Title:
GAS TURBINE MOVING BLADE AND MANUFACTURE THEREOF
Document Type and Number:
Japanese Patent JPH03134201
Kind Code:
A
Abstract:
PURPOSE:To make it possible to improve corrosion resistance and creep strength in a blade part and high temperature strength in a dovetail part by continuously changing a composition between the blade part and the dovetail part. CONSTITUTION:In the case of an Ni-radical alloy-made gas turbine moving blade in which a blade part 10 is formed of a corrosion resistance alloy with a dovetail part 12 formed of a high temperature resistance high strength alloy, the blade part 10 is set to a 13wt.% or more Cr amount with the Cr amount gradually decreased from a shank part 11 over to the dovetail part 12, and the Cr amount is decreased in the dovetail part 12 having maximum strength. In this way, corrosion resistance and creep strength of the blade part 10 and high temperature strength of the dovetail part 12 can be improved. Accordingly, the extension of a life of the moving blade and the improvement of thermal efficiency of a gas turbine by increasing its combustion gas temperature can be contrived.
Inventors:
YOSHINARI AKIRA
MORIKAWA MINORU
HIRANE TERUO
ICHIGE MAKOTO
OKAYAMA AKIRA
SAITO TOSHIAKI
IIJIMA KATSUKI
ISHIDA TADAMI
KODAMA HIDEYO
HASHIDA RYOZO
MORIKAWA MINORU
HIRANE TERUO
ICHIGE MAKOTO
OKAYAMA AKIRA
SAITO TOSHIAKI
IIJIMA KATSUKI
ISHIDA TADAMI
KODAMA HIDEYO
HASHIDA RYOZO
Application Number:
JP27132289A
Publication Date:
June 07, 1991
Filing Date:
October 18, 1989
Export Citation:
Assignee:
HITACHI LTD
International Classes:
F01D5/28; B22D19/00; B22D21/00; B22D27/04; F01D5/30; (IPC1-7): B22D19/00; B22D21/00; B22D27/04; F01D5/28; F01D5/30
Attorney, Agent or Firm:
Tatsuyuki Unuma (2 others)