Effect of heat treatment on microstructure and mechanical property of Ti-steel explosive-rolling clad plate  

热处理对钛-钢爆炸轧制复合板组织和性能的影响（英文）

作　　者：江海涛[1] 阎晓倩[1] 刘继雄[2] 段晓鸽[1] 

机构地区：[1]北京科技大学高效轧制国家工程研究中心,北京100083 [2]宝钛集团有限公司,宝鸡721014

出　　处：《Transactions of Nonferrous Metals Society of China》2014年第3期697-704,共8页中国有色金属学报（英文版）

摘　　要：The effect of heat treatment on microstructure and mechanical properties of the Ti-steel explosive-rolling clad plate was elaborated by optical microscopy （OM）, scanning electron microscopy （SEM）, X-ray diffraction （XRD）, transmission electron microscopy （TEM）, micro-hardness test and shear test. The composites were subjected to heat treatment at temperature of 650-950 ~C for 60 min. The results show that the heat treatment process results in a great enhancement of diffusion and microstructural transformation. The shear strength decreases as the treatment temperature increases. Heated at 850 ℃ or below, their shear strength decreases slowly as a result of the formation of TiC in the diffusion interaction layer; while at the temperature of 850 ℃ or above, the shear strength decreases obviously, which is the consequence of a large amount of Ti-Fe intermetaUics （Fe2Ti/FeTi） along with some TiC distributing continuously at diffusion reaction layer.利用光学显微镜、扫描电子显微镜、X射线衍射仪、透射电子显微镜、显微硬度计和拉剪实验,研究不同热处理温度对钛-钢爆炸轧制复合板界面组织特征和性能的影响。热处理温度为650、750、850、950°C,保温时间为60 min。结果表明:热处理过程加速界面元素扩散和组织的转变。随着温度的升高,复合板剪切强度下降。在850°C及以下温度热处理时,扩散反应层形成化合物TiC,剪切强度下降缓慢。当热处理温度超过850°C时,扩散反应层形成大量的Ti-Fe金属间化合物(Fe2Ti/FeTi)及少量的TiC,剪切强度明显下降。

关 键 词：Ti-steel explosive-rolling clad plate heat treatment DIFFUSION mechanical properties 

分 类 号：TG156[金属学及工艺—热处理]