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一種鈷基耐磨材料的高溫氧化行為研究
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1.鋼鐵研究總院;2.中國航發(fā)貴陽發(fā)動(dòng)機(jī)設(shè)計(jì)研究所;3.北京鋼研高納科技服份有限公司

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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顆粒增強(qiáng)鈷基耐磨材料在950~1050℃空氣中的氧化行為。合金在950℃下屬于抗氧化級(jí)，1000℃下屬于次抗氧化級(jí)，1050℃下屬于弱抗氧化級(jí)，氧化動(dòng)力學(xué)曲線基本上符合拋物線規(guī)律。合金表面形成由CoCr2O4、CoNb2O6、Cr2O3和Al2O3組成的混合氧化物層，基體中塊狀NbC的優(yōu)先原位氧化行為造成氧化層厚度不均勻且疏松多孔。經(jīng)過1050℃/100h氧化后，氧化層下方基體中形成貧Cr層，導(dǎo)致氧化皮剝落后無法重新形成具有保護(hù)作用的連續(xù)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,劉棟,侯杰,梁湘華,駱合力.一種鈷基耐磨材料的高溫氧化行為研究[J].稀有金屬材料與工程,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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歷史
  • 收稿日期:2022-11-02
  • 最后修改日期:2022-11-15
  • 錄用日期:2022-11-24
  • 在線發(fā)布日期: 2023-06-08
  • 出版日期: 2023-05-29