| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat resistant Ti alloy improved in high temperature strength by adding C thereto in an amount of≥0.1%. SOLUTION: In the heat resistant Ti alloy, the Mo equivalent ([Mo]eq) expressed by the following formula is≤-4, preferably≤-6, or the area ratio of anαphase at 760°C is≥80%, preferably≥90%, the content of C is 0.1 to 0.25 mass%, and C exceeding a solid solution limit in theαphase is finely dispersed into the structure as TiC: [Mo]eq=1.0[Mo]+0.67[V]+0.44[W]+0.28[Nb]+0.22[Ta]+2.9[Fe]+1.6[Cr]+1.1[Ni]+1.4[Co]+0.77[Cu]-1.0[Al]; wherein, [X] denotes the content mass% of the element X. COPYRIGHT: (C)2005,JPO&NCIPI
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