The researches of vacuum electron beam self - material brazing specimen find that element interdiffusions are strongly occurred in interface and some new phases are precipitated during welding . the interdiffusion process is likely approached to nb atoms diffusing into stainless steel side according to the analysis of the morphology and eds of the interdiffused layer Tem分析发现， 1300退火形中国原子能科学研究院硕士学位论文成的扩散层中有大量的针状析出相产生，经sadp测定为乙一( nb ， ni )相，而基体相为( ni ， cr ， nb ， c ) fe一。
