Author:
Huang Sheng-Yao,Tsai Wen-Ta,Pan Yeong-Tsuen,Kuo Jui-Chao,Chen Hsien-Wei,Lin Dong-Yih
Abstract
The oxidation behavior of 22Cr25NiWCoCu stainless steel with 0–0.86 wt.% Nb addition was investigated at 900 °C in air. With an increase in Nb addition, the volume fraction and average particle size of Nb (C, N) increased, but the grain size decreased. The results of grazing incidence X-ray diffraction indicated that the steels with Nb additions promoted Cr2O3 formation. After 10–100 h of oxidation, Cr depletion occurred at the region with Nb (C, N) precipitates because of its high Cr consumption rate, leading to Fe oxide generation. Finally, after 100 h of oxidation, the outer layer of Fe2O3 and the inner layer of (Cr, Fe, Mn)3O4 were formed.
Funder
Ministry of Science and Technology
Subject
General Materials Science,Metals and Alloys
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