Production process of casting aluminum alloy and the said alloy for can material

摘要

(57) Abstract Being the aluminum alloy strip which is suited for the can material, it is thinner than approximately 30mm, or possesses equal thickness, big (Mn and Fe) it includes Al₆ in the said strip as a principal intermetallic particle. The intermetallic particle has average surface size in the surface of the strip, possesses average bulk size in the bulk of the strip. Average surface size is larger than average bulk size. The other element whose as for the strip product, essentially at weight, 0.05% Si with 0.15%, 0.3% Fe with 0.6%, 0.6% Mn with 1.2%, 1.1% Mg with 1.8%, 0.2% maximum of 0.2%, each one of the element is less than 0.05% Cu with 0.6%, and altogether element in addition to the aluminum, is equal is included, the melting alloy is cast with the continuous casting which possesses the portable mold surface which opposes, thickness after the casting becomes is smaller than 30mm equal. The portable mold surface has the surface roughness with 4 millimicron and 13 millimicrons of essentially sharp peak form, at the kind of speed which the arm between the resin condition crystal of interval with 12 millimicron and 18 millimicrons produces in the surface of the strip, the thermal current is discharged from the metal. The strip is produced in last thickness by rolling or annealing process.