ISSN: 1003-6326
CN: 43-1239/TG
CODEN: TNMCEW

Vol. 10    No. 2    April 2000

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Effects of technological parameters on microstructures and
properties of in situ TiCp/Fe composites①
YAN You-wei(严有为)1, WEI Bo-kang(魏伯康)2,
FU Zheng-yi(傅正义)1, LIN Han-tong(林汉同)2, YUAN Run-zhang(袁润章)1
(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
Superintended by The China Association for Science and Technology (CAST)
Sponsored by The Nonferrous Metals Society of China (NFSOC)
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