“国和一号”主蒸汽安全阀支管扩管焊接工艺研究  

Research on Welding Process for Branch Pipe Expansion of“Guohe No.1” Main Steam Safety Valve

作　　者：常旭 王志峰 危永福 刘玉平 李鹏飞 白树华 徐晨洲 邹成超 CHANG Xu;WANG Zhifeng;WEI Yongfu;LIU Yuping;LI Pengfei;BAI Shuhua;XU Chenzhou;ZOU Chengchao

机构地区：[1]二重(德阳)重型装备有限公司,四川德阳618000

出　　处：《大型铸锻件》2024年第5期65-71,共7页Heavy Casting and Forging

摘　　要：“国和一号”主蒸汽安全阀支管扩管是创新性解决核电站运行噪声问题的关键设备。其材质为SA-182 Gr.F11 Cl.2,采用上部锻件和下部锻件组焊而成,整体结构为两端小、中间大的圆柱形容器,焊缝不具备背面清根条件。针对支管扩管的结构特点,设计了合理的单面焊双面成形坡口形式,结合焊缝质量控制要求和焊接效率选取了氩弧焊打底+手工焊填充的焊接方案进行焊接。针对材料的特点开发了相应的焊接规范参数,其性能满足设计要求。经过技术论证,先后解决了单面焊双面成形、焊接变形控制的难题,并且通过合理的工装设置实现了支管扩管的批量化工程应用。实施后,全部批次共计14件支管扩管无损检测全部一次合格,焊缝质量满足设计要求,制造质量稳定、周期可控,攻克了支管扩管这一设备的制造难题。The branch pipe expander of the“Guohe No.1”main steam safety valve is a key equipment for innovatively solving the noise problem during the operation of nuclear power plants.Its material is SA-182 Gr.F11 Cl.2,which is welded from the upper and lower forgings.The overall structure is a cylindrical container with small ends and large middle,but the weld does not have the condition for back gouging.This article focuses on the structural characteristics of branch pipe expander,and designs a reasonable single-sided welding double-sided forming groove form.In combination with the requirements of weld quality control and welding efficiency,a welding scheme of argon arc backing welding and manual welding filling is selected for welding.Corresponding welding specification parameters have been developed based on the characteristics of the materials,and their performance meets the design requirements.After technological verification,the difficulties of single-sided welding and double-sided forming,as well as welding deformation control,have been solved successively,and the batch engineering application of branch pipe expander has been achieved through reasonable tooling settings.After implementation,a total of 14 pieces of expanded branch pipes in all batches have been qualified after the non-destructive test in one time,and the weld quality met the design requirements.The manufacturing quality was stable and the cycle was controllable,indicating fully overcome the manufacturing difficulties of branch pipe expander.

关 键 词：主蒸汽安全阀支管扩管 单面焊双面成形 力学性能 

分 类 号：TG44[金属学及工艺—焊接]