组织形貌对热轧双相钢力学行为影响.pdfVIP

Material Sciences 材料科学, 2013, 3, 179-185 doi:10.12677/ms.2013.34033 Published Online July 2013 (/journal/ms.html) Effects of Microstructures on Mechanical Behavior of Dual-Phases Steel Jia Guo, Zhiqiang Yao, Yu Du, Jie Liu, Fei Li, Guosen Zhu Shougang Research Institute of Technology, Beijing Email: guojia1017@ Received: Dec. 12th th th , 2012; revised: Dec. 15 , 2012; accepted: Jun. 10 , 2013 Copyright © 2013 Jia Guo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unre- stricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Abstract: The ingots were rolled by 550 mills in laboratory and the different shapes and distributions of ferrite and martensite were obtained by changing the cooling process. The influence of the shape and distribution of ferrite and martensite on mechanical properties of dual phase steel was investigated. The results indicated that, the size of marten- site is finer, and the distribution of martensite is more homogeneous in steel with the microstructure was mixed by po- lygonal ferrite, acicular ferrite and martensite than that of steel with the microstructure mixed by polygonal ferrite and martensite. Moreover, the values of yield strength, tensile strength and impact toughness increase apparently, the value of elongation decreases. Keywords: Ferrite/Martensite Dual Phase Steel; Tension Test Properties; Impact Property 组织形貌对热轧双相钢力学行为影响 郭 佳，姚志强，杜 宇，刘 杰，李 飞，朱国森 首钢技术研究院，北京 Email: guojia1017@ 收稿日期：2012 年 12 月 12 日