Reason for negative effect of Nb addition on oxidation resistance of alumina-forming austenitic stainless steel at 1323 K

被引：23
|
作者：
Shen, Lin [1 ]
Wu, Bingjie [2 ]
Zhao, Kai [1 ]
Peng, Huabei [1 ]
Wen, Yuhua [1 ]
机构：
[1] Sichuan Univ, Sch Mech Engn, Chengdu 610065, Peoples R China
[2] Nucl Power Inst China, Key Lab Nucl Reactor Syst Design Technol, Chengdu 610041, Peoples R China
来源：
CORROSION SCIENCE | 2021年 / 191卷
关键词：
Alumina-forming austenitic stainless steel; Oxidation resistance; Nb addition; Aging treatment; CREEP-RESISTANT; CORROSION BEHAVIOR; SCALE FORMATION; TEMPERATURE; PRECIPITATION; ALLOY; PHASE;
D O I：
10.1016/j.corsci.2021.109754
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
To know reason for negative effect of Nb addition on oxidation resistance in alumina-forming austenitic stainless steels at high temperature, effects of Nb addition on microstructural evolution and oxidation resistance were investigated in Fe-25Ni-10Cr-4.5Al based steels after oxidation at 1323 K. The results showed that the degraded oxidation resistance due to the Nb addition resulted from suppressed outward diffusion of Al atoms by formation of Fe2Nb phase. Pre-aging at 1223 K could improve the oxidation resistance of the Nb-containing Fe-25Ni-10Cr-4.5Al steel due to the pre-precipitated B2-NiAl phase.
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页数：9
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