电子束焊接工艺参数对平板焊接形貌的影响研究  

Influence of Electron Beam Welding Parameters on Welding Appearance of Plate

作　　者：张卫之 陈聪 陈虎[1] 程焰林[1] ZHANG Weizhi;CHEN Cong;CHEN Hu;CHENG Yanlin(Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621999,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621999

出　　处：《热加工工艺》2020年第5期29-31,40,共4页Hot Working Technology

基　　金：中物院电子工程研究所科技创新基金项目(426010401).

摘　　要：小束流电子束焊工艺被广泛应用于仪器仪表、真空器件、传感器等精密焊接领域。本文采用1 mm厚不锈钢薄板,分析了电子束堆焊焊缝的组织形貌,研究了不同电子束焊工艺参数对焊缝形貌的影响。试验表明,电子束堆焊焊缝晶粒明显细化,焊缝成分与母材基本一致,焊缝区域有断续状δ铁素体析出。随着束流的增大,熔深和熔宽呈线性增加;离焦量绝对值增大时,焊缝熔深明显减小,表面熔宽呈先增大后减小的趋势;电子束功率越大,焊缝的熔深与表面熔宽也越大;在相同的电子束功率下,加速电压越大,焊缝的熔深越大。Electron beam welding(EBW) with small current beam is widely used in precision welding of instruments,vacuum tubes and sensors. The appearance of weld seam of electron beam welding was studied using 1 mm thick stainless steel sheet. The influence of process parameters of electron beam welding on the weld morphology was also studied. The result shows that grains in electron beam weld seam are smaller. The chemical composition of weld seam is similar to that of base metal, and intermittent δ-ferrite precipitates in the weld seam. The depth and width of the weld seam is linear to beam current.The penetration depth decreases obviously and the weld width increases first and then decreases with the increase of absolute value of defocus distance. The lager the power of electron beam is, the bigger the penetration depth and surface width of weld seam are. In condition of same power of electron beam, the larger the accelerate voltage is, the deeper the penetration deep is.

关 键 词：精密电子束焊 组织形貌 工艺参数 

分 类 号：TG456.3[金属学及工艺—焊接]