Research on Mediate Temperature Decomposition of High Nitrogen Austenite

作     者：LIXiao-ling BEIDuo-hui HUMing-juan ZHUZu-chang LI Xiao-ling, BEI Duo-hui, HU Ming-juan, ZHU Zu-chang School of Material Science and Engineering, Shanghai Jiao Tong University, Shanghai, China

作者机构：SchoolofMaterialScienceandEngineeringShanghaiJiaoTongUniversityShanghaiChina 

出 版 物：《材料热处理学报》 (Transactions of Materials and Heat Treatment)

年 卷 期：2004年第25卷第5期

页      面：214-216页

核心收录：

学科分类：080503[工学-材料加工工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0802[工学-机械工程] 0704[理学-天文学] 0702[理学-物理学] 080201[工学-机械制造及其自动化] 

主　　题：高氮奥氏体 温度分解 微硬度 TEM 

摘      要：The decomposed products from high nitrogen austenite aging at 225°C were investigated by TEM. It is found that the shape of decomposition products inside the austenite grains is not regular and not strictly oriented. Preferential nucleation of y-Fe4N at dislocations and grain boundaries has been observed. It also has been found that during the first stage of the high nitrogen austenite decomposition a large quantity of ultra-fine /-Fe4N precipitate inside the parent austenite, which has been thought to be the undecomposed region before. The ultimate products are composed of highly dispersed a-Fe and /-Fe4N, with both of them maintaining nanometer scale. The micro-hardness of them can be as high as 900HV.