Effect of post-weld heat treatment on microstructure evolution and pitting corrosion resistance of electron beam-welded duplex stainless steel

被引：52
作者：
Zhang, Zhiqiang [1 ,2 ]
Jing, Hongyang [1 ,2 ]
Xu, Lianyong [1 ,2 ]
Han, Yongdian [1 ,2 ]
Zhao, Lei [1 ,2 ]
Lv, Xiaoqing [1 ,2 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, 135 Yaguan Rd, Tianjin 300350, Peoples R China
[2] Tianjin Key Lab Adv Joining Technol, Tianjin 300350, Peoples R China
来源：
CORROSION SCIENCE | 2018年 / 141卷
基金：
中国国家自然科学基金;
关键词：
Stainless steel; Potentiostatic; EPMA; TEM; Pitting corrosion; Welding; MECHANICAL-PROPERTIES; SECONDARY AUSTENITE; PHASE-TRANSFORMATION; CHROMIUM NITRIDE; BEHAVIOR; INPUT; INTERFACE; JOINTS; PRECIPITATION; WELDMENTS;
D O I：
10.1016/j.corsci.2018.06.030
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of electron beam welding and subsequent post-weld heat treatment at different temperatures on the microstructure evolution and pitting corrosion resistance of duplex stainless steel were investigated. The as welded joint exhibited poor pitting corrosion resistance, and pitting preferentially occurred at the ferrite grain in the weld. Heat treatment promoted austenite formation, Cr2N dissolution, and eliminated dendritic segregation, consequently improving the corrosion resistance of the welded joint. The optimal solution temperature range was 1050-1110 degrees C. The austenite in the weld was prone to selective corrosion after heat treatment owing to its lower pitting resistance equivalent number.
引用
收藏
页码：30 / 45
页数：16
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