材料工程2025，Vol.53Issue(8)：202-209,8.DOI:10.11868/j.issn.1001-4381.2024.000105
基于冷喷涂固态增材Al/Cu的高压电缆铝护套高质量修复
High quality reparation of Al sheath of high-voltage cable with Al/Cu by cold spray solid-state additive manufacturing
摘要
Abstract
Cold solid-state additive manufacturing is a potential solution for surface Al sheath layer connecting and repairing for the high-voltage cable due to its low processing temperature and high flexibility.However,the poor inter-particle bonding quality and high porosity makes the Al deposits present low adhesion strength and electrical conductivity.In this work,mechanically mixed Al/Cu powders are used as the feedstock powders.It is attempted to enhance the plastic deformation of the deposited Al particles through the in-situ hammering or forging of the Cu particles and thus decrease the porosity and increase the adhesion and electrical conductivity of the deposits.To study the effect of Cu content on microstructure and properties including adhesion,electrical conductivity and salt-fog corrosion resistance of the deposits,pure Al powder,Al/Cu mixed powders with Cu volumetric content of 10%,30%and 50%are cold sprayed.Results show that the deposits have more Cu particles than the corresponding feedstock powder due to the higher deposition efficiency of Cu.As the Cu content in the feedstock powders increases from 0%to 50%,the porosity of the Al/Cu composite deposits decreases from 14.4%to 0.2%,and the adhesion strength of the deposits increases from 24.2 MPa to 53.4 MPa.Significant increments in electrical conductivity of the deposits are achieved due to the inclusion of Cu and enhanced inter-particle bonding quality.However,it is found that due to galvanic corrosion between Cu particles and adjacent Al particles,the Cu-Al composite deposits experienced much more severe corrosion as compared with the pure Al deposit.To solve this problem,a bilayer deposit construction composed of Cu-Al composite bottom layer and pure Al top layer is proposed.The optimized bilayer deposit reveals comparable adhesion and electrical conductivity with the Cu-Al composite deposit while the salt-fog corrosion resistance is similar to that of the pure Al deposit.关键词
高压电缆/铝护套/附件修复/冷喷涂固态增材技术/Al/Cu复合沉积体/结合强度/电导率Key words
high-voltage cable/Al sheath/accessories reparation/cold spraying solid-state additive manufacturing/Cu-Al composite deposit/adhesion strength/electrical conductivity分类
通用工业技术引用本文复制引用
周宏,周韫捷,王瑛,傅爱军,杜增辉,雒晓涛..基于冷喷涂固态增材Al/Cu的高压电缆铝护套高质量修复[J].材料工程,2025,53(8):202-209,8.基金项目
国网上海市电力公司科学技术项目(52090W240001) （52090W240001）
