金属加工（热加工）Issue(6)：127-132,6.
奥氏体化温度对DC53钢淬回火组织特性及热动力学的影响
The effect of austenitization temperature on the microstructure characteristics and thermodynamics of DC53 steel after quenching and tempering
摘要
Abstract
The influence of austenitization temperature on the microstructure and thermodynamics of DC53 steel was investigated using OM,SEM,Jmatpro software calculation,and Image proplus 6.0 analysis.The results showed that with the increase of austenitization temperature,the grain size of the microstructure decreased,and the grain boundary morphology changed from curved to straight.The uniformity and stability of grain size were improved.At 1040℃,the austenite grain growth tendency and grain boundary morphology mutation were significant.The unmelted carbides are mainly M7C3 type,and their strong carbide elements Cr and Mo decrease with increasing austenitization temperature,while the content of V and Mn elements is relatively stable.After quenching and tempering,the phase consists of martensite,austenite,(Cr2.5Fe43Mo0.1)C3 and(Cr,Fe)7C3 type carbides.During the temperature rise process,the content of solid solution alloy and carbon element in the austenite phase increases,and the austenitization temperature characterized by quenching microstructure is more suitable between 1020 ℃and 1040 ℃.During the austenitization process,the activity of alloying elements is greater than zero,and the partial molar potential energy decreases with increasing austenitization temperature and is less than zero.关键词
奥氏体化温度/DC53钢/组织/热动力学Key words
austenitizing temperature/DC53 steel/microstructure/thermodynamics引用本文复制引用
宋绍峰,李秀兰,王宣..奥氏体化温度对DC53钢淬回火组织特性及热动力学的影响[J].金属加工（热加工）,2025,(6):127-132,6.基金项目
重庆市教委科技项目(KJQN202203704、KJQN202403704) （KJQN202203704、KJQN202403704）
校级项目(XJPY202308). （XJPY202308）
