摘要
针对电站辅机中的12Cr2Mo1VR/20MnMoNb异种钢接头,通过研究接头特征、材料(包括焊材)的高温许用应力、热处理温度、化学成分、室温力学性能等,设计出采用铁素体堆焊层进行过渡的方式,解决了该异种钢接头直接对接后不能热处理的问题。同时,通过试验分析,总结出12Cr2Mo1VR/20MnMoNb异种钢焊缝的焊接和热处理工艺:先在12Cr2Mo1VR坡口面堆焊F62P0-EB2R-B2R过渡层,对堆焊层进行(690±10)℃热处理;之后堆焊层再与20MnMoNb相焊接,焊缝采用F69P0-H10Mn2NiMoA焊材,焊接后采用660±10℃热处理,或对接焊缝两侧分别控温热处理:堆焊层侧采用(660±10)℃(或(665±15)℃),管板侧采用(620±10)℃(或(620±15)℃)热处理。
For the 12Cr2Mo1VR/20MnMoNb dissimilar steel joints in the auxiliary equipment of the power station,the transition method of the ferrite surfacing layer was designed by studying the joint characteristics,high temperature allowable stress of the materials(including welding materials),heat treatment temperature,chemical composition and mechanical properties at room temperature,so to solve the problem that the directly connected dissimilar steel joints could not be heat treated.The welding and heat treatment processes of 12Cr2Mo1VR/20MnMoNb dissimilar steel weld are proposed as follows based on experimental analysis:First,the F62P0-EB2R-B2R transition layer is surfacing on the 12Cr2Mo1VR groove surface,and the surfacing layer is heat-treated at(690±10)℃,then the surfacing layer and the 20MnMoNb steel are butted with F69P0-H10Mn2NiMoA welding material and treated at(660±10)℃.Or both sides of the butt weld are treated at different temperatures:the surfacing layer side is treated at(660±10)℃(or(665±15)℃)and the tube sheet side is treated at(620±10)℃(or(620±15)℃).
作者
银润邦
林宝森
莫其鹏
李志炜
郑周
谭宏
陈建彬
王炯铭
Yin Runbang;Lin Baosen;Mo Qipeng;Li Zhiwei;Zheng Zhou;Tan Hong;Chen Jianbin;Wang Jiongming(Dongfang Boiler Co.,Ltd.,Dongfang Electric Group,Deyang Sichuan 618000,China;Guoneng(Quanzhou)Thermal Power Co.,Ltd.,Quanzhou Fujian 362804,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2021年第10期155-162,共8页
Heat Treatment of Metals
