VVER-1000堆型主管道焊缝冲击性能影响因素研究  

Research on the Influence Factors of Weld Impact Properties for VVER-1000 Main Coolant Piping

作　　者：郑倩倩 宋纪煜 郑日水 孙彬彬 罗超 于立学 吴庆 姜立伟 李小科 ZHENG Qianqian;SONG Jiyu;ZHENG Rishui;SUN Binbin;LUO Chao;YU Lixue;WU Qing;JIANG Liwei;LI Xiaoke(Jiangsu Nuclear Power Corporation,Lianyungang 222040,China;Xiapu Nuclear Power Corporation,Xiapu 355100,China;Shandong Nuclear Power Equipment Manufacturing Co.,Ltd.,Yantai 265100,China;Shanghai Institute of Special Equipment Inspection and Technical Research,Shanghai 200062,China)

机构地区：[1]江苏核电有限公司,江苏连云港222040 [2]霞浦核电有限公司,福建霞浦355100 [3]山东核电设备有限公司,山东烟台265100 [4]上海市特种设备监督检验技术研究院,上海200062

出　　处：《电焊机》2022年第10期80-87,106,共9页Electric Welding Machine

摘　　要：结合大直径厚壁珠光体管道出现在5G1T位置冲击值偏低问题,针对珠光体耐热钢水平固定位置的焊接参数、试验值、焊接材料、线能量等影响因素进行了研究,经过分析及论证,最终得出:焊接热输入过大是主因,焊条Si元素含量偏高是次因,并针对这些因素提出了改进措施。通过工艺评定试验及验证,顺利完成了焊接工艺评定任务,在某核电站3、4号机组主管道焊接中实际应用,收到良好效果。There is no anti-slip brackets in the construction design of the VVER-1000 main coolant piping. Taking into account the nuclear safety of LBB, according to the requirements of NNSA, the nuclear safety level of the main pipeline has been increased from the originally designed Class B equipment to the Class A equipment management.Based on the regulations and the welding procedure qualification(WPQ) instruction(ППА) which were provided by Russian, an additional impact toughness requirement was added in the inspection items. The primary WPQ was failed because of part of impact values was too low in WPQ with 5G1T welding position.The article is focus on welding parameters,test values, welding materials, heat input etc. influence factors in WPQ with horizontal fixed position of pearlite heat-resistant steel, enhance of research through theory aspect.The relevant influencing factors were analyzed and demonstrated, and finally passed the process qualification test and verification, and the welding process qualification task was successfully completed. The actual application in the main coolant piping of the 3 and 4 units of a nuclear power plant has achieved good results. It has reference and promotion value for subsequent welding of the main coolant piping of similar type of nuclear power units and other similar pearlite piping with grand diameter and wall thickness.

关 键 词：主管道 工艺评定 珠光体耐热钢 焊接线能量 冲击韧性 

分 类 号：TG407[金属学及工艺—焊接]