渗氮处理对HVOF 喷涂Al1-xCoCrFeNiTix(x=0，0.125，0.250)高熵合金涂层组织结构和磨损性能的影响

郭禹尧, 周永宽, 朱丽娜, 康嘉杰, 马国政

doi:10.16577/j.issn.1001-1560.2023.0186

材料保护 >

2023 , Vol. 56 >Issue 8: 56 - 63

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0186

高熵合金涂层专栏

渗氮处理对HVOF 喷涂Al_1-xCoCrFeNiTi_x(x=0，0.125，0.250)高熵合金涂层组织结构和磨损性能的影响

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1.中国地质大学(北京) 工程技术学院，北京 100083；2.江苏科技大学材料科学与工程学院，江苏镇江 212100；3.中国地质大学(北京) 郑州研究院，河南郑州 451283；4.陆军装甲兵学院装备再制造技术国防科技重点实验室，北京 100072

周永宽(1993-)，博士后，博士，研究方向为高熵合金涂层摩擦磨损性能的研究，E-mail:yongkuanz＠163.com

收稿日期: 2023-06-15

修回日期: 2023-07-15

录用日期: 2023-08-12

网络出版日期: 2023-08-25

基金资助

国家重点研发计划(2022YFB3706600)；国家自然科学基金面上项目(52175196，52275218)资助

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Effect of Nitriding Treatment on the Microstructure and Wear Properties of HVOF Sprayed Al_1-xCoCrFeNiTi_x(x=0，0.125，0.250) High-Entropy Alloy Coatings

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1.School of Engineering Technology，China University of Geosciences (Beijing)，Beijing 100083，China；2.School of Materials Science and Engineering，Jiangsu University of Science and Technology，Zhenjiang 212100，China；3.Zhengzhou Research Institute，China University of Geosciences (Beijing)，Zhengzhou 451283，China；4.National Key Laboratory for Remanufacturing，Army Academy of Armored Forces，Beijing 100072，China

Received date: 2023-06-15

Revised date: 2023-07-15

Accepted date: 2023-08-12

Online published: 2023-08-25

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摘要

为了研究渗氮处理对HVOF 喷涂Al1-xCoCrFeNiTix(x＝0，0.125，0.250)高熵合金涂层组织结构和磨损性能的影响，采用HVOF 技术在35CrMo 钢基体上制备Al1-xCoCrFeNiTix(x＝0，0.125，0.250)高熵合金涂层，然后对其进行渗氮处理。利用SEM、XRD、三维白光干涉仪以及EDS 等表征手段研究了渗氮处理对HVOF 喷涂Al1-xCoCrFeNiTix(x＝0，0.125，0.250)高熵合金涂层组织结构和磨损性能的影响。结果表明:渗氮处理后的Al1-xCoCrFeNiTix(x＝0，0.125，0.250)高熵合金涂层组织结构致密，具有典型的热喷涂层状结构，厚度约为300 ～350 μm，氮化层厚度约为10 μm，氮化层相结构为FCC 相和AlN、CrN 等氮化物相，氮化层的显微硬度分别为981 HV2N(x＝0)、1 090 HV2N(x＝0.125)和1 194 HV2N(x＝0.250)，和未经渗氮处理过的高熵合金涂层的显微硬度479 HV2N(x＝0)、506 HV2N(x＝0.125)、548 HV2N(x＝0.250)相比有着显著的提升；并且随着Ti 含量的增加，氮化层的耐磨性增加，其中Al0.750CoCrFeNiTi0.250氮化层具有最优异的耐磨性能(2.17×10-6mm3·N-1·m-1)。Al1-xCoCrFeNiTix(x＝0，0.125，0.250)氮化层的磨损失效机理主要是磨粒磨损、氧化磨损和黏着磨损。

关键词： 渗氮; 高熵合金涂层; HVOF; 微观组织结构; 磨损

本文引用格式

郭禹尧, 周永宽, 朱丽娜, 康嘉杰, 马国政 . 渗氮处理对HVOF 喷涂Al_1-xCoCrFeNiTi_x(x=0，0.125，0.250)高熵合金涂层组织结构和磨损性能的影响[J]. 材料保护, 2023 , 56(8) : 56 -63 . DOI: 10.16577/j.issn.1001-1560.2023.0186

Abstract

For studying the effect of nitriding treatment on the microstructure and wear properties of HVOF sprayed Al1-xCoCrFeNiTix(x＝0，0.125，0.250) high-entropy alloy coatings，the HVOF technology was employed to prepare Al1-xCoCrFeNiTix(x＝0，0.125，0.250) highentropy alloy coating on 35CrMo steel substrate，which were further nitrided.The effects of nitriding treatment on the microstructure and wear properties of Al1-xCoCrFeNiTix(x＝0，0.125，0.250) high-entropy alloy coating prepared by HVOF were studied via characterization methods such as SEM，XRD，3D white light interferometer and EDS.Results showed that the high-entropy alloy coating of Al1-xCoCrFeNiTix(x＝0，0.125，0.250) after nitriding treatment had a dense microstructure with a typical thermal spray coating-like structure.The coating thickness was about 300～350 μm，the nitriding layer thickness was about 10 μm，and the nitriding layer phase structure was FCC phase and AlN，CrN and other nitriding phases.Meanwhile，the microhardness of the nitriding layer was 981 HV2N(x＝0)，1 090 HV2N(x＝0.125) and 1 194 HV2N(x＝0.250)，respectively，which was significantly improved compared with the microhardness of 479 HV2N(x＝0)，506 HV2N(x＝0.125) and 548 HV2N(x＝0.250) of the unnitrided high-entropy alloy coating.With the increase of Ti content，the wear resistance of the nitriding layer increased，and Al0.750CoCrFeNiTi0.250nitriding layer possessed the best wear resistance [(2.17×10-6mm3/(N·m)].Besides，the wear failure mechanism of Al1-xCoCrFeNiTix(x＝0，0.125，0.250) nitriding layer was mainly abrasive wear，oxidation wear and adhesive wear.

Key words： nitriding; high-entropy alloy coating; HVOF; microstructure; wear

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