Effect of Heat Treatment on Hydrogen Diffusion Behavior of Process Pipe Steel

被引：0

作者：

Han, Do Kyeong ^{[1
]}

Jung, Hwan Gyo ^{[2
]}

Kim, Kyoo Young ^{[1
]}

Kim, Sung Jin ^{[2
]}

机构：

[1] Pohang Univ Sci & Technol, Grad Inst Ferrous Technol, Pohang, South Korea

[2] POSCO Tech Res Labs, Pohang, South Korea

来源：

INTERNATIONAL JOURNAL OF OFFSHORE AND POLAR ENGINEERING | 2015年 / 25卷 / 01期

关键词：

Process pipe steel; sour environment; PWHT; acicular ferrite; Fe3C precipitate; hydrogen permeation; HIC; SULFIDE STRESS CRACKING; METALLURGICAL FACTORS; MICROSTRUCTURE; PERMEATION; PERMEABILITY;

D O I：

暂无

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

The influence of heat treatment on the HIC susceptibility in process pipe steel was investigated with respect to the hydrogen diffusion behavior by employing the electrochemical permeation technique. This study clearly shows that, contrary to other microstructures, in acicular ferrite, iron carbide (Fe3C) particles are newly precipitated mostly along the grain boundaries by the simulated PWHT conducted at 620 degrees C for one hour. In addition, a decrease in hydrogen diffusivity attributed to the hydrogen trapping effect by the Fe3C leads to an increase in apparent solubility. As a result, heat-treated process pipe steel is more susceptible to HIC.

引用

页码：56 / 62

页数：7

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