00Cr12Ni11Mo1Ti2高强度不锈钢的热加工图与显微组织分析  

Hot processing map and microstructure analysis of 00Cr12Ni11Mo1Ti2 high-strength stainless steel

作　　者：王林 王晓辉[2] 刘振宝[2] 刘键恒[2,3] 王奔驰 周晓龙 WANG Lin;WANG Xiao-hui;LIU Zhen-bao;LIU Jian-heng;WANG Ben-chi;ZHOU Xiao-long(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093,China;Institute of Special Steels,Central Iron and Steel Research Institute,Beijing 100081,China;School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]钢铁研究总院特殊钢研究院,北京100081 [3]南京理工大学材料科学与工程学院,江苏南京210094

出　　处：《材料热处理学报》2023年第9期178-187,共10页Transactions of Materials and Heat Treatment

摘　　要：为了获得00Cr12Ni11Mo1Ti2高强度不锈钢热加工图,优化其热加工工艺参数,采用Gleeble-3800型热模拟试验机,在变形温度为850~1150℃,应变速率为0.01~10 s^(-1)的条件下对试验钢进行了热压缩试验,研究了其热变形行为。构建了试验钢在峰值流变应力下的本构方程,并且基于动态材料模型构建了能量耗散图,并分别采用Prasad和Murthy两种失稳判据构建了试验钢的塑性失稳图。结果表明:00Cr12Ni11Mo1Ti2钢在能量耗散率低于0.3的变形区间内同样可以发生动态再结晶,在应变速率为1.0~10 s^(-1),变形温度为850~1000℃的区间内,试验钢仅发生了部分动态再结晶且伴有大量的局部变形带产生,与Murthy准则预测的塑性失稳区更加吻合;在变形温度为1050~1150℃,应变速率为0.01~10.0 s^(-1)的区间内试验钢具有最佳的热加工性能,可获得细小均匀的原奥氏体晶粒组织。In order to obtain the hot processing map of 00Cr12Ni11Mo1Ti2 high-strength stainless steel and optimize its hot working process parameters,a Gleeble-3800 thermal simulation testing machine was used to conduct hot compression tests on the experimental steel at deformation temperature of 850-1150℃and strain rate of 0.01-10 s^(-1),and its hot deformation behavior was studied.The constitutive equation of the experimental steel under peak flow stress was constructed,and the energy dissipation diagram was constructed based on the dynamic material model.The plastic instability diagram of the experimental steel was constructed using Prasad and Murthy instability criteria,respectively.The results show that the 00Cr12Ni11Mo1Ti2 steel can also undergo dynamic recrystallization in the deformation range where the energy dissipation rate is lower than 0.3.In the range where the strain rate is 1.0 to 10 s^(-1)and the deformation temperature is 850 to 1000℃,the experimental steel only undergoes partial dynamic recrystallization accompanied by a large number of local deformation bands,which is more consistent with the plastic instability zone predicted by the Murthy criterion.The experimental steel has the best hot workability in the range of deformation temperature of 1050-1150℃and strain rate of 0.01-10.0 s^(-1),and can obtain fine and uniform primary austenite grain structure.

关 键 词：高强度不锈钢 本构方程 局部变形带 热加工图 塑性失稳 

分 类 号：TG142.7[一般工业技术—材料科学与工程]