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

作     者：Min ZHOU Linxiu DU Xianghua LIU 

作者机构：State Key Laboratory of Rolling Technology and Automation Northeastern University Shenyang 110819 China 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2010年第23卷第3期

页      面：171-175页

核心收录：

学科分类：0905[农学-畜牧学] 08[工学] 09[农学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by a Key Projects in the National Science & Technology Pillar Program during the Eleventh Five-Year Plan Period (No.2006BAE03A08) 

主　　题：Microstructure Mechanical properties Cooling schedule Relaxation 

摘      要：The microstructures and mechanical properties of three X80 pipeline steel plates were investigated in this *** plates were hot rolled by two stages, and cooled by three different cooling schedules to obtain different microstructures and mechanical *** electron microscope（TEM） was used to observe 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 *** 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.