Effect of Cooling Paths on Microstructure and Mechanical Properties of Vanadium Bearing Microalloyed Steel

摘要：

　　Based on ultra fast cooling,effects of cooling paths on microstructure and mechanical properties of vanadium bearing microalloyed steel were investigated by the observation of optical microscope and scanning electron microscope and the testing of mechanical properties,moreover,the work-hardening exponent was determined based on stress-strain curves.The results show that using ultra fast cooling can effectively refine ferrite grain size and the ferrite grain size is decreased as the final temperature of ultra fast cooling is decreased.In addition,the microstructure and mechanical properties can be controlled by cooling paths.The ferrite-perlite microstructure with lower strength and higher n-value of approx.0.2 and the ferrite-bainite microstructure with higher strength and lower n-value of approx.0.16 can be gained at the higher and lower final temperature of ultra fast cooling,respectively.And the yield ratio are all lower than 0.85.

关键词： V-bearing microalloyed steel Ultra fast cooling Cooling path Microstructure Mechanical properties

作者: Jun Chen Xiangwei Chen Shuai Tang Zhenyu Liu Guodong Wang

作者单位: The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 243-249

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）