Method for producing components with a high load capacity from TiAl alloys

The invention relates to a method for producing components with a high load capacity from alpha+gamma TiAl alloys, especially for producing components for aircraft engines or stationary gas turbines. According to this method, enclosed TiAl blanks of globular structure are preformed by isothermal pri...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ROTH-FAGARASEANU DAN, SCHREIBER KARL, KNIPPSCHILD LOTHAR, JANSCHEK PETER
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CASTING CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY PERFORMING OPERATIONS POWDER METALLURGY TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	The invention relates to a method for producing components with a high load capacity from alpha+gamma TiAl alloys, especially for producing components for aircraft engines or stationary gas turbines. According to this method, enclosed TiAl blanks of globular structure are preformed by isothermal primary forming in the alpha+gamma- or alpha phase area. The preforms are then shaped out into components with a predeterminable contour by means of at least one isothermal secondary forming process, with dynamic recrystallization in the alpha+gamma- or alpha phase area. The microstructure is adjusted by solution annealing the components in the alpha phase area and then cooling them off rapidly.