Laser-Cladding Cu-Cr-X Coating on Cu Alloy for Longer Service Life in Electrical Applications

被引：0

作者：

Li, Xing ^{[1
]}

Lu, Lekang ^{[1
]}

Fang, Jiashu ^{[2
]}

Liang, Junjia ^{[1
]}

Yang, Yesong ^{[1
]}

Zhao, Xiaojun ^{[1
,3
]}

Liu, Sainan ^{[4
]}

Xiao, Lairong ^{[1
,3
]}

Cai, Zhenyang ^{[1
,3
]}

机构：

[1] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

[2] Cent South Univ, Powder Met Res Inst, Changsha 410083, Peoples R China

[3] Cent South Univ, Key Lab Nonferrous Met Mat Sci & Engn, Minist Educ, Changsha 410083, Peoples R China

[4] Cent South Univ, Sch Resource Proc & Bioengn, Changsha 410083, Peoples R China

来源：

MATERIALS | 2025年 / 18卷 / 05期

关键词：

Cu-Cr-X coating; laser-cladding; wear resistance; service life; MICROSTRUCTURE;

D O I：

10.3390/ma18051103

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Advancements in electrical components have intensified the challenges for copper alloy wear resistance and high-temperature performance in electrical applications. The surface coating preparation of Cu alloys is crucial for enhancing their lifespan and promoting sustainable resource development. This study explored the microstructure and properties of Cu-Cr-X coatings (X = Mo/W, Al2O3/TiO2) on Cu alloy substrates via laser-cladding to improve wear resistance and hardness, vital for electrical component reliability and switching capacity. The process involved adjusting the power and reinforcing the phase particle size. The results showed hardness > 110 HV for all coatings (vs. 67.4 HV for the substrate). Cu-Cr-W achieved the highest hardness at 179 HV due to W dispersion and WCr precipitate reinforcement. It also maintained a stable CoF and the lowest wear rate (1.87 mg/km), with a fivefold wear resistance compared to the substrate alone. Cu-Cr-W excelled in lifespan extension and material loss reduction due to superior hardness, wear resistance, and conductivity.

引用

页数：13