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一种钴基耐磨材料的高温氧化行为研究
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1.钢铁研究总院;2.中国航发贵阳发动机设计研究所;3.北京钢研高纳科技服份有限公司

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国家军品配套项目


Oxidation behavior of a cobalt-based wear-resistant alloy
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Central Iron and Steel Research Institute

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    摘要:

    研究了NbC颗粒增强钴基耐磨材料在950~1050℃空气中的氧化行为。合金在950℃下属于抗氧化级,1000℃下属于次抗氧化级,1050℃下属于弱抗氧化级,氧化动力学曲线基本上符合抛物线规律。合金表面形成由CoCr2O4、CoNb2O6、Cr2O3和Al2O3组成的混合氧化物层,基体中块状NbC的优先原位氧化行为造成氧化层厚度不均匀且疏松多孔。经过1050℃/100h氧化后,氧化层下方基体中形成贫Cr层,导致氧化皮剥落后无法重新形成具有保护作用的连续氧化膜。

    Abstract:

    The oxidation behavior of NbC particle-reinforced cobalt-based wear-resistant alloy in the air from 950 to 1050℃ was investigated. The alloy belonged to the oxidation-resistant level at 950°C, the sub-oxidation-resistant level at 1000°C, and the non-oxidation-resistant level at 1050℃. The oxidation kinetic curves basically complied with the parabolic law. A mixed oxide layer consisting of CoCr2O4, CoNb2O6, Cr2O3, and Al2O3 was established on the alloy surface. The preferential in-situ oxidation behavior of the blocky NbC phase in the matrix resulted in the loose porous oxide layer and a non-uniform thickness. After oxidation of 1050℃/100h, a Cr depletion zone was formed in the matrix below the oxide layer, leading to the inability to re-form a continuous and protective oxide film after oxide peeling.

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凌晨,李尚平,刘栋,侯杰,梁湘华,骆合力.一种钴基耐磨材料的高温氧化行为研究[J].稀有金属材料与工程,2023,52(5):1708~1716.[LingChen, LiShangping, LiuDong, HouJie, LiangXianghua,,LuoHeli. Oxidation behavior of a cobalt-based wear-resistant alloy[J]. Rare Metal Materials and Engineering,2023,52(5):1708~1716.]
DOI:10.12442/j. issn.1002-185X.20220863

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历史
  • 收稿日期:2022-11-02
  • 最后修改日期:2022-11-15
  • 录用日期:2022-11-24
  • 在线发布日期: 2023-06-08
  • 出版日期: 2023-05-29