(华南理工大学 国家金属材料近净成形工程技术研究中心，广州 510640)
摘 要: 采用差示扫描量热法(DSC)对SiCp/6061复合材料和6061合金时效析出动力学进行研究，并结合Avrami-Johnson-Mehl方法分析SiCp的加入对6061铝合金时效析出动力学的影响，计算出连续升温过程中各亚稳相的析出动力学参数。结果表明：SiCp抑制6061铝合金GP区的形成，促进β″相、β′相和Q′相、β相和Q相的析出。计算各相析出动力学表达式及TTT曲线，利用硬度测试实验对计算结果进行对比验证。
关键字: SiCp/6061；析出动力学；差热分析法；TTT曲线
（National Engineering Research Center of Near-net-shape Forming for Metallic Materials, South China University of Technology, Guangzhou 510640）
Abstract:The kinetics of precipitation during aging of SiCp/6061 composites and 6061 alloys were investigated by differential scanning calorimetric analyses (DSC). The influence of SiCp on the precipitation kinetics of 6061 matrix was analyzed. The kinetic parameters of metastable phases in the composites and alloys were obtained by using Avrami-Johnson-Mehl (AJM) equation. The results show that GP zone formation is significantly suppressed with the addition of SiCp, while the precipitation of β″, β′ and Q′, β and Q phases are enhanced. In addition, TTT curves and kinetic expresses of metastable phases for the composites and alloys were calculated. The calculation results are compared and validated with hardness measurement, showing good agreement between the calculation and experiment results.
Key words: SiCp/6061 composite; precipitation kinetics; differentia scanning calorimetry; TTT curve
