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鐵基非晶增強(qiáng)碳化鎢涂層的微觀結(jié)構(gòu)與性能
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廣東省現(xiàn)代表面工程技術(shù)重點實驗室,現(xiàn)代材料表面工程技術(shù)國家工程實驗室,廣東省新材料研究所

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Microstructure and properties of WC-based coating reinforced by Fe-based amorphous alloys
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The key lab of Guangdong for Modern Surface Engineering Technology,National Engineering Laboratory for Modern Materials Surface Engineering Technology,Guangdong Institute of New Materials

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    摘要:

    采用超音速火焰噴涂技術(shù)制備了WC-CoCr/鐵基非晶復(fù)合涂層。比較研究了復(fù)合涂層和WC-CoCr的微觀形貌、硬度、耐磨性能、高溫氧化性能和腐蝕性能。XRD分析和SEM觀察表明,復(fù)合涂層主要由WC相、W2C相和鐵基非晶相組成。與WC-CoCr涂層相比,復(fù)合涂層的硬度有所降低,但是兩者沒有顯著性差異。由于硬度下降,導(dǎo)致復(fù)合涂層的耐磨性能略低于WC-CoCr涂層。800℃高溫氧化測試表明,復(fù)合涂層在800℃具有良好的熱穩(wěn)定性,這歸因于氧化過程中生成了一層致密的氧化膜。此外,復(fù)合涂層在3.5%氯化鈉溶液中的耐腐蝕性能也優(yōu)于WC-CoCr涂層。

    Abstract:

    WC-CoCr/ Fe-based amorphous alloy composite coating has been prepared by high velocity oxygen fuel (HVOF) spraying. Microstructure, hardness, wear resistance, high temperature oxidation and corrosion resistance of the composite coating are comparatively studied with WC-CoCr coating. XRD analysis and SEM observation show that the composite coating is mainly composed of WC, W2C and a Fe-based amorphous phase. In comparison with WC-CoCr coating, the hardness of the composite coating is slightly decreased, but there is no statistically significant difference between them. As a result of hardness decrease, the wear resistance of the composite coating is a little bit inferior to that of the WC-CoCr coating. Results of high temperature oxidation at 800 oC proved that the composite coating exhibits excellent thermal stability, which is mainly attributed to the formation of a dense and uniform oxide layer during the high temperature oxidation test. Moreover, electrochemical test revealed that the corrosion resistance of the composite coating is better than that of WC-CoCr coating in 3.5 wt.% NaCl solution.

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徐麗萍,宋進(jìn)兵,鄧暢光,劉敏,周克崧.鐵基非晶增強(qiáng)碳化鎢涂層的微觀結(jié)構(gòu)與性能[J].稀有金屬材料與工程,2020,49(5):1546~1552.[Xu Liping, Song Jinbing, Deng Changguang, Liu Min, Zhou Kesong. Microstructure and properties of WC-based coating reinforced by Fe-based amorphous alloys[J]. Rare Metal Materials and Engineering,2020,49(5):1546~1552.]
DOI:10.12442/j. issn.1002-185X.20181278

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  • 收稿日期:2018-12-22
  • 最后修改日期:2019-04-09
  • 錄用日期:2019-04-10
  • 在線發(fā)布日期: 2020-06-05
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