The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 1986
Filed:
Apr. 23, 1985
Robert L Greene, Ann Arbor, MI (US);
James R Becker, Houston, TX (US);
Cameron Iron Works, Inc., Houston, TX (US);
Abstract
A process for producing a composite billet employing powder metallurgical techniques in which a first alloy powder of a preselected composition is compacted in a tubular container producing a preliminarily compacted tubular mass which thereafter is finished on the interior surface thereof to desired final dimensions. The resultant tubular mass is placed in a second container and the core thereof is filled with a powder of a desired second alloy composition and the contents are sealed. The second alloy powder is subsequently hot compacted to a density approaching 100 percent theoretical density without incurring any appreciable distortion or dimensional change of the tubular mass. Thereafter, the preliminary composite compacted billet is subjected under elevated temperature to an axial extrusion step producing a final composite extruded billet having a concentric outer layer of a first alloy and an inner core layer of a second alloy metallurgically bonded together.