Aging process for 7000 series aluminum base alloys

Details Aging process for 7000 series aluminum base alloys Aging process for 7000 series aluminum base alloys

1982-08-13

1984-02-14

Andrews, M. J.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148 131, 148417, C22F 104

Patent

active

044314671

ABSTRACT:
Aluminum base 7000 series alloys can have improved tensile properties when, after heat treatment and subsequent quenching, they are subjected to a three-step aging process comprising a first aging step at 190.degree.-230.degree. F., a second aging step at over 230.degree. F. and a third aging step at 315.degree.-380.degree. F. The improved process is particularly effective in improving the tensile properties of slowly quenched materials such as large extrusions or forgings.

REFERENCES:
patent: 3198676 (1965-08-01), Sprowls
patent: 3284193 (1966-11-01), Anderson et al.
patent: 3469433 (1969-09-01), Fresch et al.
patent: 3706606 (1972-12-01), DiRusso et al.
patent: 3791876 (1974-02-01), Kroger
Metals Handbook, 9th Edition, vol. 4, pp. 682-683, 700-703, Nov. 1981, American Society for Metals, Metals Park, Ohio.

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