Method for producing fine-grained, high strength aluminum alloy materials
An aluminum alloy material having a high strength, small grain size, good resistance to stress corrosion cracking and very high degree of workability is produced from an aluminum base alloy consisting essentially of 5.1 to 8.1 wt. % Zn, 1.8 to 3.4 wt. % Mg, 1.2 to 2.6 wt. % Cu, up to 0.2 wt. % Ti and at least one of 0.18 to 0.35 wt. % Cr and 0.05 to 0.25 wt. % Zr, the balance being aluminum and impurities by an improved production method described in detail in the disclosure. The improved method is particularly characterized by a special annealing step in a continuous annealing furnace under the application of a tension not exceeding 2 kg/mm/sup 2/ to a coiled alloy sheet to be annealed, the annealing including rapid heating of the coiled alloy sheet to a temperature of 400/sup 0/ to 500/sup 0/ C. at a heating rate exceeding 50/sup 0/ C./min.
- Assignee:
- Sumitomo Light Metal Industries Ltd. (Japan)
- Patent Number(s):
- US 4462843
- OSTI ID:
- 6401904
- Resource Relation:
- Patent Priority Date: Priority date 5 Mar 1982, Japan; Other Information: PAT-APPL-355058
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ALUMINIUM BASE ALLOYS
PRODUCTION
ANNEALING
CHEMICAL COMPOSITION
CHROMIUM ADDITIONS
COPPER ALLOYS
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
CRACKING
FABRICATION
GRAIN SIZE
HEATING
HIGH TEMPERATURE
MAGNESIUM ALLOYS
QUANTITY RATIO
STRESS CORROSION
TITANIUM ADDITIONS
ZINC ALLOYS
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CRYSTAL STRUCTURE
DECOMPOSITION
HEAT TREATMENTS
MICROSTRUCTURE
PYROLYSIS
SIZE
THERMOCHEMICAL PROCESSES
TITANIUM ALLOYS
360101* - Metals & Alloys- Preparation & Fabrication