中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 10 No. 2 April 2000 |
properties of in situ TiCp/Fe composites①
（1. State Key Laboratory of Advanced Technologyfor Materials Synthesis and Processing,
Wuhan University of Technology, Wuhan 430070, P.R.China;
2. School of Materials Science and Engineering, Huazhong University of Science and Technology,
Wuhan 430074, P.R.China）
Abstract:The effects of the reactive temperature, time and the cooling rate of an Fe-Ti-C alloy melt on the microstructures and mechanical properties of in situ TiCp/Fe composites were investigated. The results show that the hardness and impact toughness of the prepared composites increase with increasing the reactive temperature, because more and finer TiC particles are formed in the higher temperature melt. However, after the TiC synthesis reaction in the melt completed, the impact toughness of the composites will decrease if the melt reactive time is further prolonged, owing to the coarsening of the formed TiC particles. Under the present experimental condition, the cooling rate of the melt containing dispersions has little influence on the number, size and distribution of the particles in the composites.
Key words: in situ reaction; microstructure; property; TiCp/Fe composites
