金属热处理 ›› 2021, Vol. 46 ›› Issue (4): 60-64.DOI: 10.13251/j.issn.0254-6051.2021.04.010

• 组织与性能 • 上一篇    下一篇

Fe-Cr-Al电热合金的高温氧化行为

刘威1,2, 邵兴明2, 季勇华1, 许万剑1, 陈杰2, 王树平2   

  1. 1.上海大学 材料科学与工程学院, 上海 200444;
    2.江苏新华合金有限公司, 江苏 泰州 225722
  • 收稿日期:2020-10-10 出版日期:2021-04-25 发布日期:2021-05-08
  • 作者简介:刘威(1986—),男,硕士,主要研究方向为电热合金和高温合金,E-mail:394524921@qq.com

High-temperature oxidation behavior of Fe-Cr-Al electrothermal alloy

Liu Wei1,2, Shao Xinming2, Ji Yonghua1, Xu Wanjian1, Chen Jie2, Wang Shuping2   

  1. 1. School of Materials Science and Engineering, Shanghai University, Shanghai 200444, China;
    2. Jiangsu Xinhua Alloy Co., Ltd., Taizhou Jiangsu 225722, China
  • Received:2020-10-10 Online:2021-04-25 Published:2021-05-08

摘要: 对一种Fe-Cr-Al系电热合金0Cr25Al5进行了不同温度(950、1050、1150 ℃)的氧化质量增加试验。结果表明,合金试样在950 ℃下属于完全抗氧化级,在1050 ℃下属于抗氧化级,在1150 ℃下保温40 h以上时,由于Cr2O3的氧化挥发导致氧化膜出现空洞,大大降低了合金的抗氧化性能。XRD物相分析表明合金表面氧化膜主要由TiO2、Al2O3和FeCr2O4组成。

关键词: Fe-Cr-Al电热合金, 高温氧化, 氧化动力学, 氧化物组成

Abstract: Oxidation mass gain test was conducted for Fe-Cr-Al electrothermal alloy 0Cr25Al5 at 950, 1050 and 1150 ℃, respectively. The results show that the alloy belongs to the complete oxidation resistance class at 950 ℃ and oxidation resistance class at 1050 ℃. When oxidized at 1150 ℃ for more than 40 h, the oxidation resistance of the alloy is greatly reduced because of the voids appear in the oxide film of the alloy due to the evaporation of Cr2O3. The XRD analysis result shows that the oxide film on the alloy surface is mainly composed of TiO2, Al2O3 and FeCr2O4.

Key words: Fe-Cr-Al electrothermal alloy, high temperature oxidation, oxidation kinetics, oxide composition

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