粉末冶金制备22Cr-ODS合金的高温氧化行为研究
High Temperature Oxidation Behavior of 22Cr-ODS Alloy Prepared by Powder Metallurgy
- 2024年54卷第4期 页码:29-35
收稿:2023-05-24,
修回:2023-11-21,
纸质出版:2024-04-25
DOI: 10.7512/j.issn.1001-2303.2024.04.04
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收稿:2023-05-24,
修回:2023-11-21,
纸质出版:2024-04-25
移动端阅览
采用粉末冶金热等静压工艺制备了氧化物弥散强化FeCrAl合金,探究在1 000 ℃空气环境中合金的高温氧化行为。通过X射线衍射、扫描电子显微镜等对合金在1 000 ℃氧化不同时间后的氧化层表面成分、物相及截面成分、厚度等进行研究,结果表明:该工艺制备的22Cr-ODS合金在1 000 ℃空气环境中能够形成完整致密的α-Al
2
O
3
表面氧化层,氧化10 h、25 h、50 h、100 h、200 h后氧化层厚度分别为0.52 μm、0.91 μm、1.42 μm、1.47 μm和1.76 μm,合金内部晶粒未发生明显粗化,表明该合金具有良好的高温抗氧化性能和组织稳定性。
The high temperature oxidation behavior of FeCrAl alloy prepared by hot isostatic pressing by powder metallurgy at 1 000 ℃ was investigated. The surface and cross-section of the oxide layer after oxidation at 1 000 ℃ were studied by X-ray diffraction and scanning electron microscope. The results show that the 22Cr-ODS alloy prepared by this process can form a complete and dense surface oxide layer at 1000 ℃
and the oxide layer is mainly composed of α-Al
2
O
3
. After 10 h
25 h
50 h
100 h and 200 h of oxidation
the thickness of the oxide layer is about 0.52 μm
0.91 μm
1.42 μm
1.47 μm and 1.76 μm
respectively. The internal grain size of the alloy did not coarsen significantly during oxidation at 1 000 ℃. The alloy has good high-temperature oxidation resistance and organizational stability during the high-tem
perature service.
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