| Fe-2.3%Cr-1.6%W 합금의 고온산화 부식속도와 스케일 분석 |
| 박상환, 김민정, 이재호, 봉성준, 김슬기, 이동복 |
| 성균관대학교 신소재공학부 |
| High-temperature Oxidation Kinetics and Scales Formed on Fe-2.3%Cr-1.6%W Alloy |
| Sang-Hwan Bak, Min-Jung Kim, Jae-Ho Lee, Sung-June Bong, Seul-Ki Kim, Dong-Bok Lee |
| School of Advanced Materials Science and Engineering, SungkyunkwanUniversity |
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| ABSTRACT |
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The T23 steel, whose composition was Fe-2.3%Cr-1.6%W, was arc-melted, and oxidized between $600^{circ}C$ and $900^{circ}C$ in air for up to 7 months. The amount of precipitates in the arc-melted microstructure was as large as 11.4 vol.%. The precipitates increased the oxidation rate of the arc-melted T23 steel. Owing to the low amount of Cr in the T23 steel, breakaway oxidation occurred after a few hours during oxidation above $700^{circ}C$ in both arc-melted and as-received T23 steels. The scales that formed on arc-melted and as-received T23 steels were similar to each other. They consisted primarily of the outer $Fe_2O_3$ layer and the inner ($Fe_2O_3$, $FeCr_2O_4$)-mixed layer. The precipitates increased the microhardness and the oxidation rates. |
| Key words:
Oxidation, Steel, Scale, Iron, Chromium, Tungsten |
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