电焊机2025，Vol.55Issue(11)：31-36,6.DOI:10.7512/j.issn.1001-2303.2025.11.05
基于CoCrFeNi高熵合金焊丝的紫铜激光熔覆工艺研究
Study on Laser Cladding Technology of Copper based on CoCrFeNi High Entropy Alloy Welding Wire
摘要
Abstract
To address the challenges associated with joining dissimilar metals due to differences in their physical and chemi-cal properties,this study employs laser cladding technology to deposit a CoCrFeNi high-entropy alloy coating onto the sur-face of T2 copper.The effects of key process parameters,including wire feed speed and welding speed,on the morphology and bonding quality of the cladding layer are systematically investigated.The results indicate that the wire feed speed signifi-cantly influences the morphology of the cladding layer.Optimal parameters—specifically,a wire feed speed of 11.7 mm/s,a welding speed of 1.43 mm/s,and a laser power of 2 100 W—yield a continuous and uniform weld free of cracks and pores.Microstructural analysis confirms a sound metallurgical bond between copper and the high-entropy alloy without defects at the interface.The main elements in the coating zone align with the compositional characteristics of high-entropy alloys,and the dilution rate is approximately 32%.Microhardness tests demonstrate that the coating region reaches a hardness of up to 193.4 HV,significantly higher than that of the copper substrate(～50 HV),thereby effectively enhancing the surface mechani-cal properties.This study demonstrates that using a high-entropy alloy as an intermediate layer enables reliable joining of copper to dissimilar materials,offering a promising approach for manufacturing hybrid structures in applications such as heat dissipation components for electronic devices.关键词
异种材料/激光熔覆/过渡层/冶金性/微观组织Key words
dissimilar materials/laser welding/transition layer/metallurgy/microstructure分类
矿业与冶金引用本文复制引用
郑逸飞,蔡智会,冯道臣,李敏,张才,吴丹玲,郑文健..基于CoCrFeNi高熵合金焊丝的紫铜激光熔覆工艺研究[J].电焊机,2025,55(11):31-36,6.基金项目
温州市市场监督管理局科技计划项目(2023011) （2023011）
