C含量对Fe-30Mn-11Al-xC钢组织及热变形行为的影响  

Effect of carbon content on microstructure and hot deformation behavior of Fe-30Mn-11Al-xC steel

作　　者：张婧 王存宇[1] 熊敏 王辉[1] 高梓原 曹文全[1] ZHANG Jing;WANG Cunyu;XIONG Min;WANG Hui;GAO Ziyuan;CAO Wenquan(Research Institute of Special Steels,Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China)

机构地区：[1]钢铁研究总院有限公司特殊钢研究院,北京100081

出　　处：《钢铁研究学报》2023年第12期1517-1526,共10页Journal of Iron and Steel Research

基　　金：国家重点研发计划资助项目(2017YFB0304401)。

摘　　要：研究了C质量分数为0.6%~1.5%时Fe-30Mn-11Al-xC钢的微观组织,利用Gleeble-3800热模拟试验机研究了850~1150℃、0.1 s^(-1)条件下试验钢的热变形行为和再结晶规律。研究结果表明,C含量增加扩大奥氏体相区并促进κ-碳化物析出行为,试验钢组织逐渐由铁素体+奥氏体双相组织转变为奥氏体+κ碳化物;固溶强化和析出强化作用使试验钢硬度和热变形抗力随C含量增加而增加,且固溶强化效果要高于析出强化;试验钢中κ-碳化物和B2相析出抑制了奥氏体相的再结晶行为,使得高C含量下的再结晶程度更小。The microstructure and hot deformation behavior of Fe-30Mn-11Al-xC steel were studied with C content of 0.6%-1.5%,by using Gleeble3800 thermal simulation testing machine under deformation temperatures from 850℃to 1150℃,and strain rate of 0.1s^(-1).The results show that the increase of C content expands the austenite phase zone and promotesκ-carbide precipitation behavior,the microstructure of the test steel gradually changes from ferrite+austenite duplex structure to austenite+κ-carbide;with the increase of C content,the hardness and hot deformation resistance of the test steel are increased by the effect of solution strengthening and precipitation strengthening,and the effect of solution strengthening is higher than that of precipitation strengthening;the precipitation ofκ-carbide and B2 phase in test steel inhibits the recrystallization behavior of austenite phase,which makes the recrystallization degree smaller at high C content.

关 键 词：C含量 FeMnAlC钢 动态再结晶 热变形 微观组织 

分 类 号：TG142.1[一般工业技术—材料科学与工程]