镍基合金大间隙搭接电子束填丝焊接头组织性能分析  

Microstructure and Properties of Electron Beam Welding Lap Joint of Ni Base Alloys with Large Gap

作　　者：陈悦 刘奋成[1] 谢美蓉[2] 朱瑞灿[2] 陈靖[2] 张益坤[2] 夏春[1] CHEN Yue;LIU Fen-cheng;XIE Mei-rong;ZHU Rui-can;CHEN Jing;ZHANG Yi-kun;XIA Chun(National Defence Key Discipline Laboratory of Light Alloy Processing Science and Technology,Nanchang Hangkong University,Nanchang 330063,China;Capital Aerospace Machinery Company,Beijing 100076,China)

机构地区：[1]南昌航空大学轻合金加工加工科学与技术国防重点学科实验室,南昌330063 [2]首都航天机械公司,北京100076

出　　处：《南昌航空大学学报（自然科学版）》2020年第2期7-14,共8页Journal of Nanchang Hangkong University(Natural Sciences)

基　　金：国家自然科学基金(51865036);江西省自然科学基金(20192ACBL21050)。

摘　　要：对GH4169合金与电铸镍板材搭接接头真空电子束焊接工艺进行了研究,并详细分析了配合间隙对接头组织和性能的影响。结果表明:双层板搭接间隙越大,间隙层填充金属越多,上板焊缝堆高越低,间隙层填充金属为异种合金混合凝固而成,填充金属存在剧烈对流作用,焊缝下板熔深形状和尺寸基本无变化。焊接接头硬度从上部、中部和下部依次减小。当焊接接头的配合间隙≤0.8 mm时,配合间隙越大,接头抗拉剪性能越低,当焊接接头的配合间隙> 0.8 mm时,配合间隙越大,接头抗拉剪性能越高。In this paper,vacuum electron beam welding process of lap joint of GH4169 alloy and electrodeposited nickel plates was carried out,and the effect of fit gap on the structure and properties of the joint was studied.The results show that the larger the lap gap is,the more the filler metal in the gap layer is,and the lower the weld stack height of the upper plate is.The filler metal in the gap layer is mixed and solidified by different alloys.The filler metal has strong convection effect,and the shape and size of the penetration of the lower plate of the weld basically have no change.The hardness of the welded joint decreased from the top,middle and bottom.When the fitting gap of the welded joint is less than or equal to 0.8 mm,the greater the fit gap,the lower the tensile shear resistance of the joint.On the contrary,the larger the fit gap,the higher the tensile shear performance of the joint.

关 键 词：镍基高温合金 真空电子束焊接 配合间隙 

分 类 号：U458[建筑科学—桥梁与隧道工程]