时效处理对55vol% SiC_(p)/6061Al复合材料力学性能的影响  

Effect of aging on mechanical properties of 55vol% SiC_(p)/6061Al composite

作　　者：曹雷刚 朱明雨 杨越 刘园 崔岩 Cao Leigang;Zhu Mingyu;Yang Yue;Liu Yuan;Cui Yan(School of Mechanical and Materials Engineering,North China University of Technology,Beijing 100144,China)

机构地区：[1]北方工业大学机械与材料工程学院,北京100144

出　　处：《金属热处理》2024年第12期72-77,共6页Heat Treatment of Metals

基　　金：国家重点研发计划(2022YFB3707402)。

摘　　要：采用热等静压法制备55vol%SiC_(p)/6061Al复合材料,研究了170、180和190℃条件下时效处理对复合材料力学性能的影响规律。结果表明,制备态55vol%SiC_(p)/6061Al复合材料的硬度和弯曲强度分别为182.4 HBW和440 MPa。复合材料表现出典型的双峰时效现象和动力学加速行为,当时效温度由170℃升高至190℃时,峰时效硬度对应时间由2.5 h缩短至0.3 h。时效处理可以显著提升复合材料的力学性能。最优时效温度为180℃,其第一个峰时效态(1 h)复合材料硬度最大,为236.3 HBW,增幅29.6%;第二个峰时效态(4.5 h)复合材料弯曲强度最大,为612 MPa,增幅39.1%。55vol%SiC_(p)/6061Al composite was prepared by using hot isostatic pressing method. The effect of aging treatment at 170, 180, and 190 ℃ on the mechanical properties of the composite was investigated. The results show that the hardness and bending strength of the as-prepared composite are 182.4 HBW and 440 MPa, respectively. The composite exhibits typical double-peak aging behavior and dynamic acceleration phenomenon. As the aging temperature increases from 170 ℃ to 190 ℃, the time corresponding to the first peak aging decreases from 2.5 h to 0.3 h. The aging treatment can significantly improve the mechanical properties of the composite and the optimal aging temperature is 180 ℃. Correspondingly, the hardness of the composite aged for 1 h is the highest, which is 236.3 HBW, with an increment of 29.6%, while the bending strength of the composite aged for 4.5 h is the highest, which is 612 MPa, with an increment of 39.1%.

关 键 词：SiC_(p)/6061Al复合材料 热等静压法 时效处理 硬度 弯曲强度 

分 类 号：TB333[一般工业技术—材料科学与工程]