摘要
为了研究热处理工艺对HFW焊管沟槽腐蚀的影响,采用恒电位阳极极化法测定了20钢HFW焊管在不同热处理工艺条件下的沟槽腐蚀敏感系数,并进行了显微组织分析。结果表明,HFW焊管焊缝与热影响区、母材的电位差是引起沟槽腐蚀的主要原因;通过有效的热处理可以使焊缝、热影响区及母材的组织均匀、晶粒细化,能显著降低沟槽腐蚀敏感系数;不同热处理状态下抗沟槽腐蚀敏感性能为调质热处理>(中频感应、电阻炉)加热+水冷>焊态。
In order to study the effect of different heat treatment technology on grooving corrosion of HFW pipe, the grooving corrosion sensitivity coefficient of 20 steel HFW pipe was measured by adopting constant potentials anodic polarization approach, and carried out microstructure analysis. The results showed that the potential difference in HFW pipe weld, HAZ and base metal is the primary reason for grooving corrosion; the effective heat treatment can make structure well-distributed for weld, HAZ and base metal and grain refinement, and can remarkably reduce grooving corrosion sensitivity coefficient; the grooving corrosion sensitivity resistance under different heat treatment state is quenched-tempered heat treatment 〉（intermediate frequency, electric resistance furnace） heating＋water cooling〉as welded.
出处
《焊管》
2016年第6期18-21,共4页
Welded Pipe and Tube
关键词
HFW焊管
热处理
沟槽腐蚀
HFW pipe
heat treatment
grooving corrosion
