Research on Mediate Temperature Decomposition of High Nitrogen Austenite
Research on Mediate Temperature Decomposition of High Nitrogen Austenite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]
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.