摘要
对冷拔形变热轧态低碳Si-Mn双相钢,经400～550℃加热5min及30min后的显微组织、力学性能以及回复动力学特征进行了研究。结果表明:冷拔形变75.2％的试验钢,500℃时回复阶段的激活能与铁在α-Fe中的自扩散激活能数值大体相近。可以认为试验钢在该温度下30min加热时,回复过程受控于α-Fe中Fe的自扩散。
By using TEM and tensile test, the feature of recovery kinetics in cold- drawn as-hot-rolled Si-Mn dual-phase steel was investigated. The results show that when the steel was heated for 30 min at≤500℃, only recovery process was occurred. Heated at 500℃, the activation energies of recovery process of the steels are 187.9kJ/mol(steel J) and 220.6kJ/mol(steel H) respectively. These values are close to the self-diffusional activation energy of iron in α-Fe(239.7kJ/mol). It is considered that the recovery process at this temperature is controlled by the self-diffusion of iron in α-Fe.
出处
《北京科技大学学报》
EI
CAS
CSCD
北大核心
1992年第4期458-462,共5页
Journal of University of Science and Technology Beijing
关键词
热轧
双相钢
冷拉
钢丝
回复
as-hot-rolled dual-phase steel, cold-drawn wire, recovery
