ENHANCEMENT OF THERMAL STABILITY OF POROUS BODIES COMPRISED OF STAINLESS STEEL OR AN ALLOY

ENHANCEMENT OF THERMAL STABILITY OF POROUS BODIES COMPRISED OF STAINLESS STEEL OR AN ALLOY

A method for treating a porous item (20) constructed of metal powder, such as a powder made of Series 400 stainless steel, involves a step of preheating the porous item to a temperature of between about 700 and 900~ C degrees in an oxidizing atmosphere and then sintering the body in an inert or redu...

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Bibliographische Detailangaben
Hauptverfasser: SUTTON, THEODORE G, ADCOCK, KENNETH D, JUDKINS, RODDIE R, BISCHOFF, BRIAN L, ARMSTRONG, TIMOTHY R
Format: Patent
Sprache:eng ; fre
Schlagworte:
CASTING
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:A method for treating a porous item (20) constructed of metal powder, such as a powder made of Series 400 stainless steel, involves a step of preheating the porous item to a temperature of between about 700 and 900~ C degrees in an oxidizing atmosphere and then sintering the body in an inert or reducing atmosphere at a temperature which is slightly below the melting temperature of the metal which comprises the porous item. The thermal stability of the resulting item is enhanced by this method so that the item retains its porosity and metallic characteristics, such as ductility, at higher (e.g. near-melting) temperatures.