| 摘要 |
PROBLEM TO BE SOLVED: To provide a cast alloy suitable for a turbine wheel of a diesel car, and to provide a casting thereof. SOLUTION: The cast alloy for the turbine wheel comprises, by weight ratio, 0.1% or less C, 2.0% or less Si, 2.0% or less Mn, 25-45% Ni, 10-22% Cr, 2-5% Mo, 1.5-6.0% Ti, 0.5-3.0% Al and the balance Fe with unavoidable elements, while satisfying Ti/Al of 4 or less and 2(Ti+Al)+Cr of 20-30%. The alloy may further include one or more elements of 0.05-2.0% Nb, 0.05-2.0% Ta, 0.0005-0.01% B, 0.0005-0.02% Ca and 0.0005-0.02% Mg, as needed. The casting for the turbine wheel is made of the above alloy, has the high-temperature properties equal to or better than those of a conventional turbine wheel casting, and enables great cost-reduction. COPYRIGHT: (C)2004,JPO
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