Microstructure and Corrosion Resistance of Laser Cladding FeMnNiCoCr High-Entropy Alloy Coatings

LIU Tao; ZHAO Lijuan; ZHUANG Mengya; JI Xiulin

doi:10.16080/j.issn1671–833x.2019.21.059

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Microstructure and Corrosion Resistance of Laser Cladding FeMnNiCoCr High-Entropy Alloy Coatings

更新时间：2025-10-30

- Microstructure and Corrosion Resistance of Laser Cladding FeMnNiCoCr High-Entropy Alloy Coatings
- Aeronautical Manufacturing Technology Vol. 62, Issue 21, Pages: 59-63(2019)
- 作者机构：
  
  河海大学机电工程学院,常州,213022
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671–833x.2019.21.059
  CLC：
- Published：2019
- 稿件说明：
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刘涛，赵立娟，庄梦雅，纪秀林. 激光熔覆FeMnNiCoCr高熵合金涂层的组织结构及腐蚀性能研究[J]. 航空制造技术, 2019, 62(21): 59-63.

LIU Tao, ZHAO Lijuan, ZHUANG Mengya, JI Xiulin. Microstructure and Corrosion Resistance of Laser Cladding FeMnNiCoCr High-Entropy Alloy Coatings. Aeronautical Manufacturing Technology, 2019, 62(21): 59-63.
刘涛，赵立娟，庄梦雅，纪秀林. 激光熔覆FeMnNiCoCr高熵合金涂层的组织结构及腐蚀性能研究[J]. 航空制造技术, 2019, 62(21): 59-63. DOI： 10.16080/j.issn1671–833x.2019.21.059.

LIU Tao, ZHAO Lijuan, ZHUANG Mengya, JI Xiulin. Microstructure and Corrosion Resistance of Laser Cladding FeMnNiCoCr High-Entropy Alloy Coatings. Aeronautical Manufacturing Technology, 2019, 62(21): 59-63. DOI： 10.16080/j.issn1671–833x.2019.21.059.

摘要

在Q345钢基体上，采用激光熔覆技术制备Fe

60-x

（x=10，12.5，15，20，25，30）高熵合金涂层，并研究Cr含量对涂层组织结构和耐蚀性的影响。借助X射线衍射仪和扫描电子显微镜分析高熵合金涂层的组织结构，同时通过显微硬度计和电化学工作站表征涂层的显微硬度和冲蚀磨损量。研究结果表明Cr10涂层仅由BCC相构成，其他涂层由简单的BCC和FCC两种相构成。随着Cr含量的增加，FCC相的含量先增多后减少，微观组织由较大的等轴晶变化到细小的树枝晶，再变化到较大的柱状晶。同时，涂层硬度也呈现先增大后减小，在Cr原子分数为20%时达到最大值（约500HV）。在3.5%NaCl溶液中的耐蚀性试验表明，Cr10涂层具有最小的腐蚀电流密度，Cr12.5具有最高的腐蚀电位。研究表明，激光熔敷高熵合金涂层Cr20具有最好的综合力学和耐腐蚀性能。

Abstract

The work aims to investigate the effect of Cr content of the coating on the microstructure and corrosion resistance of Fe

60-x

(x=10

12.5

30) high-entropy alloy coatings prepared by laser cladding technique on the Q345 steel substrate. The microstructure of the high-entropy alloy coating was analyzed by X-ray diffractometry and scanning electron microscopy. Meanwhile the microhardness and corrosion of the coating were characterized respectively by microhardness tester and electrochemical workstation. The results show that Cr10 coating consists only

of BCC phase

and other coatings consist of BCC and FCC phases. With the increase of Cr content

the content of FCC phase first increases and then decreases. The microstructure changes from large equiaxed crystal to fine dendrites

and then changes to larger columnar crystals. At the same time

the hardness of the coatings also increased first and then decreased

reaching a maximum value (~500HV) when the Cr atomic fraction was 20%. Corrosion resistance tests in 3.5% NaCl solution showed that the Cr10 coating had the lowest corrosion current density and Cr12.5 had the highest corrosion potential. Therefore

laser cladding high-entropy alloy coating Cr20 has good comprehensive mechanics and corrosion resistance.

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