纳米改性涂层及焊接工艺参数对无镀铜实心焊丝导电嘴磨损影响的研究进展  

Progress in Effect of Nano-modified Coatings and Welding Process Parameters on Wear of Contact Tube for Non-copper Coated Solid Wires

作　　者：栗卓新[1] 万千 张天理[1] TILLMAN Wolfgang LI Zhuo-xin;WAN Qian;ZHANG Tian-li(College of Materials Science and Engineering,Beijing University of Technology, Beijing 100124 ,China;Institute of Materials Engineering,Dortmund University of Technology,Dortmund 24427 ,Germany)

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]多特蒙德工业大学材料工程研究所,德国多特蒙德24427

出　　处：《材料工程》2017年第12期135-146,共12页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目(51574011);北京市自然科学基金项目(2152008)

摘　　要：环保型无镀铜实心焊丝是气保护实心焊丝发展的主要趋势,而导电嘴磨损是其应用的瓶颈,综述了无镀铜实心焊丝表面纳米改性涂层及焊接工艺参数对导电嘴磨损的影响,认为:纳米颗粒在无镀铜实心焊丝与导电嘴的摩擦界面形成摩擦反应膜可以减少导电嘴的磨损;纳米改性涂层可使焊丝表面的油膜具有优异的润滑、导电、导热三重特性,是减少导电嘴磨损的可行途径;导电嘴的磨损随焊接电流的升高而增大,直流反接(Direct-current Electrode Positive,DCEP)时导电嘴的磨损比直流正接(Direct-current Electrode Negative,DCEN)时严重;电弧烧蚀和电流腐蚀是导电嘴磨损的主要机制。Environment-friendly non-copper coated solid wire is the main developing trend for gas shielded solid wires,whereas wear of contact tube limits their wide application.The effect of nano-modified coatings and welding process parameters on wear of contact tube for non-copper coated solid wires was reviewed.It was found that the wear of contact tube can be reduced due to the formation of tribo-films on the rubbing surfaces of welding wires against contact tube;it is feasible to decrease con-tact tube wear when non-copper coated solid wires are coated with nano-modified lubricants,thereby displaying excellent lubricating and thermal or electrical conduction characteristics.The wear of con-tact tube increases with the increase of welding current.The wear of contact tube is worse in direct-current electrode positive(DCEP)than in direct-current electrode negative(DCEN).Arc ablation and electrical erosion are the dominant wear mechanisms of contact tube.

关 键 词：无镀铜实心焊丝 导电嘴磨损 纳米改性涂层 焊接工艺参数 

分 类 号：TG424[金属学及工艺—焊接]