| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an ingot of a TiAl-based alloy which can produce a large-sized ingot composed of a lightweight and high strength TiAl-based alloy in which the content of oxygen is low in the whole region, and which has satisfactory room temperature ductility and has no casting defects. SOLUTION: In the method where the bottom plate 3 of a water-cooled crucible 1 made of copper is drawn out in downward direction while feeding a melted base material b formed by melting alloy raw materials (a), so as to produce a long-length ingot d, among the alloy raw materials (a), the content of oxygen in a Ti raw material is controlled to≤800 ppm and the content of oxygen in an Al raw material is controlled to≤100 ppm, and, in the case the other alloy components are Cr, V and Nb, the content of oxygen therein is controlled to≤2,000 ppm, and in the case the other alloy component is Mn, the content of oxygen therein is controlled to≤3,000 ppm. COPYRIGHT: (C)2009,JPO&INPIT
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