Non-ferrous fasteners having ferrous metal core

Details Non-ferrous fasteners having ferrous metal core Non-ferrous fasteners having ferrous metal core

B - Operations, Transporting

23

K

85/52, 13/7

B23K 20/00 (2006.01) B32B 23/00 (2006.01)

Patent

CA 1050216

ABSTRACT OF THE DISCLOSURE A method of providing a member having a ferrous metal core with a nonferrous coating wherein the ferrous metal core affords strength and rigidity while the nonferrous outer coating provides a non-corrosive surface and wherein the coating is of such uniform thickness that final forming of the member may be perforated without penetrating or breaking the coating or exposing the core. The coating is applied by extruding the non-ferrous material in a die pocket and passing the ferrous metal core through the plastic nonferrous metal in the pocket with only the high extrusion pressure creating the heat to render the nonferrous metal plastic.

254871

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