x高熵合金涂層,研究了硼含量對(duì)激光熔覆FeCrNiCoMnBx高熵合金涂層的組織結(jié)構(gòu)、硬度和摩擦磨損性能的影響,以及硼化物中層錯(cuò)形成機(jī)制。結(jié)果表明：涂層均由簡(jiǎn)單FCC相和硼化物兩相組成。當(dāng)硼含量x≤0.75時(shí),生成的硼化物以 (Cr, Fe)2B相為主；而當(dāng)硼含量x=1時(shí),生成大量的(Fe, Cr)2B相。隨著硼含量的增加,涂層中的硼化物含量增加,硬度增大,耐磨性能增強(qiáng)。硼化物(Fe, Cr)2B相在(10)中存在大量堆垛層錯(cuò)。硼化物中的層錯(cuò)是(Fe, Cr)2B相通過(guò)(10) 面的層錯(cuò)(滑移距離為1/4[11])方式而向(Cr, Fe)2B相轉(zhuǎn)變而產(chǎn)生。"/>

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激光熔覆FeCrNiCoMnBx高熵合金涂層的組織結(jié)構(gòu)與性能
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福州大學(xué),福州大學(xué),福建工程學(xué)院,福建工程學(xué)院,福州大學(xué)

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中圖分類(lèi)號(hào):

TG113

基金項(xiàng)目:

福建省教育廳重點(diǎn)項(xiàng)目(JA11179),福建省高校產(chǎn)學(xué)合作重大項(xiàng)目(2012H6001),福建工程學(xué)院科研資助項(xiàng)目(E0600133)。


Microstructure and properties of FeCrNiCoMnBx high-entropy alloy coating prepared by laser cladding
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Fuzhou University,Fuzhou University,College of Fujian University of Technology,College of Fujian University of Technology,Fuzhou University

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    摘要:

    采用激光熔覆技術(shù)制備FeCrNiCoMnBx高熵合金涂層,研究了硼含量對(duì)激光熔覆FeCrNiCoMnBx高熵合金涂層的組織結(jié)構(gòu)、硬度和摩擦磨損性能的影響,以及硼化物中層錯(cuò)形成機(jī)制。結(jié)果表明：涂層均由簡(jiǎn)單FCC相和硼化物兩相組成。當(dāng)硼含量x≤0.75時(shí),生成的硼化物以 (Cr, Fe)2B相為主；而當(dāng)硼含量x=1時(shí),生成大量的(Fe, Cr)2B相。隨著硼含量的增加,涂層中的硼化物含量增加,硬度增大,耐磨性能增強(qiáng)。硼化物(Fe, Cr)2B相在(10)中存在大量堆垛層錯(cuò)。硼化物中的層錯(cuò)是(Fe, Cr)2B相通過(guò)(10) 面的層錯(cuò)(滑移距離為1/4[11])方式而向(Cr, Fe)2B相轉(zhuǎn)變而產(chǎn)生。

    Abstract:

    An FeCrNiCoMnBx high-entropy alloy coating was prepared by laser cladding on a low carbon steel substrate. The effect of boron addition on the microstructure, hardness, and wear resistance of FeCrNiCoMnBx was studied. The formation mechanism of stacking faults (SFs) in boride was analyzed. Results showed that the coatings had a simple FCC structure with boride precipitation. Boride precipitation was mainly the (Cr, Fe)2B phase when the boron content x was increased from 0.25 to 0.75. However, as the value of x reached 1.0, many (Fe, Cr)2B phases were found in the boride. The volume fraction of borides increased with the increase in boron content. Hardness and wear resistance of the coating were also enhanced with the increase in boron content. (Fe, Cr)2B borides had high-density SFs on the (10) planes. The generation of SFs in (Fe, Cr)2B occurred probably because of the (Fe, Cr)2B → (Cr, Fe)2B phase transformation generated by a simple shear of (Fe, Cr)2B (10) planes (with shear vectors at nearly 1/4 [111]).

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張沖,吳炳乾,王乾廷,陳鼎寧,戴品強(qiáng).激光熔覆FeCrNiCoMnBx高熵合金涂層的組織結(jié)構(gòu)與性能[J].稀有金屬材料與工程,2017,46(9):2639~2644.[Zhang Chong, Wu Bingqian, Wang Qianting, Chen Dingning, Dai Pinqiang. Microstructure and properties of FeCrNiCoMnBx high-entropy alloy coating prepared by laser cladding[J]. Rare Metal Materials and Engineering,2017,46(9):2639~2644.]
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  • 收稿日期:2015-06-06
  • 最后修改日期:2015-08-11
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2017-11-29
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