기계적 합금화 공정으로 제조된 Fe-14Cr Ferritic 산화물 분산 강화(ODS) 합금 강의 고온 산화 거동
(주)코리아스칼라
- 최초 등록일
- 2023.04.05
- 최종 저작일
- 2017.06
- 8페이지/ 어도비 PDF
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서지정보
ㆍ발행기관 : 한국분말야금학회
ㆍ수록지정보 : 한국분말야금학회지 / 24권 / 2호
ㆍ저자명 : 김영균, 박종관, 김휘준, 공만식, 이기안
영어 초록
This study investigates the oxidation properties of Fe-14Cr ferritic oxide-dispersion-strengthened (ODS) steel at various high temperatures (900, 1000, and 1100C for 24 h). The initial microstructure shows that no clear structural change occurs even under high-temperature heat treatment, and the average measured grain size is 0.4 and 1.1 m for the as-fabricated and heat-treated specimens, respectively. Y–Ti–O nanoclusters 10–50 nm in size are observed. High-temperature oxidation results show that the weight increases by 0.27 and 0.29 mg/cm2 for the asfabricated and heat-treated (900C) specimens, and by 0.47 and 0.50 mg/cm2 for the as-fabricated and heat-treated (1000C) specimens, respectively. Further, after 24 h oxidation tests, the weight increases by 56.50 and 100.60 mg/cm2 for the as-fabricated and heat-treated (1100C) specimens, respectively; the latter increase is approximately 100 times higher than that at 1000C. Observation of the surface after the oxidation test shows that Cr2O3 is the main oxide on a specimen tested at 1000C, whereas Fe2O3 and Fe3O4 phases also form on a specimen tested at 1100C, where the weight increases rapidly. The high-temperature oxidation behavior of Fe-14Cr ODS steel is confirmed to be dominated by changes in the Cr2O3 layer and generation of Fe-based oxides through evaporation.
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