力学性能的影响
(1. 哈尔滨工业大学 航天学院， 哈尔滨 150001；
2. 哈尔滨理工大学 材料科学与工程学院， 哈尔滨 150080)
摘 要: 通过不同的热处理工艺改变原位TiCp/Fe复合材料的基体组织，探讨了原位TiCp/Fe复合材料不同基体组织与性能的关系。试验结果表明： 在热处理过程中基体组织明显改变， TiC增强相不发生变化。退火处理降低材料的硬度， 提高材料的韧性。 淬火+低温回火处理使材料的强度和硬度提高，而韧性没有明显的下降。 采用等温淬火工艺， 可使TiCp/Fe复合材料具有最好的综合力学性能。
关键字: TiCp/Fe复合材料； 热处理； 组织； 性能
properties of in-situ TiCp/Fe composites
（1. School of Astronautics, Harbin Institute of Technology,Harbin 150001, China;2. College of Materials Science and Engineering,
Harbin University of Science and Technology,Harbin 150080, China）
Abstract:The matrix microstructure of TiCp/Fe composites was changed under different heat treatment processes. The relations between different matrix microstructures and properties were discussed. The results show that the particulates of TiC have no change in heat treatment, but the matrix microstructure has changed in the same situation. When the composite being annealed, the hardness of composite can be lowered and the toughness of composite can be improved. The quenching+tempering at low temperature could enhance the strength and hardness with few decrease of toughness. After isothermal quenching, TiCp/Fe composites possess the best mechanical properties.
Key words: TiCp/Fe composites; heat treatment; microstructure; prop
