理化检验-物理分册2025，Vol.61Issue(5)：27-32,6.DOI:10.11973/lhjy-wl240072
SC700D钢的静态和动态CCT曲线
Static and dynamic CCT curves of SC700D steel
雷娜 1周志超 1杨艳龙 1邱宇 1杨业 1单显飞1
作者信息
- 1. 北京首钢股份有限公司,迁安 064400
- 折叠
摘要
Abstract
The continuous cooling transformation(CCT)tests of static and dynamic undercooled austenite and the influencing factors of SC700D high strength steel were carried out by means of thermal dilatometer.The expansion curves,hardness and microstructure of SC700D steel at different cooling rates were analyzed,and the corresponding CCT curves of static and dynamic undercooled austenite were obtained.The results show that compared with the static CCT test at the same cooling rate,the grain size of ferrite and bainite in SC700D steel decreased,the hardness increased,and the cooling temperature range of bainite became larger after dynamic CCT test.In the CCT curve,the ferrite and pearlite range,the ferrite and bainite range,and the bainite temperature range all move to the upper right,and the phase transition time was prolonged,indicating that the plastic deformation caused the material to undergo ferrite,pearlite and bainite phase transformation.关键词
高强钢/冷却速率/显微组织/维氏硬度/静态CCT/动态CCTKey words
high strength steel/cooling rate/microstructure/Vickers hardness/static CCT/dynamic CCT分类
金属材料引用本文复制引用
雷娜,周志超,杨艳龙,邱宇,杨业,单显飞..SC700D钢的静态和动态CCT曲线[J].理化检验-物理分册,2025,61(5):27-32,6.
