12Cr2Mo1锻件带极埋弧堆焊Inconel625工艺研究  

Research on the Process of 12Cr2Mo1 Forging Strip Submerged Arc Surfacing Inconel625

作　　者：湛立宁 陈敏 卢俊文 周璐璐 吴婷 王肖逸 Zhan Lining;Chen Min;Lu Junwen;Zhou Lulu;Wu Ting;Wang Xiaoyi(Hebei Special Equipment Supervision and Inspection Institute,Shijiazhuang,Hebei 050061,China;Hebei Pressure Equipment Testing and Evaluation Technology Innovation Center,Shijiazhuang,Hebei 050061,China)

机构地区：[1]河北省特种设备监督检验研究院,河北石家庄050061 [2]河北省承压设备检测评价技术创新中心,河北石家庄050061

出　　处：《化工设备与管道》2024年第1期24-30,共7页Process Equipment & Piping

摘　　要：为保证12Cr2Mo1锻件带极埋弧堆焊Inconel625质量达到设计文件要求,对锻件基材和Inconel625焊接性能进行了分析,模拟承制产品实际生产状态进行堆焊工艺评定试验,采用周向堆焊和直道堆焊相结合的方法制备评定试件,对堆焊层化学成分、弯曲性能、硬度指标、金相组织、耐腐蚀性能进行了检测。试验结果表明,采用EQ62-50/ES200的焊带/焊剂组合可以获得性能优良的堆焊层。对堆焊层进行腐蚀速率检测,其焊态试样腐蚀速率为1.50 mm/a,固溶态试样腐蚀速率为1.17mm/a,两者之比为1.28,满足JB/T 4756—2006标准规定比值小于或等于1.5的要求。根据评定合格的焊接工艺对热高分气/循环氢换热器管板进行了堆焊,堆焊产品已稳定运行三年,未出现焊接缺陷和腐蚀缺陷。In order to ensure that the quality of 12Cr2Mo1 forging strip electrode submerged arc surfacing Inconel625 meets the requirements of the design documents,the forging substrate and Inconel625 welding performance were analyzed,and the actual production status of the bearing product was simulated for surfacing process evaluation tests.Evaluation specimens were prepared using a combination of circumferential surfacing and straight surfacing,and the chemical composition,bending performance,hardness index,metallographic structure,and corrosion resistance of the surfacing layer were tested.The experimental results indicate that the use of EQ62-50/ES200 welding strip/flux combination can achieve excellent performance of the surfacing layer.Conduct corrosion rate detection on the overlay layer,and the corrosion rate of the welded sample is 1.50 mm/a,and the corrosion rate of the solid solution sample is 1.17 mm/a,with a ratio of 1.28,meeting the requirement of JB/T 4756—2006 standard that the ratio is less than or equal to 1.5.According to the qualified welding process,the tube plates of the hot high separation gas/circulating hydrogen heat exchanger were overlaid.The overlaid welding product has been in stable operation for three years,and there are no welding defects or corrosion defects.

关 键 词：12Cr2Mo1 Inconel625 换热器管板 带级埋弧堆焊 腐蚀试验 

分 类 号：TG445[金属学及工艺—焊接]