摘要
在Gleeble-1500热模拟机上测定3Cr2Mo钢以不同冷却速度连续冷却时的膨胀曲线,结合金相-硬度法、示差热分析法（DSC）获得该钢的连续冷却转变曲线（CCT曲线）。根据测得的CCT曲线,分析以不同冷却速度连续冷却时的组织转变;阐明冷却速度与组织的演变以及硬度变化的关系。比较分析所测CCT曲线与同类转变曲线的异同。研究结果表明：马氏体转变的临界冷却速度为1.0~1.5℃/S;为生产实践和新工艺的制定提供了参考依据。
The different dilatometric curves of continuous cooling transformation were determined by Gleeble-1500 thermal mechanical simulation.By dilatometric change and DSC analysis referencing microscopic test and hardness measurement,the continuous cooling transformation（CCT） diagram was obtained.According to the CCT diagram obtained above,the transformation of austenite at different cooling rates were analyzed,and the relationship between the cooling rates and the variation of microstructure and hardness was disclosed.At last the similar transition curve was investigated.The results show that martensite transition critical cooling velocity is 1.0？1.5 ℃/s.All those provide the references for productive practice and establishing new technic.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第7期1928-1933,共6页
Journal of Central South University:Science and Technology
基金
湖南省科技重大专项(2008FJ1003)
