纯铜触头表面激光熔覆铜基合金的性能试验研究  

Experimental Study on the Properties of Laser Cladding Copper-Base Alloy on Pure Copper Contact Surface

作　　者：薛守洪 李保坤 叶海龙 陈燕 张书慧 XUE Shouhong;LI Baokun;YE Hailong;CHEN Yan;ZHAN Shuhui(Inner Mongolia Power Research Institute Branch of Inner Mongolia Power(Group)Co.,Ltd.,Hohhot 010020,China;Energy Transfer Conversion and System of North China Electric Power University,Beijing 100000,China;Inner Mongolia Power(Group)Co.,Ltd.,Bayannur Power Branch,Bayannur 015099,China)

机构地区：[1]内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司,呼和浩特010020 [2]华北电力大学电站能量传递转化与系统教育部重点试验室,东方电气(天津)风电叶片工程有限公司,北京100000 [3]内蒙古电力(集团)有限责任公司巴彦淖尔供电分公司,内蒙古巴彦淖尔015099

出　　处：《电工材料》2024年第1期19-25,共7页Electrical Engineering Materials

基　　金：变电站隔离开关激光熔覆涂层制备及性能研究(项目编号:DK-ZXZB-2020-HJ0402-0503)。

摘　　要：为提高纯铜触头的耐磨损耐腐蚀性能,利用激光熔覆技术在纯铜基体表面制备了不同钨含量的Cu-W-Ni合金熔覆层。对熔覆层的微观形貌、成分分布、硬度以及耐蚀性进行了分析。结果表明,熔覆层与纯铜基体表面为冶金结合,无孔洞、裂纹等缺陷。在保证芯部纯铜基体电导率的前提下,显著提高了触头的表面硬度和耐蚀性。此外,随着W含量的增加,熔覆层的硬度不断提高,但同时缺陷增多,导电性下降。Arc ablation is the main reason for the failure of pure copper switches.In order to improve the electric ablation resistance of pure copper contacts,Cu-W-Ni alloy cladding layers with different W contents were prepared on the surface of pure copper matrix by laser cladding technology.The microstructure,composition distribution,hardness and corrosion resistance of the cladding layer were analyzed.The results show that the cladding layer and the surface of the pure copper substrate are metallurgically bonded,without defects such as holes and cracks.On the premise of ensuring the electrical conductivity of the pure copper matrix in the core,the laser cladding layer significantly improves the surface hardness and corrosion resistance of the contacts.In addition,with the increase of W content,the hardness of the cladding layer increases continuously while the defects increase and the electrical conductivity decreases.

关 键 词：激光熔覆 铜基合金 微观组织 耐蚀性 耐磨性 

分 类 号：TG17[金属学及工艺—金属表面处理]