METHOD FOR EVALUATING DAMAGE OF FERRITE-BASED HEAT RESISTING MATERIAL

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专利权人:

NATIONAL INSTITUTE FOR MATERIALS SCIENCE

发明人:

HAYAKAWA MASAO,YAMAGUCHI KOJI,KIMURA MEGUMI,KOBAYASHI KAZUO

申请号：

JP20030171003

公开号：

JP2005009880(A)

申请日:

2003.06.16

申请国别(地区):

日本

年份:

2005

代理人:

摘要：

PROBLEM TO BE SOLVED: To easily and quantitatively evaluate the damage and deterioration of a ferrite-based heat insulating material. SOLUTION: For the ferrite-based heat insulating material, the length laid along the grain boundary of a grain boundary precipitate precipitated on an old austenic grain boundary (lγ) and the length of the old austenic grain boundary (Lγ) are measured, the grain boundary coverage factor ((Σlγ/Lγ)×100) that is the ratio of the total sum of the length laid along the grain boundary of the grain boundary precipitate to the length of the old austenic grain boundary is calculated, and the damage is quantitatively evaluated with the grain boundary coverage factor. COPYRIGHT: (C)2005,JPO&NCIPI

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