摘要
通过对奥氏体再结晶行为的研究得到35CrMo钢发生动态再结晶的形变条件为:形变温度T>1000℃,应变速率ε≤1/s.描述动态再结晶动力学方程f=1-exp(-b(Z)tn(Z))中的系数b和n与变形参数Z有关.计算值与实测值较为吻合.通过非线性回归得到35CrMo钢的动态再结晶晶粒尺寸的关系式为:DDRX=2.25 × 104Z-0.22.通过双道次压缩和单道次压缩保温实验,得出35CrMo钢静态再结晶激活能和动力学方程.
The recrystallization behavior of the steel 35CrMo during hot deformation was investigated using physical simulation experiments, and the condition of dynamic recrystallizaiton (DRX) was obtained to be: T >1000 degreesC, epsilon less than or equal to1/s, A modified DRX kinetic equation is submitted as: f = 1 - exp(-b(Z)/t(n(Z))), from which the DRX fraction calculated is good agreement with the experiments. An equation describing dynamic recrystallization grain size can be written as D-DRX = 2.25 x 10(4) Z(-0.22). Through the 2-stroke compression and 1-stroke compression followed by holding temperature experiment, the activation energy and kinetics equation of static recrystallization (SRX) of the steel 35CrMo are also obtained.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2004年第10期1109-1114,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金资助项目 50075053
关键词
动力学方程
晶粒尺寸
静态再结晶
steel 35CrMo
kinetic equation
grain size
static recrystallizaiton
