Method of raising the recrystallization temperature of aluminium

Details Method of raising the recrystallization temperature of aluminium Method of raising the recrystallization temperature of aluminium

1987-11-23

1989-03-28

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148401, 148437, 420 7, 420528, C22F 104, C22C 2100

Patent

active

048160881

ABSTRACT:
The invention relates to a method for the deformational transformation of aluminum and its alloys comprising the steps of deforming the aluminum in the solid state and annealing the deformed aluminum at a temperature at which recrystallization occurs. The recrystallization temperature of the aluminum is raised and the grain size is minimized by adding to the aluminim 5 to 1000 ppm uranium prior to the deformation. The method is particularly applicable to the production of aluminum based sheets intended to be subjected to heating at a relatively high temperature, for example the heating which accompanies enamelling or brazing operations, where the heating operation could change the mechanical properties of the sheets.

REFERENCES:
patent: 1415733 (1922-05-01), Thofehrn
patent: 3104252 (1963-09-01), Radd et al.

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