2復(fù)合相增強(qiáng)復(fù)合涂層。對(duì)比分析了氧化前后復(fù)合涂層的顯微組織，測(cè)試了復(fù)合涂層的顯微硬度分布，測(cè)試并擬合了復(fù)合涂層的氧化動(dòng)力學(xué)曲線，探討了復(fù)合涂層的氧化機(jī)理。結(jié)果表明：復(fù)合涂層典型顯微組織由TiC-MoSi2復(fù)合相、初生TiC枝晶和γ-(Ni,Fe)/NiSi2共晶構(gòu)成，TiC-MoSi2復(fù)合相和初生TiC枝晶作為復(fù)合涂層的增強(qiáng)相均勻分布在γ-(Ni,Fe)/NiSi2共晶基體上。由于TiC-MoSi2復(fù)合相的增強(qiáng)作用以及超細(xì)γ-(Ni,Fe)/NiSi2共晶基體的粘結(jié)和支撐作用，復(fù)合涂層具有高且均勻的硬度分布、良好的強(qiáng)度和韌性。得益于獨(dú)特的顯微組織，復(fù)合涂層表現(xiàn)出良好的高溫抗氧化性。"/>

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轉(zhuǎn)移等離子弧熔敷TiC-MoSi2 增強(qiáng)復(fù)合涂層顯微組織及抗氧化性
作者:
作者單位:

1.北京交通大學(xué) 機(jī)械與電子控制工程學(xué)院 材料科學(xué)與工程研究中心，北京 100044;2.河南科技大學(xué) 高端軸承摩擦學(xué)技術(shù)與應(yīng)用國家地方聯(lián)合工程實(shí)驗(yàn)室，河南 洛陽 471003

作者簡(jiǎn)介:

通訊作者:

中圖分類號(hào):

基金項(xiàng)目:

The Open Fund of National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology (201904) and the Fundamental Research Funds for the Central Universities (2019JBZ106)


Microstructure and Oxidation Performance of TiC-MoSi2 Reinforced Composite Coating Prepared by Plasma Tran-sferred Arc Cladding
Author:
Affiliation:

1.Materials Science and Engineering Research Center, School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China;2.National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science & Technology, Luoyang 471003, China

Fund Project:

Open Fund of National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology (201904); Fundamental Research Funds for the Central Universities (2019JBZ106)

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    摘要:

    為了提高AISI 304不銹鋼的高溫抗氧化性及耐磨性，利用轉(zhuǎn)移等離子弧熔敷技術(shù)在AISI 304基材表面制備了TiC-MoSi2復(fù)合相增強(qiáng)復(fù)合涂層。對(duì)比分析了氧化前后復(fù)合涂層的顯微組織，測(cè)試了復(fù)合涂層的顯微硬度分布，測(cè)試并擬合了復(fù)合涂層的氧化動(dòng)力學(xué)曲線，探討了復(fù)合涂層的氧化機(jī)理。結(jié)果表明：復(fù)合涂層典型顯微組織由TiC-MoSi2復(fù)合相、初生TiC枝晶和γ-(Ni,Fe)/NiSi2共晶構(gòu)成，TiC-MoSi2復(fù)合相和初生TiC枝晶作為復(fù)合涂層的增強(qiáng)相均勻分布在γ-(Ni,Fe)/NiSi2共晶基體上。由于TiC-MoSi2復(fù)合相的增強(qiáng)作用以及超細(xì)γ-(Ni,Fe)/NiSi2共晶基體的粘結(jié)和支撐作用，復(fù)合涂層具有高且均勻的硬度分布、良好的強(qiáng)度和韌性。得益于獨(dú)特的顯微組織，復(fù)合涂層表現(xiàn)出良好的高溫抗氧化性。

    Abstract:

    In order to improve the oxidation resistance and wear properties of AISI 304, a TiC-MoSi2 complex phase enhanced composite coating was designed and in-situ prepared on AISI 304 substrate by plasma transferred arc (PTA) cladding technique. Microstructure of the composite coating before and after oxidation was analyzed. The hardness distribution of the coating was tested. The oxidation kinetics curves of the coating were measured and fitted. The oxidation mechanism of the coating was discussed. Results show that typical microstructure of the composite coating consists of TiC-MoSi2 complex phases, primary TiC dendrites and γ-(Ni, Fe)/NiSi2 eutectics. The TiC-MoSi2 complex phases and TiC dendrites as reinforcing phases are uniformly distributed on the γ-(Ni, Fe)/NiSi2 eutectic matrix. Due to the strengthening effect of the TiC-MoSi2 complex phases and the binding and supporting action of the ultrafine γ-(Ni,Fe)/NiSi2 eutectic matrix, the composite coating exhibits high and uniform hardness distribution, good strength and toughness. Thanks to its unique microstructure, the composite coating shows good oxidation resistance.

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石晨曉,劉元富,張樂樂,陳德強(qiáng),張政,劉志宏.轉(zhuǎn)移等離子弧熔敷TiC-MoSi2 增強(qiáng)復(fù)合涂層顯微組織及抗氧化性[J].稀有金屬材料與工程,2021,50(8):2686~2693.[Shi Chenxiao, Liu Yuanfu, Zhang Lele, Chen Deqiang, Zhang Zheng, Liu Zhihong. Microstructure and Oxidation Performance of TiC-MoSi2 Reinforced Composite Coating Prepared by Plasma Tran-sferred Arc Cladding[J]. Rare Metal Materials and Engineering,2021,50(8):2686~2693.]
DOI：10.12442/j. issn.1002-185X.20200446

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  • 收稿日期:2020-06-24
  • 最后修改日期:2020-09-15
  • 錄用日期:2020-09-15
  • 在線發(fā)布日期: 2021-09-07
  • 出版日期: 2021-08-31