摘要
利用Gleeble3500热模拟试验机进行了双道次热压缩实验,通过实验研究了X80管线钢在热塑性变形道次间隔时间内奥氏体的亚动态再结晶行为,依据实验数据计算得到了X80管线钢的亚动态再结晶激活能,并建立了X80管线钢亚动态再结晶动力学模型。结果表明:应变速率以及变形温度是X80管线钢亚动态再结晶主要影响因素,其他变形条件的影响较弱,亚动态再结晶软化分数随着间隔时间增大而升高。
In order to study the metadynamic recrystallization behavior of X80 pipeline steel, the double-pass hot compressionexperiment of X80 pipeline steel was carried out with Gleeble-3500 thermal-mechanical simulation test machine under differ-ent interval insulation time, deformation rates and deformation temperatures. The experimental results show that the longer thetime interval, the greater the degree of softening of the material. And with the increase of deformation rate and deformationtemperature, the volume fraction of metadynamic recrystallization increases. Based on the experimental results, the metady-namic model of the metadynamic recrystallization of X80 pipeline steel is established, and the model is validated by comparingwith the experimental data. The metadynamic recrystallization kinetic model provides theoretical basis and data reference forfurther simulating, predicting and controlling the microstructure of X80 pipeline steel, optimizing the rolling process and im-proving the product performance.
出处
《机械研究与应用》
2017年第4期57-59,68,共4页
Mechanical Research & Application
关键词
管线钢
双道次压缩
奥氏体
亚动态再结晶
动力学模型
pipeline steel
double-pass hot compression
austenite
metadynamic recrystallization
kinetic model
