CoCrFeNiCu高熵合金涂层的激光熔覆制备及其组织和耐磨性能研究
PDF下载 (113)章 伟,束学道,邓益民.CoCrFeNiCu高熵合金涂层的激光熔覆制备及其组织和耐磨性能研究[J].宁波大学学报(理工版),2024,37(4):95-102.DOI:10.20098/j.cnki.1001-5132.2023.1006
ZHANG Wei,SHU Xuedao,DENG Yimin.Preparation, microstructure and wear resistance properties of CoCrFeNiCu high-entropy alloy coating by laser cladding[J].Journal of Ningbo University(Natural Science & Engineering Edition),2024,37(4):95-102.DOI:10.20098/j.cnki.1001-5132.2023.1006
| Title: | Preparation, microstructure and wear resistance properties of CoCrFeNiCu high-entropy alloy coating by laser cladding |
| 作者: | 章 伟, 束学道, 邓益民 |
| Author(s): | ZHANG Wei, SHU Xuedao, DENG Yimin |
| 关键词: | 高熵合金; 激光熔覆; 微观组织; 耐磨性 |
| Keywords: | high entropy alloy; laser cladding; microstructure; wear resistance |
| 分类号: | TG174.44 |
| DOI: | 10.20098/j.cnki.1001-5132.2023.1006 |
| 文献标识码: | A |
| 摘要: | 采用同步送粉的方法在45号钢表面通过激光熔覆制备了CoCrFeNiCu高熵合金涂层, 系统探究了激光功率对激光熔覆CoCrFeNiCu高熵合金涂层组织及耐磨性能的影响, 利用X射线衍射仪(XRD)、光学显微镜(OM)、扫描电镜(SEM)、电子能谱(EDS)、维氏硬度计、多功能摩擦磨损试验机, 对不同功率下高熵合金涂层的组织、相组成结构、力学性能等进行了表征与测试. 结果显示, 在不同激光功率下, 涂层的相结构只有FCC相, 表明激光功率并未改变涂层的相组成结构. 随着激光功率的增大, 涂层顶部由枝晶向胞状晶转变, 底部由柱状晶向胞状晶再向柱状晶转变, 在1700W下涂层获得的晶粒较均匀致密; 随着功率继续增大, 晶粒有长大趋势; 涂层的显微硬度先升高后降低, 在1700W达到最高值202 HV0.2, 在1700W下涂层的磨损体积仅有0.03856mm3, 耐磨性达到最佳. |
| Abstract: | CoCrFeNiCu high-entropy alloy coating was prepared by laser cladding on the surface of 45 steel with synchronous powder feeding method. The effects of laser power on the microstructure and wear resistance properties of CoCrFeNiCu high-entropy alloy coating were systematically investigated. The microstructure, phase composition and mechanical properties of the high entropy alloy coating were characterized and tested by X-ray diffractometer (XRD), optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), Vickers hardness tester and multifunctional friction and wear testing machine. The results show that the coating is of only FCC phase under different laser power, indicating that the laser power does not change the phase composition of the coating. With the increase of laser power, the upper part of the coating changes from dendrites to cellular crystals, and the lower part changes from columnar crystals to cellular crystals and then to columnar crystals again. The crystal grains of the coating are uniform and dense at 1700W of laser power. As the power increases, the grain size tends to grow as well. With the increase of laser power, the microhardness of the coating increases first and then decreases gradually, with the highest value being 202 HV0.2 at 1700W of laser power. At 1700W of laser power, the wear volume of the coating is only 0.03856mm3, and the wear resistance reaches the best. |
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| 备注/Memo: | 收稿日期: 2023−10−09. 宁波大学学报（理工版）网址: http://journallg.nbu.edu.cn/ 基金项目: 宁波市“科技创新2025”重大专项（2022Z015）; 宁波市重大科技专项（2022Z055）. 第一作者: 章伟, 硕士研究生, 主要研究方向: 激光熔覆. E-mail: 1148156165@qq.com *通信作者: 邓益民, 博士/教授, 主要研究方向: 设计理论与方法. E-mail: dengyimin@nbu.edu.cn 宁波大学学报（理工版）网址：http://journallg.nbu.edu.cn/ |
