Iron aluminide alloy coatings and joints, and methods of forming

Details Iron aluminide alloy coatings and joints, and methods of forming Iron aluminide alloy coatings and joints, and methods of forming

1993-09-08

1994-09-27

Heinrich, Samuel M.

Metal fusion bonding

Process

Chemical reaction produces filler material in situ

228245, 2282485, 22826243, 2281221, 427191, B23K 2000, B23K 3100

Patent

active

053501071

ABSTRACT:
A method of joining two bodies together, at least one of the bodies being predominantly composed of metal, the two bodies each having a respective joint surface for joining with the joint surface of the other body, the two bodies having a respective melting point, includes the following steps: a) providing aluminum metal and iron metal on at least one of the joint surfaces of the two bodies; b) after providing the aluminum metal and iron metal on the one joint surface, positioning the joint surfaces of the two bodies in juxtaposition against one another with the aluminum and iron positioned therebetween; c) heating the aluminum and iron on the juxtaposed bodies to a temperature from greater than or equal to 600.degree. C. to less than the melting point of the lower melting point body; d) applying pressure on the juxtaposed surfaces; and e) maintaining the pressure and the temperature for a time period effective to form the aluminum and iron into an iron aluminide alloy joint which bonds the juxtaposed surfaces and correspondingly the two bodies together. The method can also effectively be used to coat a body with an iron aluminide coating.

REFERENCES:
patent: 3998779 (1976-12-01), Baer
patent: 4004047 (1977-01-01), Grisik
patent: 4711009 (1987-12-01), Cornelison
patent: 5084109 (1992-01-01), Sikka
Wright, R. N. et al, "Elemental Powder Processing of Iron Aluminides," American Powder Metallurgy Institute Proceedings, Dec., 1992

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