摘要
选用粒径为12μm的SiC颗粒和19μm的2024铝合金粉末,采用热等静压工艺制备体积分数为55%的SiC_(p)/2024Al复合材料,研究固溶时效处理对SiC_(p)/2024Al复合材料微观组织和力学性能的影响。结果表明,真空热等静压法制备的复合材料组织致密,SiC颗粒与铝合金结合良好。时效过程中SiC_(p)/2024Al复合材料呈现出双峰时效行为,与铝合金相比,复合材料提前达到峰时效状态,此时基体中主要强化相为θ″相与S″相。与烧结态相比,复合材料硬度从255 HBW提高到281 HBW,抗弯强度从633 MPa提高到747 MPa。
Effect of aging treatment on microstructure and mechanical properties of 55 vol%SiC_(p)/2024 Al composite prepared by hot-isostatic pressing(HIP) process and using SiC particles with average size of 12 μm and 2024 aluminum alloy powders with average size of 19 μm, was studied. The results show that there is a compact structure and good bonding between SiC and aluminum alloy of the HIP processed SiC_(p)/2024 Al composite. The SiC_(p)/2024 Al composite exhibits “double-peak phenomenon” in the aging treatment process. In comparison, the maximum hardness of the aged SiC_(p)/2024 Al composite arrives earlier than that for the 2024 Al alloy, and the main strengthening phases in the matrix are θ″ phase and S″ phase. Compared with as-sintered composite, the hardness and bending strength of the aged composite are improved from 255 HBW to 281 HBW and from 633 MPa to 747 MPa, respectively.
作者
崔岩
董和谦
曹雷刚
杨越
蒙毅
Cui Yan;Dong Heqian;Cao Leigang;Yang Yue;Meng Yi(School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2022年第1期142-148,共7页
Heat Treatment of Metals
基金
国家重点研发计划(2017YFB0703102)
北京市优秀人才培养资助青年骨干个人项目(2016000020124G015)。
关键词
铝基复合材料
热等静压
时效
力学性能
aluminum matrix composite
hot-isostatic pressing
aging
mechanical properties
