Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Patent
1991-06-04
1992-06-16
Dean, R.
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
148437, 148438, 148439, 148440, 148692, 420541, 420902, C22F 104
Patent
active
051221969
ABSTRACT:
The sheet metal which has recrystallized as fine grains and has superplastic characteristics consists of a work-hardenable, age-hardenable AlMgZn alloy. After continuous casting, the alloy containing 3-5.5% of magnesium, 2-8% of zinc, 0.4% of copper, 0-1% of manganese, 0-0.5% of iron, 0-0.4% of chromium, 0-0.4% of molybdenum, 0-0.4% of zirconium, 0-0.3% of silicon and 0-0.05% of titanium, the remainder being aluminium of commercial purity, is homogenized and rolled off hot. After an optional intermediate annealing, the strip is rolled off cold to the final thickness using a high degree of cold rolling, recrystallized, using rapid heating to effect softening, and cooled.
REFERENCES:
patent: 3984260 (1976-10-01), Watts et al.
patent: 4021271 (1977-05-01), Roberts
patent: 4867805 (1989-09-01), Agrawal et al.
patent: 4874578 (1989-10-01), Homberger et al.
Alusuisse-Lonza Services Ltd.
Dean R.
Koehler Robert R.
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