65D 1/28 (2006.01) B65D 85/72 (2006.01) B21B 1/38 (2006.01) B21B 45/02 (2006.01)

Patent

CA 2138257

New composite-coated flat-rolled steel products and new methods of manufacture in which low carbon steel (16), as received in cold-reduced continuous strip form is prepared for plating; a corrosion prevention plating (24) is applied, and a polymeric coating with lubricant (26) is applied as a finish surface. The resulting composite-coated steel substrate is cold-rolled (36) to decrease the gage of the coated substrate. Optionally, cold-rolling steps (14) and/or stress relief heat treatment steps (10,20) may be employed prior to surface treatment. This process provides for tin mill manufacture of composite-coated steel of various weights per unit area, for example, in the range of 35 to about 100 lb/bb, useful in the manufacture of can bodies.

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