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为了使燃料棒焊接接头具有良好的性能 ,进行了大量工艺试验。试验表明 ,适当降低焊接时的能量输入 ,并使聚焦、散焦合理搭配 ,从而减少电子束焊接环缝时合金元素的蒸发 ,这种真空电子束焊接工艺适合国产低锡Zr -4合金。用该工艺焊接了一万多支国产低锡Zr -4包壳核燃料棒
In order to make the fuel rod welded joints have good performance, a large number of process tests. Experiments show that the vacuum electron beam welding process is suitable for the domestic low-tin-Zr-4 alloy by properly reducing the energy input during welding and making the focusing and defocusing reasonable collocation, so as to reduce the evaporation of alloying elements during electron beam welding. With the process of welding more than 10,000 domestic production of low tin Zr -4 cladding nuclear fuel rods