초록 ▼

Aluminum alloy sheet for use in drawn and ironed can bodies, having a content of 0.45-0.8% Mn, 1.1-2.2% Mg, 0.3-1.2% Fe, and 0.1-0.50% Si, produced by casting a continuous strip ingot of the alloy between chilled moving belts while maintaining a heat flux of at least about 40 cal./cm.2/sec. through

Aluminum alloy sheet for use in drawn and ironed can bodies, having a content of 0.45-0.8% Mn, 1.1-2.2% Mg, 0.3-1.2% Fe, and 0.1-0.50% Si, produced by casting a continuous strip ingot of the alloy between chilled moving belts while maintaining a heat flux of at least about 40 cal./cm.2/sec. through the belts such that the as-cast ingot has a cell size ranging from about 10-15 microns at its surfaces to about 23-30 microns at the center of its thickness, and reducing the ingot by rolling operations including cold rolling to can body stock gauge, the cold-rolled product having a maximum constituent particle size of about 2 microns at the surface and about 3-4 microns at the center.

대표청구항 ▼

A process for making can stock comprising cold-rolled aluminum alloy sheet directly formable, by drawing and ironing, into a one-piece can body, said process comprising (a) continuously strip-casting an ingot of an aluminum alloy consisting essentially of 0.45-0.8% Mn, 1.1-2.2% Mg, 0.3-1.2% Fe, 0.1-

A process for making can stock comprising cold-rolled aluminum alloy sheet directly formable, by drawing and ironing, into a one-piece can body, said process comprising (a) continuously strip-casting an ingot of an aluminum alloy consisting essentially of 0.45-0.8% Mn, 1.1-2.2% Mg, 0.3-1.2% Fe, 0.1-0.50% Si, up to 0.05% Ti, up to 0.15% each of Cu and Cr, other elements up to 0.05% each and up to 0.1% total, balance Al, the combined content of Mn+Mg being more than 1.9% and the combined content of Fe+Mn+Mg being at least about 2.5%; and (b) subjecting said ingot to rolling, including at least a final cold-rolling operation, to produce said sheet; wherein the improvement comprises: (c) performing the step of casting said ingot by continuously supplying the alloy in molten state to a casting space defined between facing extended planar surfaces of a pair of chilled, thermally conductive endless belts continuously moving so as to advance the supplied alloy through the casting space as a solidifying strip ingot in extended contact with said belt surfaces while maintaining a constant heat flux of at least about 40 cal./cm.2/sec. through the belts, for producing an ingot which becomes fully solidified while in contact with the belt surfaces within the casting space and which as cast has a cell size of about 10-15 microns at its surfaces and of about 23-30 microns at the center of its thickness, and for providing in said cold-rolled sheet a constituent particle size of not more than about 2 microns at its surfaces and not more than about 4 microns at the center of its thickness.