不锈钢带极埋弧堆焊防剥离工艺优化研究  

Research on optimization of anti⁃stripping process for strip submerged arc surfacing lay of stainless steel

作　　者：杨乘东 茹祥坤 唐伟宝 YANG Chengdong;RU Xiangkun;TANG Weibao(Shanghai Electric Nuclear Power Group Co.,Ltd.,Shanghai 201306,China;Shanghai Engineering Research Center of Nuclear Power Equipment Welding and Examination,Shanghai 201306,China)

机构地区：[1]上海电气核电集团有限公司,上海201306 [2]上海核电装备焊接及检测工程技术研究中心,上海201306

出　　处：《焊接技术》2023年第8期42-45,I0006,共5页Welding Technology

摘　　要：对不锈钢带极埋弧堆焊层进行热模拟试验,研究高温停留时间对堆焊层过渡区硬化层厚度的影响,用剪切试验检测不同硬化层厚度条件下的界面结合强度,用焊接数值模拟分析堆焊层数对界面残余应力的影响。研究结果表明:随着高温停留时间增加,堆焊层过渡区硬化层厚度增大,堆焊层与母材的结合强度降低。随着堆焊层数的增加,界面残余应力增大,堆焊层数达到6层残余应力为380 MPa。较小的热输入、较低的预热温度和层间温度、较少的堆焊层数,可以减小不锈钢带极埋弧堆焊过渡区硬化层厚度,提高堆焊层与母材结合强度,降低堆焊层界面残余应力,防止堆焊层剥离。The influence of high temperature residence time on the thickness of hardened layer in the transition zone of the stainless steel cladding was studied by thermal simulation test,and the interfacial bonding strength under different thicknesses of hardened layer was masured by shear test,meanwhile,welding numerical simulation has been used to analyse the interfacial residual stress.The results revealed that the thickness of hardened layer increased and the interfacial bonding strength decreased with the increasing of high temperature residence time.The residual stress improved with the number of the cladding layers increasing,the residual stress reached to 380 MPa when cladding was six layers.Lower welding heat input,lower preheating and interlayer temperature decreased the thickness of hardened layer in the transition zone and improved the interfacial bonding strength,fewer cladding layer induced the smaller residual stress and prevented the disbonding of stainless steel cladding by submerged arc with band⁃electrode.

关 键 词：不锈钢 带极埋弧堆焊 焊接数值模拟 硬化层 剥离 

分 类 号：TG455[金属学及工艺—焊接]