借助于ＯＭ，ＳＥＭ，ＴＥＭ及ＡＥＳ和ＸＲＤ等测试技术和手段，系统地研究和深入探讨了钛（ＴＡ２）／钢（Ａ３）爆炸复合界面扩散反应区内的微观组织结构、反应相的形成和生长规律，结果表明：经１１７３Ｋ以下（即ＴＡ２的β转变温度以下）热处理，在ＴＡ２侧界面形成ＴｉＣ，它阻碍Ｆｅ和Ｔｉ互扩散，不能生成Ｆｅ_（２）Ｔｉ，ＦｅＴｉ．经１２２３Ｋ以上（即在ＴＡ２的β转变温度以上）热处理，沿界面生成按抛物线规律长大的层状金属间化合物（Ｆｅ２Ｔｉ，ＦｅＴｉ）；并由于Ｆｅ的扩散，在ＴＡ２侧Ｆｅ的含量高处形成β－Ｔｉ或β－Ｔｉ＋α－Ｔｉ组织，而在Ｆｅ含量低处形成马氏体转变产物，此外，β转变层也按抛物线规律生长．
The microstructure togtether with the formation and growth of reaction phases in the interfacial diffusion zone of the explosive cladding. TA2/A3 has been investigated by means of OM. SEM, TEM, AES and XRD techniques. When the specimen is heat-treated at temperature under the β-Ti-α-Ti transformation. i.e., below 1173 K. only TiC forms along TA2 side of interface and hinders the interdiffuion of Fe and Tiatoins. thus Fe2Ti or FeTi is unable to occur. While it is treated up to the transformation temperature of β-Ti. e.g., over 1223 K, the parabolic growth of intermetallic compounds of Fe2Ti and FeTi with layer structure may form intergranularly and the formation of β-Ti or β-Ti + α-Ti structure at the Fe-enriched side of TA2 and of the martensitic transformation products at the Fe-depleted side were observed owing to diffusion of Fe. Furthermore, the growth of β-Ti transformation layer is revealed to follow the parabolic rule. (Correspondent:YANG Yang, Department of Materials Scince and Engineering, Cemral South University of Technology Changsha 410083)
参考文献
| [1] | |
| [2] | 杨扬,张新明,李青云,李正华,中国有色金属学报,1994:3(3):932XiaChangqing,JinZhanpeng．JLeess-CommonMetals,1990:162 |
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