变形温度对15Cr-25Ni-Fe基合金动态再结晶行为的影响  

Effect of deformation temperature on dynamic recrystallization of 15Cr-25Ni-Fe base superalloy

作　　者：向嵩[1,2] 鞠泉[3] 刘国权[4] 

机构地区：[1]贵州大学材料与冶金学院,贵州贵阳550003 [2]贵州省材料结构与强度重点实验室,贵州贵阳550003 [3]钢铁研究总院高温研究所,北京100081 [4]北京科技大学材料科学与工程学院,北京100083

出　　处：《材料热处理学报》2010年第3期97-101,共5页Transactions of Materials and Heat Treatment

基　　金：贵州省优秀科技教育人才省长专项资金项目(200815);国家自然科学基金资助项目(50901022;50334010);贵阳市科学技术计划项目(20082410)

摘　　要：利用Gleeble-1500热/力模拟机进行等温压缩实验,研究了15Cr-25Ni-Fe基合金在变形温度为950～1200℃,变形速率为0.1s-1和10s-1条件下的热变形行为,并将变形试样在980℃保温2h后空冷,对比变形试样固溶前后显微组织。结果表明:随着变形温度的升高,变形组织即动态再结晶晶粒逐渐增大;在1075～1100℃和10s-1及1050～1100℃和0.1s-1条件下变形的试样经固溶处理后晶粒发生粗化,这在一定程度上会影响合金的热加工性能。因此热加工中要避免工件处于上述变形条件,否则对组织控制极为不利。The hot deformation behavior of 15Cr-2Ni-Fe base superalloy was investigated by isothermal compression tests on a Gleeble-1500 thermal-mechanical simulator at temperature of 950-1200 ℃ with strain rates of 0.1 s^-1 and 10 s^-1 . The deformed samples were heated at 980 ℃ for 2 h and then cooled in air. The results show that the grain sizes of the deformation samples increase with the increase of the deformation temperature. After solution treatment, the grain size becomes coarse for the samples deformed at 10 s^-1 , 1075-1100 ℃ and 0.1 s^-1 , 1050-1100 ℃, and thus the process parameters are not suggested for this superalloy.

关 键 词：FE基合金 动态再结晶 变形温度 固溶处理 

分 类 号：TG111.7[金属学及工艺—物理冶金]