Ti添加对激光熔覆FeCoNiCr高熵合金涂层组织与性能的影响

doi:10.13251/j.issn.0254-6051.2026.01.048

金属热处理 ›› 2026, Vol. 51 ›› Issue (1): 317-324.DOI: 10.13251/j.issn.0254-6051.2026.01.048

Ti添加对激光熔覆FeCoNiCr高熵合金涂层组织与性能的影响

李谈^1,2, 程战¹, 周虎^1,3, 赵丹¹, 龙伟民¹, 关常勇⁴

1.中国机械总院集团宁波智能机床研究院有限公司, 浙江宁波 315700;
2.中国机械科学研究总院集团有限公司, 北京 100044;
3.宁波大学机械工程与力学学院, 浙江宁波 315211;
4.山东索力得焊材股份有限公司, 山东肥城 271612

收稿日期:2025-09-01 修回日期:2025-11-28 出版日期:2026-01-25 发布日期:2026-01-27
通讯作者: 程战,高级工程师,博士,E-mail: brazecheng@163.com
作者简介:李谈(2000—),男,硕士研究生,主要研究方向为金属材料的激光熔覆,E-mail: litan-2000@foxmail.com。
基金资助:
浙江省异质增材工程研究中心项目(CIE21010101);宁波市“3315”人才计划2020年创新团队C类(CIE20060105);浙江省“尖兵”计划(2024C01085)

Effect of Ti addition on microstructure and properties of FeCoNiCr high-entropy alloy coating by laser cladding

Li Tan^1,2, Cheng Zhan¹, Zhou Hu^1,3, Zhao Dan¹, Long Weimin¹, Guan Changyong⁴

1. China Academy of Machinery Ningbo Academy of Intelligent Machine Tool Co., Ltd., Ningbo Zhejiang 315700, China;
2. China Academy of Machinery Science and Technology Group Co., Ltd., Beijing 100044, China;
3. Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo Zhejiang 315211, China;
4. Shandong Solid Solder Co., Ltd., Feicheng Shandong 271612, China

Received:2025-09-01 Revised:2025-11-28 Online:2026-01-25 Published:2026-01-27

摘要/Abstract

摘要： 采用激光熔覆技术在42CrMo钢表面制备了FeCoNiCr与FeCoNiCrTi_0.5两种高熵合金涂层,比较研究了Ti的添加对涂层物相组成、显微组织、显微硬度、耐磨性和耐蚀性的影响。结果表明,FeCoNiCr涂层的显微组织由面心立方单相固溶体组成,而Ti的引入增大了晶格畸变,促使Laves相、χ相、σ相金属间化合物形成,同时细化了涂层的晶粒。Ti的添加通过固溶强化与第二相强化的协同作用显著提升了涂层的硬度。FeCoNiCrTi_0.5涂层的平均显微硬度为482.5 HV0.5,较FeCoNiCr涂层提升了61.43%。磨损试验结果表明,FeCoNiCrTi_0.5涂层的摩擦因数和质量磨损率分别降低至0.41和0.76×10^-7 g·(N·m)^-1,较FeCoNiCr涂层分别降低了31.67%和57.28%,耐磨性提升明显。同时,Ti的添加产生的多相结构略微降低了涂层的耐蚀性能,但在动电位极化试验与中性盐雾试验中,FeCoNiCrTi_0.5涂层腐蚀速率相对基体分别降低了99.89%与83.70%,表明FeCoNiCrTi_0.5涂层仍然可以对基体起到良好的保护作用。

关键词: 激光熔覆, 高熵合金, 显微组织, 硬度, 耐磨性, 耐蚀性

Abstract: FeCoNiCr and FeCoNiCrTi_0.5 high-entropy alloy (HEA) coatings were successfully fabricated on the surface of 42CrMo steel by using laser cladding (LC) technique. Effect of Ti addition on phase composition, microstructure, microhardness, wear resistance and corrosion resistance of the coatings was comparatively investigated. The results indicate that the microstructure of the FeCoNiCr coating consists of a face-centered cubic single-phase solid solution. Conversely, the introduction of Ti increases lattice distortion, promotes the formation of Laves, χ, and σ phase intermetallic compounds (IMCs), resulting in significant grain refinement. The addition of Ti significantly enhances the hardness of the coating through the synergistic effects of solid solution strengthening and second-phase strengthening. The average microhardness of the FeCoNiCrTi_0.5 coating is 482.5 HV0.5, which is 61.43% higher than that of the FeCoNiCr coating. Wear test results demonstrate that the friction coefficient and mass wear rate of the FeCoNiCrTi_0.5 coating decrease to 0.41 and 0.76×10^-7 g·(N·m)^-1, which are 31.67% and 57.28% lower than those of FeCoNiCr coating, respectively, indicating a significant improvement in wear resistance. Concurrently, the multi-phase structure resulting from the Ti addition slightly reduces the corrosion resistance of the coating. However, in potentiodynamic polarization and neutral salt spray tests, the corrosion rate of the FeCoNiCrTi_0.5 coating is reduced by 99.89% and 83.70%, respectively, relative to the substrate. This demonstrates that the FeCoNiCrTi_0.5 coating can still provide excellent protection for the substrate.

Key words: laser cladding, high-entropy alloy, microstructure, hardness, wear resistance, corrosion resistance

中图分类号:

TG174.44

李谈, 程战, 周虎, 赵丹, 龙伟民, 关常勇. Ti添加对激光熔覆FeCoNiCr高熵合金涂层组织与性能的影响[J]. 金属热处理, 2026, 51(1): 317-324.

Li Tan, Cheng Zhan, Zhou Hu, Zhao Dan, Long Weimin, Guan Changyong. Effect of Ti addition on microstructure and properties of FeCoNiCr high-entropy alloy coating by laser cladding[J]. Heat Treatment of Metals, 2026, 51(1): 317-324.

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Ti添加对激光熔覆FeCoNiCr高熵合金涂层组织与性能的影响

Effect of Ti addition on microstructure and properties of FeCoNiCr high-entropy alloy coating by laser cladding

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