大口径Cu/Al合金薄壁管的感应加热焊接工艺探究  

Research on induction heating welding process of large diameter Cu/Al alloy thin wall tube

作　　者：曹蒙云 程诗铎 黄天 刘新宽[1] 马凤仓[1] 刘平[1] 王子延 薛思雨 曹凯 CAO Mengyun;CHENG Shiduo;HUANG Tian;LIU Xinkuan;MA Fengcang;LIU Ping;WANG Ziyan;XUE Siyu;CAO Kai(School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Kuntong Bozhi Intelligent Technology(Shanghai)Co.Ltd.,Shanghai 201207,China)

机构地区：[1]上海理工大学材料科学与工程学院,上海200093 [2]坤同勃志智能科技(上海)有限公司,上海201207

出　　处：《功能材料》2019年第11期11007-11013,共7页Journal of Functional Materials

基　　金：国家杰出青年科学基金资助项目(51771119)

摘　　要：运用感应加热方法,研究了一种操作性强工艺简便的大口径薄壁合金铝连接铜管的焊接方法,研究了焊接电流、焊缝长度、焊接高温保温时间对大口径薄壁铜铝合金管的影响,采用ZWICK-2050电子万能材料试验机测试界面结合强度,用扫描电子显微镜(SEM)和偏光显微镜(PM)观察界面形貌,EDX和X射线衍射仪(XRD)进行物相分析。通过感应加热可以实现铜铝薄壁管的焊接,当加热时间6 s时,焊缝长度为15 mm时,铜铝焊接管的质量最佳,焊接结合强度最高。铜铝中间化合物层只有Al2Cu和AlCu两种,没有发现Al4Cu9类型的化合物。Using induction heating method, in this paper, a kind of operational and uncomplicated process was explored, by which large diameter thin-walled aluminum alloy and copper pipe could be welded. The effect of welding current, welding-length and welding high temperature insulation time on large diameter thin-walled copper aluminum tubes was studied. The microstructures of the interface were observed by scanning electron microscope(SEM) and polarizing microscope(PM), and the interfacial reaction products were analyzed by X-ray diffraction(XRD) and energy dispersive X-ray spectroscopy(EDX). When the heating time was 6 s and weld length was 15 mm, the quality of copper aluminum welded pipe was the best, and the tensile strength was highest. The copper-aluminum intermediate compounds layer were only Al2Cu and AlCu, and no Al4Cu9-type compounds had been found.

关 键 词：薄壁铜管 铝合金管 结合强度 中间化合物 金属间化合物 

分 类 号：TG442[金属学及工艺—焊接]