23CrNi3Mo钢动态再结晶行为和组织演变研究  

Research on dynamic recrystallization and microstructure evolution of 23CrNi3Mo steel

作　　者：闫永明[1] 刘雅政[1] 周乐育[1] 徐盛[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料科学与工艺》2014年第1期42-47,共6页Materials Science and Technology

摘　　要：利用Gleeble-1500热模拟试验机进行单道次热压缩变形,通过控制变形温度(900,950,1 000,1 050℃)和应变速率(0.01,0.1和1 s-1)研究了23CrNi3Mo钢的动态再结晶行为,分析了变形温度、应变速率对动态再结晶行为和组织演变的影响.结果表明:23CrNi3Mo钢动态再结晶的再结晶激活能为293.23 kJ/mol;采用θ-σ模型较精确地获得了发生动态再结晶的临界应变与峰值应变,并确定了其平均比值εc/εp=0.63;确定了材料常数和热变形本构方程.通过对热模拟实验数据的分析和显微组织观察,建立了不同变形条件下动态再结晶模型和晶粒尺寸模型.Dynamic recrystallization behavior of 23CrNi3Mo steel was investigated by means of single-pass compression tests on a Gleeble-1500 thermo-mechanical simulator at temperature of 900, 950, 1 000, 1 050 ℃ and strain rate of 0.01, 0.1 and 1 s^-1. The influence of temperature and strain rate on dynamic recrystallization and microstrueture of 23CrNi3Mo drill steel was studied. The results show that the DRX activation energy of the 23CrNi3Mo steel is 293.23 kJ/mol. A method was developed to determine the critical strain and the peak strain, and the average value of εc/εp is 0.63. The material parameters in the hyperbolic sine constitutive equation were determined, and the dynamic recrystallization model and grain size model are set up by data of thermo-simulation and microstructure.

关 键 词：23CrNi3Mo 应变速率 变形温度 动态再结晶 晶粒尺寸 

分 类 号：TG142.1[一般工业技术—材料科学与工程]