Surface reforming method of aluminum alloy members

Details Surface reforming method of aluminum alloy members Surface reforming method of aluminum alloy members

1992-09-22

1994-04-12

Dean, R.

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

29 9001, 29 907, 72 53, 72 76, 148552, 148696, 148697, C22F 104

Patent

active

053022181

ABSTRACT:
An aluminum alloy member is heated to 470.degree.-550.degree. C., and is quenched to room temperature for hardening. Then the aluminum alloy member is heated to 160.degree.-220.degree. C., and is cooled, which is carried out in a cooling process of a tempering treatment. As the aluminum alloy member is in a softening state in the cooling process, plastic working such as shot peening treatment is performed on the surface of the aluminum alloy member. Thereafter, the temperature of the aluminum alloy member falls to room temperature. In this way, it is possible to generate a great amount of compression residual stress in the aluminum alloy member, without performing a severe plastic working treatment on the surface thereof. Since the present invention requires no severe plastic working treatments on the surface of the aluminum alloy member, this causes no severe surface roughness thereon.

REFERENCES:
patent: 3469433 (1969-09-01), Fresch et al.
patent: 3531337 (1970-09-01), Kawakatsu

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