微碳低合金深冲双相钢的再结晶规律  

Recrystallization law of micro-carbon low alloy deep drawing dual phase steel

作　　者：周刘涛 潘红波[2,3] 潘烁 吴结文 Zhou Liutao;Pan Hongbo;Pan Shuo;Wu Jiewen(School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan Anhui 243002,China;Key Laboratory of Metallurgical Emission Reduction and Resources Recycling of Ministry of Education,Anhui University of Technology,Ma’anshan Anhui 243002,China;Anhui Province Key Laboratory of Metallurgical Engineering and Resources Recycling,Ma’anshan Anhui 243002,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002 [2]安徽工业大学冶金减排与资源综合利用教育部重点实验室,安徽马鞍山243002 [3]安徽工业大学冶金工程与资源综合利用安徽省重点实验室,安徽马鞍山243002

出　　处：《金属热处理》2020年第4期45-50,共6页Heat Treatment of Metals

基　　金：国家自然科学基金(51774006,U1860105);安徽省自然科学基金面上项目(1708085ME116);安徽省重大专项(18030901085)。

摘　　要：研究了一种微碳低合金钢在罩式退火过程中的再结晶组织演变和再结晶动力学规律,根据Johnson-Mell理论和Arrhenius再结晶激活能的计算,建立了再结晶体积分数与退火温度和等温时间的热力学模型及退火温度与完全再结晶所需时间的动力模型。结果表明,两个模型相互得到验证,并都揭示了随退火温度的增加,再结晶孕育期和完成时间缩短的规律;在同一温度下,随保温时间的延长,再结晶体积分数增加直至完全再结晶。另外,发现在Ac1附近退火时,存在再结晶与相变的竞争现象,当保温时间较短时以再结晶过程为主,而长时间保温时则以相变过程为主。Recrystallization microstructure evolution and recrystallization kinetics of a micro-carbon low alloy steel during batch annealing were studied. According to the calculation of the Johnson-Mell theory and the Arrhenius recrystallization activation energy, the thermodynamic model of the relationship between recrystallization volume fraction and annealing temperature and isothermal time was established,and so was the dynamic model of the relationship between the annealing temperature and the time required for complete recrystallization. The results show that the two models verify each other and the recrystallization incubation period and completion time are shortened with the increase of annealing temperature. At the same temperature,the volume fraction of recrystallization increases until complete recrystallization with the increase of holding time. In addition,it is found that there is a competition phenomenon between recrystallization and phase transformation when annealing temperature is near Ac1. The recrystallization process is the main phenomenon as the holding time is short while phase transformation process has a perfectly advantage as the holding time is long.

关 键 词：再结晶 激活能 退火温度 保温时间 

分 类 号：TG142.2[一般工业技术—材料科学与工程]