发明名称 |
Nickel based forged alloy, gas turbine member using said alloy and gas turbine using said member |
摘要 |
It is an objective of the invention to provide a Ni-based forged alloy having good large ingot formability and good hot formability as well as high mechanical strength at high temperature. There is provided a Ni-based forged alloy comprising: 0.001 to 0.1 mass % of C; 0.001 to 0.01 mass % of B; 16 to 22 mass % of Cr; 0.5 to 1.5 mass % of Al; 0.1 to 6.0 mass % of W; 3.5 to 5.5 mass % of Nb; 0.8 to 3.0 mass % of Ti; 16 to 20 mass % of Fe; 2.0 mass % or less of Mo; and the balance including Ni and unavoidable impurities, in which: a segregation parameter Ps defined by a formula of “Ps (mass %) =1.05×[Al concentration (mass %)]+0.6×[Ti concentration (mass %)]−0.8×[Nb concentration (mass %)]−0.3×[Mo concentration (mass %)]” satisfies a relationship of “Ps≧−3.0 mass %”; and a total amount of W and Mo is 1.75 atomic % or less. |
申请公布号 |
US8864919(B2) |
申请公布日期 |
2014.10.21 |
申请号 |
US201213722505 |
申请日期 |
2012.12.20 |
申请人 |
Hitachi, Ltd. |
发明人 |
Sato Jun;Imano Shinya;Doi Hiroyuki;Shibayama Takashi |
分类号 |
C22C19/05 |
主分类号 |
C22C19/05 |
代理机构 |
Crowell & Moring LLP |
代理人 |
Crowell & Moring LLP |
主权项 |
1. An Ni-based forged alloy comprising: 0.001 to 0.1 mass % of C; 0.001 to 0.01 mass % of B; 16 to 22 mass % of Cr; 0.5 to 1.5 mass % of Al; 0.1 to 6.0 mass % of W; 3.5 to 5.5 mass % of Nb; 0.8 to 3.0 mass % of Ti; 16 to 20 mass % of Fe; 2.0 mass % or less of Mo; and the balance including Ni and unavoidable impurities, wherein:
a segregation parameter Ps defined by a formula of “Ps (mass %)=1.05×[Al concentration (mass %)]+0.6×[Ti concentration (mass %)]−0.8×[Nb concentration (mass %)]−0.3×[Mo concentration (mass %)]” satisfies a relationship of “Ps−3.0 mass %”; and a total amount of W and Mo is 1.75 atomic % or less. |
地址 |
Tokyo JP |