摘要
钴基合金因其良好的耐高温性、耐腐蚀性和耐磨性,成为目前应用最为广泛的一种堆焊合金。为降低核电厂运行机组的维修成本,使设备利用率最大化,本着"以修代换"维修方式开展了阀门阀芯ASTM 216 WCB钢钴基耐磨堆焊工艺研究。文中主要简述了堆焊类型和钴基合金耐磨性的机理;详细阐述了ASTM 216 WCB钢钴基合金耐磨堆焊工艺评定,通过对堆焊层无损检测、理化检测,获得了满意的堆焊接头,为制定机组大修实施同材质阀门阀芯钴基耐磨堆焊工艺指导书提供了有力的技术依据,从而保障阀门阀芯维修钴基耐磨堆焊质量符合要求。
Cobalt base alloy is the most widely used hardfacing alloy because of its good high temperature resistance,corrosion resistance and wear resistance.In order to reduce the maintenance cost of operating units in nuclear power plant and improve the maximum utilization rate of equipment,the research on cobalt based hardfacing technology of valve element ASTM 216 WCB steel was carried out in the way of"replacement replaced by repair".In this paper,the types of hardfacing and the mechanism of wear resistance of cobalt base alloy are introduced,and the cobalt base alloy hardfacing procedure qualification of ASTM 216 WCB steel is described in detail.Through the non-destructive testing and physical and chemical testing of the hardfacing layer,a satisfactory hardfacing joint is obtained,which provides a strong technical basis for the establishment of the process instruction of the same material valve core cobalt base hardfacing for the overhaul of the unit,so as to ensure the quality of the valve core repair cobalt base hardfacing meets the requirements.
作者
徐宝坪
晋嘉昱
朱家泽
XU Baoping;JIN Jiayu;ZHU Jiaze(Fujian Fuqing Nuclear Power Co.,Ltd.,Fuqing 350318,China)
出处
《电焊机》
2020年第10期74-77,I0006,I0007,共6页
Electric Welding Machine
关键词
钴基合金
耐磨
堆焊
cobalt base alloy
wear resistance
hardfacing
