Title:
NICKEL-BASED SUPERALLOY DEGRADATION DIAGNOSIS METHOD
Document Type and Number:
Japanese Patent JP2014126442
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a nickel-based superalloy degradation diagnosis method which uses a simple degradation diagnosis method and achieves accurate degradation diagnosis.SOLUTION: There is provided the nickel-based superalloy degradation diagnosis method in which a nickel-based superalloy is subjected to heating treatment under a condition that satisfies a relationship between heating treatment temperature (T) and heating treatment time (t) defined by the following expression (1), then the presence of a crystal caused by re-crystallization in a nickel superalloy is measured. 31.0<[(T+273)(logt+20)]/1000<33.5 ...(1). The heating treatment is preferably done under a condition that satisfies the expression (1) within a heating treatment temperature range of 1,200-1,350°C and a heating treatment time range of 4-24 hours. A method of measuring the presence of the crystal caused by re-crystallization in the nickel superalloy uses a scanning electron microscope and an analysis device.
Inventors:
KOBAYASHI DAISUKE
Application Number:
JP2012283004A
Publication Date:
July 07, 2014
Filing Date:
December 26, 2012
Export Citation:
Assignee:
CHUBU ELECTRIC POWER
International Classes:
G01N23/225; F01D5/28; F01D9/02; F01D25/00; F02C7/00; G01N23/04; G01N33/20; C22C19/05; C22F1/00; C22F1/10
Domestic Patent References:
| JP2005539139A | 2005-12-22 | |||
| JP2004012377A | 2004-01-15 | |||
| JP2002146460A | 2002-05-22 |
Foreign References:
| WO2008111585A1 | 2008-09-18 |
Attorney, Agent or Firm:
Hironobu Onda
Makoto Onda
Makoto Onda
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