全位置不锈钢内壁堆焊技术研究  

Study on surfacing technology of all-position stainless steel inner wall

作　　者：刘万存 袁亮文 赵佳 LIU Wangcun;YUAN Liangwen;ZHAO Jia(CFHI Dalian Nuclear Power and Petrochemical Equipment Co.,Ltd.,Dalian 116113,China)

机构地区：[1]一重集团大连核电石化有限公司,辽宁大连116113

出　　处：《压力容器》2022年第4期25-32,共8页Pressure Vessel Technology

摘　　要：针对某反应堆压力容器接管内壁全位置堆焊的技术难点,开发了全位置不锈钢堆焊技术。通过焊接试验,分析并讨论堆焊层的显微组织及力学性能。结果表明,堆焊层平整度较好,未观察到金相组织粗大晶粒,堆焊层PT,UT检测全部合格,堆焊层力学性能及硬度均符合相关要求,抗晶间腐蚀及点蚀能力好,符合技术条件要求。The all-position surfacing welding technology of stainless steel was developed in view of the technical difficulties of the all-position surfacing welding of the inner wall reactor pressure vessel.Through the welding test,the microstructure and mechanical properties of the surfacing layer were analyzed and discussed.The results show that the flatness of the surfacing layer is good,and no coarse grains are observed in the metallographic structure.PT and UT test of the surfacing layer are all qualified.Both the mechanical properties and hardness of the surfacing layer meet the relevant requirements,and the intergranular corrosion and pitting corrosion resistance are good,and meet the technical requirements.

关 键 词：全位置 堆焊 显微组织 力学性能 

分 类 号：TH49[机械工程—机械制造及自动化] TG455[金属学及工艺—焊接]