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感應(yīng)加熱金剛石/鎳基復(fù)合涂層微觀組織與性能
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鄭州機(jī)械研究所有限公司 新型釬焊材料與技術(shù)國(guó)家重點(diǎn)實(shí)驗(yàn)室

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中圖分類(lèi)號(hào):

TG454

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國(guó)家自然科學(xué)基金資助(項(xiàng)目號(hào)U2004186)


Microstructure and properties of diamond/Ni-based composite coating by induction heating
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State Key Laboratory of Advanced Brazing Filler Metals and Technology,Zhengzhou Research Institute of Mechanical Engineering Zhengzhou

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    摘要:

    采用感應(yīng)加熱的方式,在65Mn鋼基體表面制備了金剛石質(zhì)量分?jǐn)?shù)為10%的的復(fù)合鎳基涂層,利用SEM、EPMA、XRD對(duì)釬涂接頭的微觀組織和相組成進(jìn)行了分析,研究了感應(yīng)釬涂中金剛石/釬料界面的元素?cái)U(kuò)散機(jī)制和形成機(jī)理。并利用干砂橡膠輪磨損試驗(yàn)機(jī)測(cè)試了涂層的耐磨性能,分析了金剛石/鎳基涂層的耐磨增強(qiáng)機(jī)制。結(jié)果表明,釬涂層中釬料合金物相主要為Ni4B3、(Ni,Fe)固溶體、Ni3Si2、CrB；金剛石與釬料合金發(fā)生了冶金反應(yīng),金剛石/釬料合金界面的C元素分布促使金剛石表面出現(xiàn)了雙層碳化物結(jié)構(gòu),分別為金剛石側(cè)的Cr3C2和在Cr3C2表面生長(zhǎng)的Cr7C3。金剛石復(fù)合涂層的耐磨性能顯著優(yōu)于鋼基體,涂層60min磨損失重僅0.25g,為鋼對(duì)比試樣磨損失重的1/12,金剛石在磨損過(guò)程中起到了阻擋犁溝擴(kuò)展的作用,涂層的失效機(jī)制為鎳基合金磨損和金剛石的脫落。

    Abstract:

    A composite Ni-based coating with diamond mass fraction of 10% was prepared on the surface of 65Mn steel by induction heating. The microstructure and phase composition of the brazing joint were analyzed by SEM, EPMA and XRD. The element diffusion mechanism and formation mechanism of diamond/filler interface in induction brazing were studied. The wear resistance of the coating was tested by dry sand rubber wheel wear tester, and the wear resistance enhancement mechanism of diamond/Ni-based coating was analyzed. The results show that the main phases of filler alloy in brazing coating are Ni4B3, (Ni, Fe) solid solution, Ni3Si2 and CrB. The diamond and the filler alloy react in metallurgy, and the distribution of C element at the interface of diamond/filler alloy causes the appearance of double layer carbide structure on diamond surface, which are Cr3C2 on diamond side and Cr7C3 on the surface of Cr3C2 respectively. The wear resistance of the diamond composite coating is significantly better than that of the steel substrate. The wear weight loss of the coating is only 0.25g in 60min, which is 1/12 of that of the steel contrast sample. Diamond plays a role in preventing furrow expansion during the wear process, and the failure mechanism of the coating is Ni-based alloy wear and diamond shedding.

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司浩,秦建,鐘素娟,龍偉民,路全彬,沈元?jiǎng)?感應(yīng)加熱金剛石/鎳基復(fù)合涂層微觀組織與性能[J].稀有金屬材料與工程,2023,52(3):1027~1035.[Si Hao, Qin Jian, Zhong Sujuan, Long Weimin, Lu Quanbin, Shen Yuanxun. Microstructure and properties of diamond/Ni-based composite coating by induction heating[J]. Rare Metal Materials and Engineering,2023,52(3):1027~1035.]
DOI：10.12442/j. issn.1002-185X.20220092

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  • 收稿日期:2022-01-28
  • 最后修改日期:2022-03-16
  • 錄用日期:2022-03-28
  • 在線(xiàn)發(fā)布日期: 2023-04-07
  • 出版日期: 2023-03-24