| 摘要 |
Method for producing a large, substantially hot tear-free superalloy gas turbine bucket useful in a large, land-based utility gas turbine engine, wherein a melt of a superalloy consisting essentially of, by weight:2.0 to 3.0 percent tantalum, or 1.0 to 1.5 percent columbium, or 2.0 to 2.5 percent hafnium, or 1.5 to 3.5 percent of a mixture of containing at least two of tantalum, columbium and hafnium, balance substantially nickel, is cast to produce said large gas turbine bucket.
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