钛-钢爆炸复合板热处理过程中的扩散行为及数学模型

Diffusion Behavior and Mathematical Model of Ti-Steel Explosive Clad Plate

摘要:

利用光学显微镜、扫描电子显微镜、X射线衍射仪、俄歇电子能谱分析仪和拉剪实验，研究了不同的热处理加热温度和保温时间对钛-钢爆炸复合板界面组织特征和性能的影响。热处理温度为750、850、950 ℃，保温时间为30、60、120 min。结果表明：热处理过程加速了组织转变和界面元素扩散。界面元素扩散主要形成的化合物为TiC和Ti-Fe金属间化合物（Fe2Ti/FeTi）。随着温度的升高，界面扩散层厚度增加，复合板剪切强度下降。根据实验数据，提出了界面扩散层厚度和剪切强度与加热温度和保温时间的函数关系

Abstract:

Effects of heat treatments on microstructure and mechanical properties of Ti-steel explosive clad plates were investigated by optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), auger electronic spectrum (AES) and shear test. The Ti-steel explosive clad plates were subjected to a heat treatment process in the temperature range of 650~950 oC for 30~120 min. The results show that the heat treatment process leads to a great enhancement of diffusion and microstructural transformation. During the heat treatment process, a large amount of Ti-Fe intermetallics (Fe2Ti/FeTi) along with some TiC distributing continuously are formed at diffusion reaction layer. With the treatment temperature increasing, the thickness of diffusion layer increases and the shear strength decreases, whose functional relationship was proposed with the heat temperature as well as the holding time according to the experimental data