Method for the manufacture of a composite article

Claim 2

METHOD OF PRODUCING A COMPOSITE METAL ARTICLE COMPRISING AN ALUMINUM BODY HAVING A FERROUS METAL LAYER ATTACHED THERETO COMPRISING THE STEPS OF: APPLYING A MONO PARTICLE LAYER OF FERROUS METAL MACHINING CHIPS ON THE SURFACE OF A FERROUS METAL LAYER; BRAZING SAID CHIPS TO SAID FERROUS METAL LAYER; DIE CASTING SAID ALUMINUM BODY ONTO SAID CHIPS WHEREBY THE MOLTEN METAL ENTERS THE INTERSTICES OF SAID CHIPS AND ON SOLIDIFICATION THE ALUMINUM BODY IS MECHANICALLY ATTACHED TO SAID FERROUS LAYER.

Claim 3

Method of making a composite metal article comprising an aluminum portion and a ferrous metal portion comprising the steps of: applying a mono particle layer to ferrous metal machining chips of a size of about -8, +20 mesh on a ferrous metal surface with said chips being randomly and substantially uniformly distributed and covering major proportions of said surface; brazing said chips to said ferrous metal layer; and die casting an aluminum body onto said chips whereby the molten aluminum enters the interstices of said chips and on solidification the aluminum body is mechanically attached to said ferrous layer.

Claim 4

Method of making a composite metal article comprising an aluminum portion and a ferrous metal portion comprising the steps of: applying a mono particle layer to ferrous metal machining chips of a size of about -8, +20 mesh on a ferrous metal surface with said chips being randomly and substantially uniformly distributed and covering major proportions of said surface; brazing said chips to said ferrous metal layer; and die casting an aluminum body onto said chips whereby the molten aluminum enters the interstices of said chips and on solidification the aluminum body is mechanically attached to said ferrous layer.

Claim 5

Method of making a composite metal article comprising an aluminum portion and a ferrous metal portion comprising the steps of: applying a mono particle layer of ferrous metal machining chipS of a size of about -8, + 20 mesh on the surface of a ferrous metal layer with said chips being applied in amounts of about 1 to 2 grams per square inch of said ferrous metal layer, randomly and substantially uniformly distributed over said metal layer; brazing said chips to said metal layer; and die casting an aluminum body onto said chips whereby the molten aluminum enters the interstices of said chips and on solidification the aluminum body is mechanically attached to said ferrous layer.

Claim 6

Method of making a composite metal article comprising an aluminum portion and a ferrous metal portion comprising the steps of: applying a mono particle layer of ferrous metal machining chipS of a size of about -8, + 20 mesh on the surface of a ferrous metal layer with said chips being applied in amounts of about 1 to 2 grams per square inch of said ferrous metal layer, randomly and substantially uniformly distributed over said metal layer; brazing said chips to said metal layer; and die casting an aluminum body onto said chips whereby the molten aluminum enters the interstices of said chips and on solidification the aluminum body is mechanically attached to said ferrous layer.

Claim 7

Method of making a composite metal article comprising an aluminum portion and a ferrous metal portion comprising the steps of: applying a mono particle layer of ferrous metal machining chips of a size of about -8, +20 mesh on the surface of a ferrous metal layer with said chips being applied in amounts of about 1 to 2 grams per square inch of said ferrous metal layer, randomly and substantially uniformly distributed over said metal layer; sprinkling a copper powder of a size of -100, +325 mesh over said mono particle layer in amounts of about 0.3 grams per square inch of said ferrous metal layer surface; heating said ferrous metal surface in a reducing atmosphere to the brazing temperature of said copper powder whereby the molten copper wets and brazes the ferrous chips in place; die casting an aluminum body onto said chips whereby the molten aluminum enters the interstices of said chips and on solidification the aluminum body is mechanically attached to said ferrous layer.

Claim 8

Method of making a composite metal article comprising an aluminum portion and a ferrous metal portion comprising the steps of: applying a mono particle layer of ferrous metal machining chips of a size of about -8, +20 mesh on the surface of a ferrous metal layer with said chips being applied in amounts of about 1 to 2 grams per square inch of said ferrous metal layer, randomly and substantially uniformly distributed over said metal layer; sprinkling a copper powder of a size of -100, +325 mesh over said mono particle layer in amounts of about 0.3 grams per square inch of said ferrous metal layer surface; heating said ferrous metal surface in a reducing atmosphere to the brazing temperature of said copper powder whereby the molten copper wets and brazes the ferrous chips in place; die casting an aluminum body onto said chips whereby the molten aluminum enters the interstices of said chips and on solidification the aluminum body is mechanically attached to said ferrous layer.