|关键词: 反应堆压力容器 CRDM Inconel 690 窄间隙
|Welding process research on butt welds between CRDM socket flange and penetration assemblies for RPV
Zhang Yan, Guo Xiao, Fei Dakui, Jin Tong, Cao Yong
|For the problems including difficulty in ensuring good protection，high operation complexity and low efficiency during narrow gap welding between CRDM socket flange and penetration assemblies with conventional TIG gun, a modified TIG gun for narrow gap welding between CRDM socket flange and penetration assemblies was developed and related process was tested by experimental welding. Results showed that the modified gun can not only ensure excellent protection during the whole welding process, but also improve efficiency and save cost. Weld chemical composition, joint mechanical properties, joint integrity, intergranular corrosion testing results all meet the technical requirements for product manufacturing.
|Key words: RPV CRDM Inconel 690 narrow gap