作　　者： (郭祥）; (芦丽莉）; (王飞）; (叶义海）;

机构地区： 中国核动力研究设计院反应堆燃料及材料重点实验室,四川成都610041

出　　处： 《焊接》 2017年第8期38-42,共5页

摘　　要： 核级不锈钢与镍基合金异种金属环接头在焊接过程中发生裂纹是主要缺陷。从合金元素、打底焊工艺、焊接热输入、约束状态等方面对异种金属环接头焊接裂纹开展成因分析与控制,通过接头射线检验、金相检验、残余应力分析等手段对接头开展性能评价,有效消除了不锈钢与镍基合金异种金属环接头焊接裂纹,降低了焊接接头的残余应力水平。该研究结果对不锈钢与镍基合金异种金属环接头焊接裂纹的控制具有重要的参考意义和实用价值。 Crack is the main defect of dissimilar metals circumferential weld in nuclear industry.The crack of dissimilar metals circumferential weld had been analyzed and controlled from chemical composition,backing welding technology,welding heat input and constrained state.Weld performances were valuated by X-ray examination,metallographic examination,and residual stress analysis.The circumferential weld crack had been eliminated and the residual stress had been decreased.The results has good reference for the control of dissimilar metals circumferential weld crack.

关 键 词： 异种金属 环接头 裂纹 残余应力