METHOD TO EXTEND REMAINING LIFE OF SINGLE CRYSTAL MATERIAL BY REHEATING TREATMENT - Director, Research Institute for Metals, Science and Technology Agency

Title:

METHOD TO EXTEND REMAINING LIFE OF SINGLE CRYSTAL MATERIAL BY REHEATING TREATMENT

Document Type and Number:

Japanese Patent JP3069580

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To improve creep characteristics and to extend the remaining life of a single crystal material which deteriorates in strength after used as a turbine blade of a jet engine or a gas turbine in an environment of high temp. and high stress.
SOLUTION: A single crystal material which is used for a time in a const. creep region (a) or in the initial stage (b) of acceleration creep and deteriorates its strength, for example, a Ni-based super heat-resistant single crystal alloy, is heat-treated to extend its life shown as curves (B) and (C).

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Inventors:

Hiroshi Koizumi
Shizuo Nakazawa
Hiroshi Harada
Chiaki Tanaka

Application Number:

JP23061195A

Publication Date:

July 24, 2000

Filing Date:

September 08, 1995

Export Citation:

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Assignee:

Director, Research Institute for Metals, Science and Technology Agency

International Classes:

C22F1/10; (IPC1-7): C22F1/10

Domestic Patent References:

JP61119661A
JP56158832A
JP6326343A
JP63118037A

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