Influence of Alloying Elements on the Microstructure and Properties of Cu-Ni based Fusion Cladding Layers

ZHOU Wenkun; DIAO Jianshuai; ZHANG Min; XUE Tianqi; MA Ke; MAO Wei; MA Hongwei

doi:10.7512/j.issn.1001-2303.2024.11.02

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Influence of Alloying Elements on the Microstructure and Properties of Cu-Ni based Fusion Cladding Layers
Vol. 54, Issue 11, Pages: 9-18(2024)
Received：10 August 2024，

Published：25 November 2024
DOI： 10.7512/j.issn.1001-2303.2024.11.02
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周文坤，刁健帅，张敏，等.合金元素对Cu-Ni基熔覆层组织和性能的影响［J］.电焊机，2024，54（11）：9-18. DOI： 10.7512/j.issn.1001-2303.2024.11.02.

ZHOU Wenkun, DIAO Jianshuai, ZHANG Min, et al.Influence of Alloying Elements on the Microstructure and Properties of Cu-Ni based Fusion Cladding Layers[J].Electric Welding Machine, 2024, 54(11): 9-18. DOI： 10.7512/j.issn.1001-2303.2024.11.02.

摘要

为改善高强钢的表面性能，利用电弧熔覆技术在X80钢表面制备了两种添加不同合金的铜基熔覆层，分别为Cu-Ni-Fe-Nb-W和Cu-Ni-Fe-Ti。采用OM、SEM、EDS、显微硬度计、摩擦磨损试验机以及电化学工作站等仪器设备研究了Nb-W、Ti等合金元素对Cu-Ni基熔覆层组织和性能的影响。结果表明，两组Cu-Ni基熔覆层的显微组织由底部到顶部均为平面晶、胞状晶、树枝晶和等轴晶，Nb-W和Ti均有细化Cu-Ni熔覆层组织的作用。Cu-Ni-Fe-Nb-W熔覆层的平均硬度值为161.9 HV0.1，Cu-Ni-Fe-Ti熔覆层的平均硬度值为176.4 HV0.1，且Cu-Ni-Fe-Ti熔覆层的摩擦系数和磨损量均低于Cu-Ni-Fe-Nb-W熔覆层，表明添加Nb-W和Ti能够提升熔覆层的力学性能，且添加Ti元素的效果要优于Nb-W元素。电化学测试表明，添加合金元素的Cu-Ni基熔覆层的耐蚀性要明显优于X80钢的耐蚀性，且Cu-Ni-Fe-Ti熔覆层的耐蚀性优于Cu-Ni-Fe-Nb-W熔覆层。

Abstract

To improve the surface properties of high-strength steel

two types of copper-based cladding layers with different added alloys were prepared on the surface of X80 steel using arc cladding technology

namely Cu-Ni-Fe-Nb-W and Cu-Ni-Fe-Ti. The effects of Nb-W and Ti alloy elements on the microstructure and properties of Cu-Ni-based cladding layers were studied using instruments such as OM

SEM

EDS

microhardness tester

friction and wear tester

and electrochemical workstation. The results show that the microstructure of the two groups of Cu-Ni-based cladding layers from bottom to top are planar crystals

cellular crystals

dendritic crystals

and equiaxed crystals

and both Nb-W and Ti have the effect of refining the Cu-Ni cladding layer structure. The average hardness value of the Cu-Ni-Fe-Nb-W cladding layer is 161.9 HV0.1

and the average hardness value of the Cu-Ni-Fe-Ti cladding layer is 176.4 HV0.1. The friction coefficient and wear amount of the Cu-Ni-Fe-Ti cladding layer are lower than those of the Cu-Ni-Fe-Nb-W cladding layer

indicating that the addition of Nb-W and Ti can improve the mechanical properties of the cladding layer

and the effect of adding Ti element is better than that of Nb-W element. Electrochemical tests show that the corrosion resistance of the Cu-Ni-based cladding layer with added alloy elements is significantly better than that of X80 steel

and the corrosion resistance of the Cu-Ni-Fe-Ti cladding layer is better than that of the Cu-Ni-Fe-Nb-W cladding layer.

关键词

Keywords

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