C - Chemistry – Metallurgy – 22 – F
Patent
C - Chemistry, Metallurgy
22
F
22/167
C22F 1/04 (2006.01) B21B 3/00 (2006.01) B22D 21/04 (2006.01)
Patent
CA 1171235
ABSTRACT OF THE DISCLOSURE The present invention teaches a multi-stepped process for preparing high strength, improved formability, low earing strip stock which is especially suitable for the manufacture of deep drawn and ironed hollow bodies such as cans or the like. The process of the present invention is carried out in two distinct operations. The first operation comprises continuously casting an aluminum melt into strip form on a strip casting machine so as to produce a desired dendritic arm spacing, hot rolling the continuously cast strip at casting speed in a temperature range between 300°C and the non-equilibrium solidus temperature of the alloy with the total reduction in excess of 70% and finally coiling the hot strip and allowing it to cool in air to room temperature so as to produce a metal strip having properties favorable for subsequent cold rolling operations. The second operation comprises an improved cold rolling operation in which a brief heat treatment at 350°C to 500°C for not more than 90 seconds is introduced-between a first and second cold rolling operation.
333160
Bolliger Martin
Buxmann Kurt
Gyongyos Ivan
Kerth Willi
Neufeld Kurt
Swabey Ogilvy Renault
Swiss Aluminium Ltd.
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