The Microstructure Evolution during Partitioning Process in a One-step Q&P Steel
Quenching and partitioning (Q&P) process is a heat treatment of martensite which is different to customary quenching and tempering.In this paper,a Q&P process which is partially austenized followed by a one-step quenching and partitioning procedure was applied to a low-carbon Mn-Si-Al TRIP-aided steel.The purpose of this experiment is to investigate the phase transformations during partially austenized with different annealing temperatures and partitioning times.The work was carried out in a dilatometer.The microstructure was characterized by means of electron probe microanalysis (EPMA).The results shows that the microstructures formed are ferrite,martensite,bainite and retained austenite.The results obtained by dilatometry reveals that the volume fraction of bainite increases with the prolongation of partitioning time and the temperature interval of bainite was not only above and also below the Ms temperature.The microstructures developed into temper morphology along with the prolongation of partitioning time,and the carbide was suppressed due to the effect of Al and Si elements.
carbon partitioning phase transformation bainite transformation
PENG Fei GU Xingli Wang Yuan XU Yunbo
State Key Laboratory of Rolling and Automation, Northeastern University,Shenyang 110819, Liaoning, China
国际会议
成都
英文
547-550
2016-11-16（万方平台首次上网日期，不代表论文的发表时间）