| 摘要 |
PROBLEM TO BE SOLVED: To provide Ni-based single crystal superalloy excellent in TMF characteristics, creep characteristics and environment-resistant characteristics, having small direction dependance of creep characteristics, and excellent in cost performance in practical use.SOLUTION: The Ni-based single crystal superalloy contains Cr:6 mass% to 12 mass%, Mo:0.4 mass% to 3.0 mass%, W:6 mass% to 10 mass%, Al:4.0 mass% to 6.5 mass%, Nb:0 mass% to 1 mass%, Ta:8 mass% to 12 mass%, Hf:0 mass% to 0.15 mass%, Si:0.01 mass% to 0.2 mass% and Zr:0 mass% to 0.04 mass%, may contain at least one element of B, C, Y, La, Ce or V and contains the balance Ni with inevitable impurities. |
