摘要
选用镍基高温合金GH4169进行试验,分析了不同种类活性剂对焊缝成形的影响规律,发现添加不同的氧化物对焊缝表面成形、熔深均有影响,而添加氟化物却影响不大.在此基础上,进行配比和优化,得到了能改善焊缝成形,提高表面质量的电子束焊活性焊剂.分析活性剂改善电子束焊接焊缝成形的原因,认为添加活性剂改变了熔池内部的表面张力梯度,从而影响了熔池的流动方式,形成了窄而深、表面成形较好的焊缝.结果表明,活性剂电子束焊接能改善焊缝表面成形,并可进一步消除咬边等表面缺陷,这对薄板的电子束焊接技术很有帮助.
In this paper,the effects of different kinds of activating fluxes on appearance of weld was analysed during the electron beam welding(EBW)of nickel-base super alloy GH4169,oxides had deep influence on welding depth and weld formation of both sides of plate,while fluoride had no influence.And on base of it,activating fluxes which can greatly improve weld shape and surface quality of EBW are obtained by combination and optimization.The reason of improving appearane of weld is that,with activating fluxes change surface tension gradient in the weld pool,then affect the pattern of the fluid flow,consequently form narrow and deep,well shape weld.The results show that activating electron beam welding can improve appearane of weld and eliminate some surface defects such as undercutting,which is very useful during thin plate EBW.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2009年第2期83-86,共4页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(50505019)
高能束流重点实验室基金资助项目(2006113)
关键词
活性剂电子柬焊接
表面成形
表面张力梯度
熔池流动方式
activating electron beam welding
appearance of weld
surface tension gradient
weld pool flow pattern
