热处理工艺对冷轧薄带NiTi SMA组织状态影响的研究  

Effect of heat treatment on the structure of the cold rolled ribbon NiTi SMA

作　　者：刘庆锁[1] 孙永昌[1] 刘毅[1] 王玉红[1] 刘智勇[1] 朱穗东[1] 

机构地区：[1]天津理工学院材料科学与工程系,天津300191

出　　处：《天津理工学院学报》2002年第4期16-18,共3页Journal of Tianjin Institute of Technology

基　　金：天津市科委重点基金资助项目(013802011)

摘　　要：用DSC、X射线衍射及SEM等研究冷轧薄带NiTiSMA在不同热处理条件下的组织变化特征.结果表明,热处理冷却方式对冷轧态NiTiSMA的组织构成产生重要影响.热处理缓冷有利于Ti3Ni4富镍相的析出,且在600℃加热时,析出最明显,同时合金中发生B2→R→M的两步相变;而热处理快冷时富镍相Ti3Ni4析出不明显,且合金中主要发生B2→M相变.The structure characteristics of cold rolled ribbon NiTiSMA in different heat treatment technology have been studied by DSC, XRD and SEM.The results show that the cooling method in the heat treatment has great effect on the structure of the Nirich NiTiSMA in the cold rolled.Slow cooling is advantageous to the separateness of the Nirich phase Ti3Ni4,and the separateness of the Ti3Ni4 phase is the most apparent when heat treatment temperature is 600℃.At the same time slow cooling results in produced twostage transformation from B2 to R to M martensite in the alloy.One stage transformation from B2 to M martensite is produced chiefly in the alloy in the quickly cooling,while the separateness of the Nirich phase Ti3 Ni4 is't evident.

关 键 词：热处理工艺 组织状态 冷轧NiTi SMA薄带 析出 组织变化 富镍相 相变 组织构成 

分 类 号：TG166.5[金属学及工艺—热处理] TG15[金属学及工艺—金属学]