正火回火14Ni3CrMoV锻钢微观组织的TEM研究  

TEM Study on the Microstructure of Wrought 14Ni3CrMoVSteel after Normalizing and Tempering Treatment

作　　者：雷运涛[1] 马建坡[2] 张金民[1] 

机构地区：[1]洛阳船舶材料研究所,洛阳471039 [2]西安交通大学机械工程学院,西安710049

出　　处：《材料开发与应用》2003年第2期1-3,14,共4页Development and Application of Materials

摘　　要：利用透射电镜 (TEM)研究了 1 4Ni3CrMoV锻钢正火 +回火后的微观组织。结果表明 ,该钢在正火过程中形成的以贝氏体为主的组织在高温回火过程中发生了明显变化。碳化物大量析出 ,分布均匀 ,大部分仍保持一定的方向性 ,显示原贝氏体铁素体板条的位向。局部存在铁素体 +球化碳化物类组织。The microstructure of the wrought 14Ni3CrMoV steel after normalizing and tempering treatment has been investigated by transmision electron microscopy(TEM). The results show that the predominant bainitic microstructure, formed in the normalizing process, has changed distinctly after high temperature tempering. There are abundant carbides precipitated, distributing homogeneously in the matrix. Most of these carbides are arranged orderly, orienting the direction of the original lath bainitic ferrite. A constituent of ferrite and carbide exists in some region and the block residual austenite which is dominant in the normalized state is not found after tempering.

关 键 词：微观组织 14NiCrMoV锻钢 正火 回火 贝氏体组织 透射电镜 TEM 调质处理 

分 类 号：TG156.4[金属学及工艺—热处理] TG156.5[金属学及工艺—金属学]