12%Cr超超临界转子钢的静态再结晶行为  

Static recrystallization behavior of 12% Cr ultra-supercritical rotor steel

作　　者：张学忠[1] 刘建生[1] 焦永星 李飞[1] 陈飞[1] Zhang Xuezhong;Liu Jiansheng;Jiao Yongxing;Li Fei;Chen Fei(School of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan Shanxi 030024,Chin)

机构地区：[1]太原科技大学材料科学与工程学院,山西太原030024

出　　处：《金属热处理》2024年第9期91-95,共5页Heat Treatment of Metals

基　　金：太原科技大学科研启动基金(20222021)。

摘　　要：通过在Gleeble-1500D热模拟试验机上对12%Cr超超临界转子钢进行热压缩试验,试验按照双道次进行,研究该材料在高温状态下的静态再结晶行为。讨论了应变速率和预应变对材料的静态再结晶行为的影响,阐述了变形温度和道次间隔时间等因素的影响效果。根据试验结果,建立了该材料的静态再结晶动力学模型和静态再结晶晶粒尺寸模型。试验结果表明,温度升高、预应变的增加都会使静态再结晶体积分数增大,而应变速率的增大和道次间隔时间的延长也有利于静态再结晶的发生。通过计算获得该材料的静态再结晶激活能为3.155×10^(5) J/mol,并结合静态再结晶晶粒长大模型,确立了晶粒细化工艺条件。Static recrystallization behavior of 12%Cr ultra-supercritical rotor steel at high temperature was studied by double-pass hot compression test using Gleeble-1500D thermomechanical simulator.Effects of strain rate and prestrain on the static recrystallization behavior of the tested material were discussed,and effects of deformation temperature and pass interval time were also elaborated.According to the test results,the kinetics model for static recrystallization and the static recrystallization grain size model of the material were established.The results show that the volume fraction of static recrystallization increases with the increase of temperature and prestrain.Moreover,the increase of strain rate and the extension of pass interval time are also conducive to the occurrence of static recrystallization.The static recrystallization activation energy of the material is calculated to be 3.155×10^(5) J/mol.Combined with the static recrystallization grain growth model,the grain refinement process conditions are established.

关 键 词：12%Cr超超临界转子钢 静态再结晶 动力学模型 晶粒尺寸模型 

分 类 号：TG142[一般工业技术—材料科学与工程]