Coating processes – Vacuum utilized prior to or during coating – Metal base
Patent
1988-01-12
1994-05-17
Walsh, Donald P.
Coating processes
Vacuum utilized prior to or during coating
Metal base
427314, 427318, 427319, 4273767, 419 48, 419 49, B05D 110
Patent
active
053126505
ABSTRACT:
The method of making a composite article of different metal portions by spraying molten metal on the surface of a solid metal member that has been cleaned and preheated in a controlled atmosphere at low pressure. The molten metal is sprayed on the surface of the solid metal member, preferably by plasma jet spraying. It is rapidly solidified to be adherent to the surface of the solid metal member to form a composite preform. The composite preform is cooled at a rate sufficiently low to reduce residual stresses and then hot pressed to eliminate voids in the sprayed metal portion and metallurgically bonded to the surface of the solid member.
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Dalal Ranes P.
Dardi Louis E.
McFadden John M.
Straszheim Mark J.
Greaves J. N.
Howmet Corporation
Walsh Donald P.
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