Title:
ガスタービン用高温部材
Document Type and Number:
Japanese Patent JP4175209
Kind Code:
B2
Abstract:
A high-temperature member for use in a gas turbine is formed from a cobalt-based alloy comprising 15-35 wt% of chromium; 0.02-1.5 wt% of silicon; 0.01-0.2 wt% of carbon; at least one kind of metal selected from the group consisting of niobium, tungsten, tantalum and rhenium, the total content of these four metals being controlled not to exceed 10 % by atomic ratio of the entirety of the alloy excluding carbon; and at least one metal selected from the group consisting of nickel, manganese and iron, the total content of these metals being within a range of 1-9 wt%, the total content of nickel being controlled not to exceed 5 wt%, and the cobalt-based alloy having both of excellent resistance due to work hardening of the matrix and excellent ductility under room temperature. Then, in order to improve the high-temperature wear resistance, a pre-hardened layer is formed in the surface portion (8) of the member (3, 4) by shot peening.
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Inventors:
Kazuya Nishi
Application Number:
JP2003206999A
Publication Date:
November 05, 2008
Filing Date:
August 11, 2003
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
C22C19/07; F01D5/28; F01D9/02; F02C7/00; F02C7/28; C21D7/06
Domestic Patent References:
| JP2001152277A | ||||
| JP36013514B1 | ||||
| JP5081653B2 | ||||
| JP2004027359A |
Attorney, Agent or Firm:
Manabu Inoue