热变形403Nb钢的再结晶动力学  

Recrystallization kinetics of hot deformed 403Nb steel

作　　者：王立民[1] 宁小智[1,2] 刘宁[1,2] 刘正东[1] 杨钢[1] 

机构地区：[1]钢铁研究总院结构材料研究所,北京100081 [2]昆明理工大学材料与冶金工程学院,云南昆明650093

出　　处：《材料热处理学报》2010年第1期57-61,共5页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金重点项目(50634030)

摘　　要：采用Gleeble3500热模拟试验机对403Nb马氏体叶片钢在单道次和双道次热压缩条件下的再结晶动力学行为进行了研究。经过计算得出了403Nb钢热压缩变形时的流变应力方程、静态再结晶动力学方程、静态再结晶晶粒尺寸模型以及亚动态再结晶动力学方程。403Nb钢在1100℃-1150℃,应变速率在0.01-1s^-1的条件下,发生较明显的动态再结晶。在变形组织中有细小孪晶生成,孪晶尺寸为30-100 nm。Recrystallization behavior of 403Nb martensite blade steel under one and double pass hot compressions was investigated on a Gleeble-3500 simulator.Modelling of recrystallization kinetics of the hot deformed steel was obtained.The flow stress formula under hot compression,kinetics equation of static recrystallization,model of static-recrystallized grain size and kinetics equation of metadynamic-recrystallization for the steel were deduced based on experiment and calculation.Dynamic recrystallization occurs when 403Nb is deformed at 1100-1150 ℃ and strain rate of 0.01-1s^-1.There are some thin twins formed in the deformed steel,size of the twins is 30-100 nm.

关 键 词：403Nb钢 叶片钢 再结晶动力学 

分 类 号：TG142.24[一般工业技术—材料科学与工程]