理化检验-物理分册2024，Vol.60Issue(4)：12-16,5.DOI:10.11973/lhjy-wl202404004
Q690D高强度钢的动态连续冷却转变曲线
Dynamic continuous cooling transformation curve of Q690D high strength steel
鹿超超 1孙雪娇 1方金林1
作者信息
- 1. 山东钢铁股份有限公司,济南 271104
- 折叠
摘要
Abstract
The thermal simulation test of Q690D high strength steel with different cooling rates was carried out on the thermal simulation testing machine,and the dynamic continuous cooling transformation curve was drawn.The microstructure of the steel was observed by microscope,and the Vickers hardness was tested by Vickers hardness tester.The results show that when the cooling rate was less than 0.1 ℃/s,the microstructure of Q690D high strength steel was basically pearlite,ferrite and a small amount of bainite.When the cooling rate was 0.5 ℃/s,the pearlite disappeared and the microstructure was all bainite.When the cooling rate was 3 ℃/s,martensite appeared in the microstructure.When the cooling rate increased to 8 ℃/s,the bainite almost disappeared,and the matrix structure was basically martensite.When the cooling rate was greater than 10 ℃/s,the microstructure was all martensite,and the critical transformation cooling rate of martensite was 10 ℃/s.关键词
Q690D高强度钢/连续冷却转变曲线/热模拟/显微组织Key words
Q690D high strength steel/continuous cooling transition curve/thermal simulation/microstructure分类
矿业与冶金引用本文复制引用
鹿超超,孙雪娇,方金林..Q690D高强度钢的动态连续冷却转变曲线[J].理化检验-物理分册,2024,60(4):12-16,5.
