초록 ▼

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

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.

대표청구항 ▼

A multi-stepped process for fabricating high strength, improved formability, low earing aluminum strip stock from an aluminum melt comprising: (A) continuously casting said aluminum melt in strip form; (B) holding said casting strip at casting speed after the start of solidification at a temperature

A multi-stepped process for fabricating high strength, improved formability, low earing aluminum strip stock from an aluminum melt comprising: (A) continuously casting said aluminum melt in strip form; (B) holding said casting strip at casting speed after the start of solidification at a temperature between 400°C. and the liquidus temperature of the alloy for about 2 to 15 minutes prior to hot rolling so as to obtain a preferred dendritic arm spacing; (C) continuously hot rolling the cast strip at casting speed at a temperature range between 300°C. and the non-equilibrium solidus temperature of the alloy to a total reduction of at least 70%; and (D) hot coiling said hot rolled strip wherein said coiled strip is allowed to cool in air to room temperature prior to further working.