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粉末冶金材料科学与工程  2022, Vol. 27 Issue (5): 532-541    DOI: 10.19976/j.cnki.43-1448/TF.2022046
  工艺技术 本期目录 | 过刊浏览 | 高级检索 |
激光熔覆法制备WC-Co球粒强化高熵合金复合硬质涂层的组织与性能
蓝阳1, 马青原1, 杨紫涵1, 张文慧1, 彭英博1,2, 郑俊3, 张伟1, 刘惠仁4, 许雄亮4
1.中南大学 粉末冶金国家重点实验室,长沙 410083;
2.南京农业大学 工学院,南京 210031;
3.厦门理工学院 材料科学与工程学院,厦门 361024;
4.株洲金韦硬质合金有限公司,株洲 412100
Microstructure and properties of WC-Co pellet-strengthened high entropy alloy composite hard coatings prepared by laser cladding
LAN Yang1, MA Qingyuan1, YANG Zihan1, ZHANG Wenhui1, PENG Yingbo1,2, ZHENG Jun3, ZHANG Wei1, LIU Huiren4, XU Xiongliang4
1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China;
2. College of Engineering, Nanjing Agricultural University, Nanjing 210031, China;
3. School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China;
4. Zhuzhou Jinwei Cemented Carbide Co., Ltd., Zhuzhou 412100, China
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摘要 在FeCoCrNiMo0.15高熵合金(high entropy alloy, HEP)粉末中分别添加WC和WC-Co硬质相球粒,然后采用激光熔覆法在304不锈钢基材上制备2种以FeCoCrNiMo0.15高熵合金为基体的硬质复合涂层WC/HEA和WC-Co/HEA,研究这2种复合涂层的微观组织、硬度、耐磨与耐蚀性能,并与真空扩散焊制备的Ni60/WC复合涂层性能进行对比。结果表明,WC-Co/HEA涂层中WC颗粒的球形度高,涂层内气孔和裂纹较少,添加Co元素可有效避免激光熔覆过程中WC发生分解。WC/HEA和WC-Co/HEA复合涂层的平均显微硬度(HV)都在800 MPa以上,其中WC-Co/HEA涂层的平均显微硬度(882.55 MPa)高于WC/HEA涂层的硬度(817.27 MPa),且其平均摩擦因数(0.40)略低于WC/HEA涂层(0.46)。与Ni60/WC涂层相比,HEA基涂层对WC的保持性和润湿性更好,能降低涂层与WC之间的界面反应,因此WC-Co/HEA复合涂层的显微硬度、摩擦磨损性能、耐蚀性能均优于Ni60/WC和WC/HEA涂层。
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蓝阳
马青原
杨紫涵
张文慧
彭英博
郑俊
张伟
刘惠仁
许雄亮
关键词 高熵合金WC-Co球粒硬面涂层激光熔覆耐磨耐蚀性能    
Abstract:WC and WC-Co spherulite hard phases were added to FeCoCrNiMo0.15 high entropy alloy powder respectively, and WC/HEA and WC-Co/HEA high entropy alloy composite coatings prepared on 304 stainless steel substrate by laser cladding method, respectively. The microstructure, hardness, wear resistance and corrosion resistance of the two composite coatings were studied and compared with the properties of the Ni60/WC composite coatings prepared by vacuum diffusion welding. The results show that the WC particles in the WC-Co/HEA coating have high sphericity and few pores and cracks. Adding Co element can effectively avoid the decomposition of WC during the laser cladding process. The average microhardness (HV) of WC/HEA and WC-Co/HEA composite coatings are both above 800 MPa. The average microhardness (882.55 MPa) of WC-Co/HEA coating is higher than that of WC/HEA coating hardness (817.27 MPa), and the average friction factor (0.40) of WC-Co/HEA coating is slightly lower than that of the WC/HEA coating (0.46). Compared with Ni60/WC coating, HEA-based coating has better retention and wet tability to WC, which can reduce the interfacial reaction between coating and WC, so the microhardness of WC-Co/HEA composite coating, friction and wear performance, corrosion resistance are better than that of Ni60/WC and WC/HEA coatings.
Key wordshigh entropy alloy    WC-Co spheres    hard surface coating    laser cladding    abrasion resistance and corrosion resistance
收稿日期: 2022-04-06      出版日期: 2022-11-15
ZTFLH:  TG174.44  
基金资助:湖南省自然科学基金资助项目(2020JJ4738);湖南省科技创新计划资助项目(2021RC4070)
通讯作者: 张伟,副研究员,博士。电话:15873123460;E-mail: waycsu@csu.edu.cn。郑俊,教授,博士。电话:15396227878;E-mail: jason@3dmetalwerks.com   
引用本文:   
蓝阳, 马青原, 杨紫涵, 张文慧, 彭英博, 郑俊, 张伟, 刘惠仁, 许雄亮. 激光熔覆法制备WC-Co球粒强化高熵合金复合硬质涂层的组织与性能[J]. 粉末冶金材料科学与工程, 2022, 27(5): 532-541.
LAN Yang, MA Qingyuan, YANG Zihan, ZHANG Wenhui, PENG Yingbo, ZHENG Jun, ZHANG Wei, LIU Huiren, XU Xiongliang. Microstructure and properties of WC-Co pellet-strengthened high entropy alloy composite hard coatings prepared by laser cladding. Materials Science and Engineering of Powder Metallurgy, 2022, 27(5): 532-541.
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