In order to solve the problems of melting depth and melting width reduction, and unstable welding process caused by severe scattering of electron beam in low vacuum and local vacuum electron beam welding. The variation of electron beam and weld morphology with the acceleration voltage of 100 kV, beam current of 60 mA and vacuum of 133.32~1 333.2 Pa was studied. A coaxial helium shielded welding process is proposed. During the welding of low carbon steel, the whole process is stable. The weld penetration is 30~40 mm, and the electron beam welding joint with large aspect ratio is obtained.
CHEN Jian
,
LENG Bing
,
ZHENG Hong
,
SU Jinhua
. Analysis of beam scattering and weld morphology in helium protected by ultra-low vacuum electron beam welding[J]. Transactions of The China Welding Institution, 2019
, 40(2)
: 68
-72
.
DOI: 10.12073/j.hjxb.2019400044
[1] Halbauer L, Zenker R, Weidner A, et al. Electron beam welding of cold rolled high-alloy trip/twip steel sheets[J]. Steel Research International, 2016, 87(4):436-444.
[2] Kar J, Dinda S K, Roy G G, et al. X-ray tomography study on porosity in electron beam welded dissimilar copper-304SS joints[J]. Vacuum, 2018, 149:200-206.
[3] Nogami S, Miyazaki J, Hasegawa A, et al. Study on electron beam weld joints between pure vanadium and SUS316L stainless steel[J]. Journal of Nuclear Materials, 2013, 442(1-3):S562-S566.
[4] 陈国庆, 张秉刚, 杨勇, 等. SiCp/2024与2219铝合金电子束焊接[J]. 焊接学报, 2015, 36(3):27-30 Chen Guoqing, Zhang Binggang, Yang Yong, et al. Electron beam welding of SiCp/2024 and 2219 aluminium alloy[J]. Transactions of the China Welding Institution, 2015, 36(3):27-30
[5] Venkata K A, Kumar S, Dey H C, et al. Study on the effect of eost weld heat treatment parameters on the relaxation of welding residual stresses in electron beam welded P91 steel plates[J]. Procedia Engineering, 2014, 86(86):223-233.
[6] 张毅梅, 王锴, 苏金花, 等. 超低真空度对电子束形状和焊接过程的影响[J]. 焊接, 2017(9):60-63 Zhang Yimei, Wang Kai, Su Jinhua, et al. Effect of ultra low vacuum degree on electron beam shape and welding process[J]. Welding & Joining, 2017(9):60-63
[7] 宁斐章, 赵惠哲. 束参数及真空度对电子束形状的影响[J]. 焊接学报, 1987, 8(3):10-18 Ning Feizhang, Zhao Huizhe. Influence of beam parameterss and vacuum chamber pressure upon the shape of electron beam[J]. Transactions of the China Welding Institution, 1987, 8(3):10-18
[8] 韦寿祺, 刘胜, 岳庆功, 等. 非真空电子束焊接关键技术[J]. 真空科学与技术学报, 2017, 37(9):933-938 Wei Shouqi, Liu Sheng, Yue Qinggong, et al. Latest development of non-vacuum electron beam welding technology and its industrial application[J]. Chinese Journal of Vacuum Science and Technology, 2017, 37(9):933-938
[9] 姚舜, 李铸国, 吴毅雄, 等. 角焊缝低真空填丝电子束焊接[J]. 焊接学报, 2000, 21(3):86-88 Yao Shun, Li Zhuguo, Wu Yixiong, et al. Low vacuum EBW with wire for fillet weld[J]. Transactions of the China Welding Institution, 2000, 21(3):86-88
