Open Access
Materials Science-Poland, volume 42, issue 4, pages 50-65
Microstructure morphology and aging characteristics of 9% Cr martensitic heat-resistant steel after service
Kun Zhang
1
,
Wenhe Cai
2
,
Zhichun Wang
3
,
Xin Chen
1
,
Fengyuan Shu
4
,
Yang Shi
5
,
Jianwei Wang
5
,
Weili Li
2
,
Xin Zhang
6
1
China Nuclear Energy Technology Co., Ltd. , Beijing , 100193 , China
|
4
5
China Fire and Rescue Institute , Beijing , 102202 , China
|
6
Science and Technology Research Institute , State Power Investment Corporation , Beijing , 102209 , China
|
Publication type: Journal Article
Publication date: 2024-12-01
Journal:
Materials Science-Poland
scimago Q3
SJR: 0.226
CiteScore: 1.8
Impact factor: 1.3
ISSN: 01371339, 20831331, 2083134X
Abstract
Herein, based on the strengthening mechanism and aging mechanism of 9% Cr steel, changes in the microstructure and mechanical properties during long-term high-temperature service are analyzed. The limitations of current microstructure observation in the aging rating process and the defects of the aging evaluation system are expounded. It is proposed that the aging evaluation of 9% Cr martensitic heat-resistant steel can distinguish between the abnormal microstructure and the aging phenomenon occurring during long-term operation, and the combination of higher resolution microscopy observation such as laser confocal scanning microscopy with mechanical property tests could provide a comprehensive judgement.
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