Metal fusion bonding – Process – With pretreating other than heating or cooling of work part...
Patent
1987-02-17
1988-01-05
Godici, Nicholas P.
Metal fusion bonding
Process
With pretreating other than heating or cooling of work part...
228235, 22826317, B23K 2024
Patent
active
047170689
ABSTRACT:
The invention is directed to a process for plating Al alloys containing lithium by hot co-rolling under the usual heating conditions, in the air. The process comprises effecting controlled oxidation of the core alloy by heating in the air at between 450.degree. C. and 550.degree. C. for a period of time such that the depth affected by the surface loss of Li is between 50 and 700 .mu.m. The core is then treated mechanically or chemically to remove the surface oxides with a loss of alloy less than 30 .mu.m. An assembly of the core and platings is then co-rolled with reheating to a temperature of less than 500.degree. C. for less than 24 hours. The result is perfect adhesion of the core to the surface platings.
REFERENCES:
patent: 3963468 (1976-06-01), Jaeger et al.
patent: 4166292 (1979-09-01), Bokros
patent: 4172181 (1979-10-01), Kawase et al.
patent: 4172923 (1979-10-01), Kawase et al.
patent: 4635842 (1987-01-01), Mohondro
Cegedur Societe de Transformation
Godici Nicholas P.
Heinrich Samuel M.
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