小径铜镍弯头焊接纵向裂纹的原因分析和预防措施  

Cause analysis and preventive measures for longitudinal cracks in welding of small diameter copper-nickel elbows

作　　者：何瑞 HE Rui(CNOOC(China)Co.,Ltd.Shenzhen Branch,Shenzhen 518054,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518054

出　　处：《全面腐蚀控制》2024年第5期40-42,共3页Total Corrosion Control

摘　　要：海洋石油平台陆地建造过程中,经焊接加工的某批小径铜镍合金管(UNS C70600)在弯头管件侧发生严重开裂,为了研究铜镍管线焊后开裂的原因,本文通过材料、结构及断口特征分析,发现对于小径铜镍合金管弯头管件,通过控制焊接热输入量,避免过热焊接,可有效降低焊接裂纹的发生。During the construction process of offshore oil platforms on land,a batch of small-diameter copper-nickel alloy pipes(UNS C70600)that were welded and processed suffered severe cracking on the elbow pipe fitting side.In order to study the reasons for the cracking of copper-nickel pipelines after welding,this article uses materials,structures and fracture characteristics analysis,it was found that for small-diameter copper-nickel alloy pipe elbow fittings,by controlling the welding heat input and avoiding overheated welding,the occurrence of welding cracks can be effectively reduced.

关 键 词：UNS C70600 小径弯头管件 焊接纵向裂纹 热输入量 

分 类 号：TG47[金属学及工艺—焊接]