Metal treatment – Compositions – Heat treating
Patent
1978-01-19
1980-11-18
Dean, R.
Metal treatment
Compositions
Heat treating
148 115A, C22F 104
Patent
active
042343593
ABSTRACT:
This disclosure relates to a method and apparatus for manufacturing an aluminum alloy electrical conductor which promote the formation of a wire having a fine, stable subgrain structure of small cell size in the aluminum matrix and a fine dispersion of stable, insoluble intermetallic phase particles. The subgrain structure is improved by closely controlling the thermomechanical processing, particularly the casting rate, deformation parameters and annealing characteristics. After casting, the cast product is substantially immediately hot-formed in a rolling mill wherein the first deformation is more than 30% such that a substantially well defined subgrain structure will be formed in the aluminum matrix, thereby maximizing a refinement of the subgrain structure by permitting breaking-up thereof in each of the subsequent deformations in the rolling mill. After cold-working, without preliminary or intermediate anneals, the product is finally annealed at a temperature not exceeding approximately 700.degree. F.
REFERENCES:
patent: 3512221 (1970-05-01), Schoerner
patent: 3920411 (1975-11-01), Schoerner et al.
patent: 4000008 (1976-12-01), Chia
Chia Enrique C.
Schoerner Roger J.
Dean R.
Hanegan Herbert M.
Linne Robert S.
Southwire Company
Tate Stanley L.
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