10Ni3MnCuAl钢加热和冷却过程中的显微组织演变  

Microstructure evolution of 10Ni3MnCuAl steel during heating and cooling

作　　者：胡一迪 迟宏宵[2] 周晓龙[1] 周健[2] 马党参[2] Hu Yidi;Chi Hongxiao;Zhou Xiaolong;Zhou Jian;Ma Dangshen(School of Material Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China;Special Steels Research Instiute,Central Iron ＆ Steel Research Institute,Beijing 100081,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所,北京100081

出　　处：《金属热处理》2018年第9期157-161,共5页Heat Treatment of Metals

基　　金：高硬度预硬化塑料模具钢研制(Z171100002317030)

摘　　要：采用高温金相技术,研究了10Ni3Mn Cu Al钢加热至950℃以及保温过程中的显微组织演变行为和其后200℃/min冷速下的马氏体相变行为及其切变特点。结果表明：试验钢在加热到950℃奥氏体化过程中,新的奥氏体晶粒会在原始晶界处和晶内同时形核并长大。随着保温时间的延长,奥氏体晶粒逐渐长大,最终形成平均晶粒尺寸为20μm、大小均匀的晶粒。在其后冷却过程中,试验钢发生马氏体转变,原奥氏体晶粒尺寸不变。The microstructure evolution behavior of 10Ni3MnCuAl steel was investigated by using high temperature metallographic technology during the heating process and isothermal transformation process at 950 ℃,and the martensitic transformation behavior including its shear characteristics at cooling speed of 200 ℃/min was also studied. The results show that in the austenitizing process of the tested steel heated to950 ℃,new austenite grains form and grow on the grain boundary and in the grains at the same time. The austenite grains grow up gradually with the increase of holding time,finally grow into uniform grains with average size of 20 μm. In the cooling process,martensite transformation occurs in the tested steel,with the prior austenite grain size keeps unchanged.

关 键 词：10Ni3MnCuAl钢 高温金相 奥氏体化 马氏体相变 

分 类 号：TG142.45[一般工业技术—材料科学与工程]