Influence of cooling rate on microstructure evolution and pitting corrosion resistance in the simulated heat-affected zone of 2304 duplex stainless steels

被引：98
|
作者：
Chen, Lindou [1 ]
Tan, Hua [1 ]
Wang, Zhiyu [2 ]
Li, Jin [1 ]
Jiang, Yiming [1 ]
机构：
[1] Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
[2] Baosteel Co Ltd, Ctr Res & Dev, Shanghai 201900, Peoples R China
来源：
CORROSION SCIENCE | 2012年 / 58卷
基金：
美国国家科学基金会;
关键词：
Stainless steel; Potentiostatic; Thermal cycling; Pitting corrosion; Welding; SIGMA-PHASE PRECIPITATION; MECHANICAL-PROPERTIES; AUSTENITE REFORMATION; SECONDARY AUSTENITE; LOCALIZED CORROSION; TEMPERATURE; NITROGEN; BEHAVIOR; DEPENDENCE; TOUGHNESS;
D O I：
10.1016/j.corsci.2012.01.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pitting corrosion resistance of 2304 duplex stainless steel heat-affected zone with different cooling rates has been studied by potentiostatic critical pitting temperature (CPT) in 1.0 M NaCl. The results showed that, as cooling rate decreased from 100 to 10 degrees C/s in the temperature range of 1350-800 degrees C, the austenite fraction increased from 27.8% to 35.7%, and the CPT value increased from 14 to 19 degrees C. The morphologies after the CPT tests showed pitting occurred preferentially in the ferrite phase for all specimens. Moreover, relationship between pitting corrosion resistance and microstructure evolution was further discussed. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：168 / 174
页数：7
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