PRODUCTION OF TI-AL-BASE HEAT RESISTING ALLOY

PURPOSE:To provide superior embrittlement characteristic under long-time and high-temp. service conditions as well as excellent heat resistance by casting an Nb-containing Ti-Al alloy and providing a heat cycle in a specific temp. region. CONSTITUTION:An alloy having a composition consisting of, by...

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Hauptverfasser:	MITAO SHINJI, MINAGAWA KUNINORI, TSUYAMA AOSHI
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS METALLURGY TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Zusammenfassung:	PURPOSE:To provide superior embrittlement characteristic under long-time and high-temp. service conditions as well as excellent heat resistance by casting an Nb-containing Ti-Al alloy and providing a heat cycle in a specific temp. region. CONSTITUTION:An alloy having a composition consisting of, by weight ratio, 28-38% Al, 0.520% Nb, further 0.23-3.5% Si and/or 0.3-5.5% Zr, and the balance essentially Ti is cast. A heat cycle is provided to the resulting cast billet in a temp. region of 600-1350 deg.C, by which structure can be uniformized and residual stress can be reduced. By this method, a Ti-Al-base heat resisting alloy excellent in high-temp. and long-time heating embrittlement resisting characteristic can be obtained.