聚焦状态对镁合金电子束焊缝成形特性的影响  

Effect of focusing state on forming characteristics of magnesium alloy electron beam weld

作　　者：王雅仙 马冰 石磊[1,2] 陆煜 赵健[1,2] 张迎迎 WANG Ya-xian;MA Bing;SHI lei;LU Yu;ZHAO Jian;ZHANG Ying-ying(The Fifty-second Research Institute of China Weapons Industry Group,Baotou 014030,Inner Mongolia Autonomous Region,China;Ningbo Branch of China Ordnance Academy,Ningbo 315103,Zhejiang pro.,China)

机构地区：[1]中国兵器工业集团第五二研究所,内蒙古包头014030 [2]中国兵器科学研究院宁波分院,浙江宁波315103

出　　处：《焊接技术》2020年第11期21-24,I0011,共5页Welding Technology

摘　　要：为了研究电子束焦点位置对焊缝熔深和深宽比的影响,文中基于"准静态焦点测量法"的理论,通过对10 mm厚的镁合金板材进行电子束焊,获得不同聚焦特性下的焊缝正、背面形貌。利用上坡焊和下坡焊方法对焊缝表面成形进行分析。研究结果表明:表面聚焦时电子束焊缝成形性最好,并且在局部焊透区间内焊接熔深最大、熔宽最小;通过Origin软件拟合出聚焦电流与焦点空间位置的关系式,通过焦点位置曲线图探明所测焦点的状态,当聚焦电流一定时,下坡焊方法测量得到的焦点位置靠前,焦距更大。In order to study the influence of electron beam focus position on weld penetration depth and depth-width ratio, this paper, based on the theory of ’quasi-static focus measurement method’, conducted electron beam welding on 10 mm thick magnesium alloy plate to obtain the positive and negative morphologies of weld seam under different focusing characteristics. The method of up-slope welding and down-slope welding was used to analyze the weld surface forming, the relation between the focusing current and the spatial position of the focus was fitted, and the state of the measured focus was proved by the curve of the focus position. The research results showed that the electron beam weld had the best formability when the surface was focused, and had the largest welding penetration and the smallest welding width in the local penetration interval. The relationship between the focusing current and the focus space position was fitted by Origin software, and the state of the measured focus was verified by the focus position curve. When the focus current was constant, the focus position measured by the down-slope welding method was more forward and the focal length was larger than that under the up-slope welding conditions.

关 键 词：镁合金 真空电子束焊接 聚焦状态 焦点位置 准静态焦点测量法 

分 类 号：TG456.3[金属学及工艺—焊接] TG457