GH4169-电铸镍异种金属搭接接头电子束焊接工艺研究  

Study on Electron Beam Welding of GH4169-electroformed Nickel Dissimilar Metals Overlap Joints

作　　者：刘敏 张丽娜 马丽翠 王彦超 曹辉辉 Liu Min;Zhang Lina;Li Yue;Wang Yanchao;Cao Huihui(Capital Aerospace Machinery Co.,Ltd.,Beijing 100076)

机构地区：[1]首都航天机械有限公司,北京100076

出　　处：《航天制造技术》2020年第4期33-37,共5页Aerospace Manufacturing Technology

摘　　要：结合型号产品焊接要求开展了限定下层进入熔深的GH4169与电铸镍搭接电子束焊接工艺试验,进行了接头显微组织分析及断口检测分析。研究结果表明:搭接间隙对焊缝横截面形貌及下层进入熔深有直接影响,当装配间隙大于0.7mm时,无法形成连续搭接焊缝;增加焊接热输入可增大下层进入熔深,束斑扫描功能有效增加了焊缝宽度及搭接面焊缝熔宽;GH4169与电铸镍搭接接头断口呈现韧窝形貌,为韧性断裂。According to the welding requirements of the model products,the electron beam welding technology test of GH4169-electroformed nickel dissimilar metals overlap joints which limit the lower penetration was carried out.The microstructure and fracture detection of the joints were analyzed.The results showed that the lap had a direct influence on the cross-section morphology of the weld and the lower layer penetration.When the assembly gap is larger than 0.7mm,continuous lap welds cannot be formed.The welding heat input can increase the lower layer penetration.Beam spot scanning function effectively increased the weld width and lap weld width.The fracture of GH4169 and electroformed nickel lap joints showed dimple morphology and ductile fracture.

关 键 词：搭接接头 GH4169 电铸镍 下层进入熔深 

分 类 号：TG456.3[金属学及工艺—焊接]