23Co13Ni11Cr3Mo钢的奥氏体静态再结晶行为  

Austenite static recrystallization behavior of 23Co13Ni11Cr3Mo steel

作　　者：黄始全[1] 易幼平[1] 李蓬川[2] 

机构地区：[1]中南大学机电工程学院高性能复杂制造国家重点实验室,长沙410083 [2]中国第二重型机械集团公司万航模锻厂,德阳618000

出　　处：《粉末冶金材料科学与工程》2013年第4期497-502,共6页Materials Science and Engineering of Powder Metallurgy

基　　金：国家重点基础研究发展规划(973计划)资助项目(2011CB706802);国家重大专项(2012ZX04010-081)

摘　　要：利用GleebIe-1500热模拟实验机研究23Co13Ni11Cr3Mo超高强钢高温变形道次间隔时间内的静态软化行为,讨论变形温度、应变速率、变形程度、间隔时间及初始奥氏体晶粒尺寸等对其静态再结晶行为的影响。结果表明:变形程度对23Co13Ni11Cr3Mo钢的静态再结晶影响最大,增大变形量可获得均匀细小的晶粒组织;变形温度和间隔时间次之;应变速率及初始奥氏体晶粒尺寸的影响较小。根据实验结果,建立23Co13Ni11Cr3Mo钢静态再结晶晶粒尺寸模型,定量分析起落架在锤锻压机上整体模锻成形过程的组织演化,发现在变形不充分的条件下静态再结晶是导致起落架锻件晶粒不合格的原因。模型预测结果与实验结果吻合较好。The static recrystallization behaviors of 23Co13Ni11Cr3Mo ultrahigh strength steel were investigated by GleebIe-1500 machine.Effects of deformation temperature,strain rate,deformation degree,interval time and initial austenite grain size on static recrystallization behaviors were studied.The results show that the effect of deformation degree is more significant,while those of strain rate and initial austenite grain size are little slight.Small and even grain can be achieved by increasing deformation degree.Based on experimental results,grain size model of static recrystallization for 23Co13Ni11Cr3Mo steel was developed.Microstructure evolution of landing gear during integer die forging on hammer press was analyzed quantitatively by the established model.Static recrystallization under low deformation degree is found to be the reason for grain dissatisfaction.And a good fitness between experimental results and predicted results is achieved in landing forging process.

关 键 词：超高强钢 23Co13Ni11Cr3Mo 静态再结晶 晶粒尺寸 

分 类 号：TG142[一般工业技术—材料科学与工程]