E.i. Dupont De Nemours and Company

Other

Engelhard-Clal

David Archer Wells

Vinci Martinez Felix

Charles Joseph Noelke

John James Barnes

Peter Gideon Gelblum

Richard D Lanam

Joseph Gerard Biondo

A layered article having a curved surface made of a supporting metal metallurgically bonded to a supported metal.

Metallurgically bonded layered article having a curved surface

The present invention relates to a process for extruding molybdenum-rhenium alloys into tubes or pipes. The invention is capable of high temperature extrusion of MoRe alloys, which comprise about 10 to 50 wt. % rhenium, into a seamless piper or tube. The steps of the process generally comprise fabricating a MoRe billet or blank which includes a pilot hole that extends along the longitudinal axis of the billet, heating the billet to a temperature of at least about 1300.degree. C., and extruding the heated billet by operation of an extrusion press.

Extrusion of seamless molybdenum rhenium alloy pipes

The present invention relates to a process for friction welding molybdenum-rhenium alloys which include from about 10% to about 50% by weight. The process of the invention comprises effecting a relative rotation of two MoRe work pieces at rim surface speeds up to about 4,000 to 8,000 inches per minute, forcing the work pieces into frictional contact under an axially applied pressure of about 3,000 to 20,000 pounds per square inch of interface surface.

Friction welding molybdenum-rhenium alloy

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Newark, DE, United States of America

David Archer Wells