分离器筒体镍基C276带极埋弧堆焊工艺研究及应用  

Study and application of nickel-base C276 SAW strip surfacing technology for separator cylinder

作　　者：刘鸿彦 孙修圣 杜永勤 李卫华 LIU Hongyan;SUN Xiusheng;DU Yongqin;LI Weihua(Nanjing Baose Co.,Ltd.,Technical Center,Nanjing211178,China)

机构地区：[1]南京宝色股份公司技术中心,南京211178

出　　处：《压力容器》2022年第11期22-28,共7页Pressure Vessel Technology

摘　　要：采用带极埋弧堆焊对SA302 Gr.B试板进行镍基合金C276堆焊工艺评定,依照NB/T 47014及技术协议要求对堆焊层的弯曲、硬度、化学成分及耐蚀性能指标进行了检测,试验结果表明,选用型号为EQNiCrMo-3/NSAS3-50BS的焊带/焊剂组合进行过渡层堆焊,EQNiCrMo-4/ES A-FB 2B的焊带/焊剂组合进行耐蚀层堆焊,可以获得性能优良的堆焊层,焊道成型平整。按照ASTM G28 A法对耐蚀层焊态试样与固溶态试样进行腐蚀率检测,结果分别为9.76,7.55 mm/a,满足技术协议对腐蚀率比值≤1.5及JB/T 4756对腐蚀率≤12 mm/a的要求。根据焊接工艺评定制定焊接工艺规程,对分离器筒体内壁进行EQNiCrMo-3+EQNiCrMo-4带极堆焊,采用纵向压道方式进行,通过工装约束、分区对称施焊以及预热、热处理等工艺措施,筒体堆焊变形得以控制,产品的堆焊质量得以保证。The nickel-base alloy C276 surfacing process of SA302 Gr.B test plate was evaluated by submerged arc electrode surfacing machine.The bending, hardness, chemical composition and corrosion resistance of surfacing layer were tested according to NB/T 47014 and technical agreement requirements.The test results show that the surfacing layer has excellent performance and the weld beads were formed smoothly when EQNiCrMo-3/NSAS3-50BS and EQNiCrMo-4/ES A-FB 2B were selected for the transition layer surfacing and the corrosion resistant layer surfacing.The corrosion rate of as-welded and as-solutioned specimens of corrosion resistant layer were detected according to ASTM G28 A.The results were 9.76 mm/a and 7.55 mm/a respectively, which meet the requirements of technical agreement for corrosion rate ratio ≤1.5 and JB/T 4756 for corrosion rate ≤12 mm/a.The welding procedure was formulated to guide the strip surfacing of inner wall of separator cylinder according to the surface procedure qualification.The EQNiCrMo-3+EQNiCrMo-4 surfacing were performed in a longitudinal way.Surfacing deformation of the separator cylinder was controlled and product surfacing quality was guaranteed by technological measures such as tooling constraint, zone symmetric welding, preheating and heat treatment.

关 键 词：分离器 筒体内壁 镍基合金 纵向堆焊 带极埋弧堆焊 

分 类 号：TH49[机械工程—机械制造及自动化] TG455[金属学及工艺—焊接]