Microstructure and mechanical properties of X80 pipeline steels in different cooling schedules

被引：0

作者：

Min ZHOU Linxiu DU and Xianghua LIU State Key Laboratory of Rolling Technology and Automation Northeastern University Shenyang China ^{[110819
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机构：

来源：

ActaMetallurgicaSinica(EnglishLetters) | 2010年 / 23卷 / 03期

关键词：

Microstructure; Mechanical properties; Cooling schedule; Relaxation;

D O I：

暂无

中图分类号：

TG142.1 [钢的组织与性能];

学科分类号：

080502 ;

摘要：

The microstructures and mechanical properties of three X80 pipeline steel plates were investigated in this study.The plates were hot rolled by two stages, and cooled by three different cooling schedules to obtain different microstructures and mechanical properties.Transmission electron microscope(TEM) was used to observe the microstructure.The results indicated that the amount of polygonal ferrite(PF) and quasi-polygonal ferrite(QPF) decreased with decreasing of the finish cooling temperature(FCT), while the amount and size of M-A islands were larger.Relaxation promoted the Charpy V-notch(CVN) impact toughness at-20℃, but not the drop weight tear testing(DWTT) property at-15℃, and decreased the strength of the steel.

引用

页码：171 / 175

页数：5