Process for compacting metal powder
Abstract
Abstract A PROCESS FOR PRODUCING BILLETS OF METALS AND METAL ALLOYS EMPLOYING POWDER METALLURGICAL TECHNIQUES WHEREIN THE RESULTANRT CONSOLIDATED POWDER MASSES ARE CHARACTERIZED AS HAVING A WROUGHT-TYPE GRAIN STRUCTURE POSSESSED OF EXCELLENT HIGH TEMPERATURE PHYSICAL PROPPERTIES. THE PROCESS RELIES ON THE USE OF TWO SEQUENTIALLYPHASED COMPACTION STEPS, WHEREBY THE METAL POWDER PACKED WITHIN A SEALED DUCTILE CONTAINER IS FIRST HOT ISOSTATICALLLY PRESSED TO A DENSITY OF AT LEAST ABOUT 90% OF THEORETICAL DENSITY AND THEREAFTER IS EXTRUDED AT AN ELVATED TEMPERATURE AT AN EXTRUSION RATIO GREATER THAN ABOUT 2:1 TO PRODUCE A BILLET WHICH APPRAOCHES 100% THEORETICAL DENSITY AND IS OF SUBSTANTIALLY UNIFORM GRAIN STRUCTURE THROUGHOUT.
Inventors
- 👤 J Smythe
- 👤 S Reichman
- 👤 D Weaver
Bibliographic Details
Claims Analysis
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