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ITER屏蔽包层模块是一种多冷却通道的316LN不锈钢部件,部件制作的关键技术包括冷却通道上前端盖板的小熔深焊接。本文针对10mm、5mm两种不同熔深要求的316LN屏蔽包层模块小熔深焊接技术难题,开展了电子束焊接结构设计和相应的焊接工艺研究。确定了屏蔽包层模块的锁底对接结构,同时确定了不同熔深下锁底对接的衬底宽度。实验结果证明,该工艺方法满足技术条件要求,确保了焊缝达到稳定可靠的焊接质量。同时通过该工艺研究取得了大量性能试验数据,为ITER屏蔽包层模块的设计提供了技术输入。
The ITER Shield Cladding Module is a 316LN stainless steel component with multiple cooling channels. Key techniques for component fabrication include small penetration welding of the front cover on the cooling channels. In order to solve the technical problem of small penetration welding of 316LN shield cladding module with 10 mm and 5 mm penetration depths, the structure design of the electron beam welding and the corresponding welding technology are studied in this paper. The lock-in-butt-jointing structure of the shielding cladding module is determined, and the width of the substrate abutting against the lock-in bottom at different penetration depths is determined. Experimental results show that the process to meet the technical requirements, to ensure that the weld to achieve stable and reliable welding quality. At the same time, a great deal of performance test data have been obtained through the research of this technology, which provides technical input for the design of ITER shielding cladding module.