Effects of cooling processes on microstructure and susceptibility of hydrogen-induced cracking of X80 pipeline steel

被引：0
作者：
Li, Longfei [1 ]
Song, Bo [1 ]
Cheng, Jin [1 ]
Yang, Yuhou [1 ]
Liu, Zhen [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Met & Ecol Engn Beijing, 30 Xueyuan Rd, Beijing 100083, Peoples R China
来源：
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION | 2018年 / 69卷 / 05期
基金：
中国国家自然科学基金;
关键词：
cooling process; HIC resistance; hydrogen permeation; microstructure; X80 pipeline steel; STRESS-CORROSION CRACKING; CRYSTALLOGRAPHIC TEXTURE; MECHANICAL-PROPERTIES; METALLURGICAL FACTORS; TRAPPING EFFICIENCY; STAINLESS-STEELS; GRAIN-BOUNDARY; HSLA STEELS; PERMEATION; RESISTANCE;
D O I：
10.1002/maco.201709843
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The effects of three different kinds of cooling processes on the properties of the microstructure for hydrogen-induced cracking (HIC) resistance and hydrogen atom diffusion on X80 pipeline steel have been investigated in the laboratory. The results show that Steel F after furnace cooling contains coarse polygonal ferrite (PF), quasi-polygonal ferrite (QF), and a small amount of granular bainite (GB). Steel A after air cooling contains finer QF and GB. Steel W after water cooling quenching treatment contains a large amount of GB, lath bainite (LB), and a small amount of martensite (M) and ferrite. In addition, the results of hydrogen permeation test show that hydrogen atoms diffuse the fastest in Steel W with a finer microstructure and grains, and the content of dissolved hydrogen atoms is lowest in Steel F. After soaking corrosion tests, Steel A has the best HIC resistance properties, due to the role of more high-angle grain boundaries (HABs) and fewer grain boundaries with the <100> orientation.
引用
收藏
页码：590 / 600
页数：11
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