| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an ingot of a TiAl-based alloy which can suppress the generation of surface defects, and a sound large-sized ingot can be produced. SOLUTION: In the method where a crucible bottom 1 is drawn out in the downward direction while feeding a melting raw material 3, so as to produce an ingot 6 according to a CCIM (cold crucible induction melting) process, the range of the power P to be applied when the melting raw material 3 is melted, so as to be a molten metal pool 5 is controlled to the range satisfying the inequality of 5600×D<SP>2</SP><P<6720×D<SP>2</SP>or 2560×D<SP>2</SP><P<4000×D<SP>2</SP>. COPYRIGHT: (C)2009,JPO&INPIT
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