Ni-based single crystal superalloy and turbine blade incorporating the same

US9499886B2 · kind B2 · utility

Assignee

• IHI Corporation · JP

Inventors

• Akihiro Sato · Toyama, JP
• Kazuyoshi Chikugo · Tokyo, JP
• Yasuhiro Aoki · Yokohama, JP
• Nobuhito Sekine · Soma, JP
• Mikiya Arai · Tokyo, JP
• Shoju Masaki · Tokyo, JP

Key dates

• Filing date: Jun 18, 2015
• Grant date: Nov 22, 2016
• Expiry date: Jun 18, 2035

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2300/607
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A Ni-based single crystal superalloy which has the following composition: Co: 4.0 to 9.5 wt %, Cr: 5.1 to 8.0 wt %, Mo: 2.1 to 3.5 wt %, W: 0.0 to 2.9 wt %, Ta: 4.0 to 10.0 wt %, Al: 4.5 to 6.5 wt %, Ti: 0.0 to 1.0 wt %, Hf: 0.08 to 0.5 wt %, Nb: 0.0 to 3.0 wt %, Re: 4.5 to 8.0 wt % and Ru: 0.5 to 6.5 wt % with the remainder including Ni and unavoidable impurities, wherein P1≦700 is satisfied in which P1 represents a parameter 1, which is obtained by a formula: P1=137×[W (wt %)]+24×[Cr (wt %)]+46×[Mo (wt %)]−18×[Re (wt %)].