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US 6,173,886 B1Granted
Method for joining dissimilar metals or alloys
AssigneeThe University of Tennessee Research Corporation
InventorsMary Helen McCay, T. Dwayne McCay, Narendra B. Dahotre, John A. Hopkins, Frederick A. Schwartz, John Brice Bible
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Abstract
The present invention relates to an improved method for joining metals or alloys together. Specifically, the present invention relates to a method comprising the laser alloying of a first metal/alloy piece so that it can be joined with a second metal/alloy piece of a nonidentical composition.
Claims22
A method for joining two dissimilar metal or alloy pieces, comprising:
- a. coating a first surface of a first metal or alloy piece with a precursor layer comprising a binder and elemental/ceramic powder;
- b. irradiating the first surface of the first piece with a laser beam at a sufficient energy and for a sufficient time to produce a surface alloy layer on the said first piece;
- c. allowing the alloy layer to solidify;
- and
- d. joining a second metal or alloy piece to the surface alloy layer of the first piece, wherein the second piece has a composition that is not identical to that of the first piece.
2 more elements
A method for joining two dissimilar metal or alloy pieces, comprising:
- a. coating a first surface of a first metal or alloy piece with a precursor layer comprising a binder and elemental/ceramic powder;
- b. irradiating the first surface of the first piece with a laser beam at a sufficient energy and for a sufficient time to produce a surface alloy layer on the said first piece;
- c. allowing the alloy layer to solidify;
- d. flattening the first surface of said first piece;
- e. flattening a first surface of a second metal or alloy piece wherein the second piece has a composition that is not identical to that of the first piece;
- f. cleaning the first surface of said first piece and the first surface of a second piece;
- and
- g. joining a second metal or alloy piece to the surface alloy layer of the first piece.
5 more elements
A method for joining two dissimilar metal or alloy pieces, comprising:
- a. coating a first surface of a first metal or alloy piece with a precursor layer comprising a binder and elemental/ceramic powder;
- b. irradiating the first surface of the first piece with a laser beam at a sufficient energy and for a sufficient time to produce a surface alloy layer on the said first piece;
- c. allowing the alloy layer to solidify;
- d. cleaning the first surface of said first piece and the first surface of a second piece;
- and
- e. joining the first surface of the second metal or alloy piece to the surface alloy layer of the first piece, wherein the second piece has a composition that is not identical to that of the first piece, said joining performed by welding or cladding.
3 more elements
Dependencies are inferred from the claim text.