SiC添加量对CoCrFeNi高熵合金涂层组织与性能的影响

doi:10.13251/j.issn.0254-6051.2024.06.032

金属热处理 ›› 2024, Vol. 49 ›› Issue (6): 198-205.DOI: 10.13251/j.issn.0254-6051.2024.06.032

SiC添加量对CoCrFeNi高熵合金涂层组织与性能的影响

蒋廷普¹, 孙荣禄^1,2, 牛伟^1,2, 杨佳伟¹

1.天津工业大学机械工程学院, 天津 300387;
2.天津市现代机电装备技术重点实验室, 天津 300387

收稿日期:2023-11-24 修回日期:2024-04-08 出版日期:2024-06-25 发布日期:2024-07-29
通讯作者: 孙荣禄,教授,博士,E-mail: rlsun@tiangong.edu.cn
作者简介:蒋廷普(1995—),男,硕士研究生,主要研究方向为金属表面改性,E-mail: 769313124@qq.com。
基金资助:
国家自然科学基金(51371125)

Effect of SiC addition on microstructure and properties of CoCrFeNi high entropy alloy coating

Jiang Tingpu¹, Sun Ronglu^1,2, Niu Wei^1,2, Yang Jiawei¹

1. School of Mechanical Engineering, Tiangong University, Tianjin 300387, China;
2. Tianjin Key Laboratory of Advanced Mechatronics Equipment Technology, Tianjin 300387, China

Received:2023-11-24 Revised:2024-04-08 Online:2024-06-25 Published:2024-07-29

摘要/Abstract

摘要： 通过RFL-C1000光纤激光器在45钢表面制备不同SiC添加量(0%、5%、10%、15%)的CoCrFeNi高熵合金涂层,采用OM、XRD、SEM和EDS分析涂层的宏观形貌、微观组织以及摩擦磨损形貌,并利用显微硬度计和摩擦磨损测试仪测量涂层的显微硬度和摩擦磨损性能。结果表明,SiC添加量为0%、5%、10%和15%涂层在第一道均略有突出,之后涂层的厚度较为平整。0%SiC涂层组织为单一FCC相,5%SiC涂层组织包含FCC树枝晶和富含C和Cr的枝晶间组织,10%SiC涂层包含FCC基体和(Cr,Fe)₇C₃,15%SiC涂层中包含BCC基体和条状或颗粒状的(Cr,Fe)₇C₃。随着SiC添加量的增大,高熵合金涂层的显微硬度和摩擦磨损性能逐步升高。当SiC添加量为15%时,高熵合金涂层的性能最优,平均显微硬度为1329.56 HV0.3,磨损量仅为0.8 mg。

关键词: 激光熔覆, 高熵合金, FCC, BCC, 显微硬度, 摩擦磨损性能

Abstract: Coatings of CoCrFeNi high entropy alloy with different SiC additions (0%, 5%, 10% and 15% by mass) were prepared on the surface of 45 steel by using RFL-C1000 fiber laser. The macro morphology, microstructure and wear morphology were analyzed by means of OM,XRD,SEM and EDS, and the microhardness, friction and wear property of the coatings were determined by using microhardness tester and friction-wear tester. The results show that all the coatings with 0%, 5%, 10% and 15%SiC additions are slightly prominent in the first pass, while the thickness of which formed in subsequent passes is relatively flat. The phase structure of 0%SiC coating is single FCC phase, while the 5%SiC coating contains FCC dendrites with interdendritic regions rich in C and Cr. The 10%SiC coating contains FCC matrix and (Cr, Fe)₇C₃, while the 15%SiC coating contains BCC matrix and (Cr, Fe)₇C₃ in the shape of strip or granular. As the addition of SiC increases, the microhardness and friction and wear properties of the high entropy alloy coating gradually increase. When the addition of SiC is 15%, the property of the high entropy alloy coating is optimal, with an average microhardness of 1329.56 HV0.3 and a wear mass loss of only 0.8 mg.

Key words: laser cladding, high entropy alloy, BCC, FCC, microhardness, friction and wear property

中图分类号:

TG174.4

蒋廷普, 孙荣禄, 牛伟, 杨佳伟. SiC添加量对CoCrFeNi高熵合金涂层组织与性能的影响[J]. 金属热处理, 2024, 49(6): 198-205.

Jiang Tingpu, Sun Ronglu, Niu Wei, Yang Jiawei. Effect of SiC addition on microstructure and properties of CoCrFeNi high entropy alloy coating[J]. Heat Treatment of Metals, 2024, 49(6): 198-205.

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SiC添加量对CoCrFeNi高熵合金涂层组织与性能的影响

Effect of SiC addition on microstructure and properties of CoCrFeNi high entropy alloy coating

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