X60/625镍基合金复合管环缝焊接工艺及应用  

Girth welding process and application of X60/625 nickel-based alloy clad pipe

作　　者：杨延华[1] Yang Yanhua(Xi’an Aeronautical University,Xi’an 710077,China)

机构地区：[1]西安航空学院,西安710077

出　　处：《焊接》2022年第1期48-54,共7页Welding & Joining

基　　金：陕西省教育厅科研计划项目(21JK0703)。

摘　　要：X60/625双金属复合管环缝焊接时,由于2种材料化学成分和物理性能差异太大,易引起镍基合金层氧化、稀释等问题,从而影响覆层耐腐蚀性和管道完整性。针对该问题,文中通过对X60/625双金属复合管焊接性的分析和焊接工艺的研究,制定出适用于X60/625双金属复合管环缝焊接工艺。经过焊缝无损检验、理化性能检验、耐腐蚀性能检验及稀释率检验,结果符合相关标准与规范。焊接工艺成功应用于沙特哈拉德项目管线及站场焊接施工一期管道项目中,焊接612道焊口的焊接一次合格率达99.7%。In girth welding of X60/625 bimetal clad pipe,because of the great differences of the chemical composition and physical properties of the two kinds of materials,it was prone to cause oxidation and dilution of nickel-based alloy layer,thus affecting the corrosion resistance of cladding layer and pipeline integrity.For the problem,the weldability and welding process of the X60/625 bimetal clad pipe were analyzed and studied in this article,so as to develop a girth welding process for X60/625 bimetal clad pipe.After nondestructive test,physical and chemical properties test,corrosion resistance test and dilution rate test of the weld,the results met the relevant standards and specifications.The welding process were successfully applied to first part clad pipeline of Saudi Arabia Halad Project,612 welded joints were finished and the weld pass rate was 99.7%.

关 键 词：镍基合金625 双金属复合管 焊接工艺 

分 类 号：TG442[金属学及工艺—焊接]