摘要
采用纳米颗粒强化、热压强化等多种方式相结合的复合强化法,以Al-Si系合金为基体、纳米级CuO颗粒为原位反应剂,外加微米SiC颗粒制备多尺度混杂颗粒增强铝基复合材料,并对其组织形貌进行表征,研究CuO质量分数对其硬度和耐磨性的影响.结果表明:所得复合材料的组织为共晶组织(α+Si)+SiC颗粒+AlCu3颗粒,且随着CuO质量分数的增加,共晶组织的α晶粒和点状Si变得更加细小.当CuO质量分数为3.0%,即试样配方为3.0%CuO+15.0%SiC+82.0%Al-Si时,复合材料的硬度最大,为88.8 HB,比基体硬度(51.8 HB)提高了71.4%;同时,复合材料的磨损量最低,为0.0030 g,且耐磨性最好,相对耐磨性为2.93%,是基体耐磨性的2.93倍.
The reinforced aluminum matrix composites was prepared by using the composite strengthening method combining various methods such as nanoparticle strengthening and hot pressing strengthening,with Al-Si alloy as the matrix,nano-scale CuO particles as the in-situ reactant,and micron SiC particles plus multi-scale hybrid particles,the structure and morphology of the composites were characterized,and the effect of the in-situ reactant CuO mass fraction on its hardness and wear resistance was studied.The results showed that the structure of the obtained composites was eutectic structure(α+Si)+SiC particles+AlCu3 particles,and with the increase of the mass fraction of CuO,theαgrains and point Si of the eutectic structure became finer.When the CuO mass fraction was 3.0%,that was,the sample formula was 3.0%CuO+15.0%SiC+82.0%Al-Si,the composites had the largest hardness of 88.8 HB,which was 71.4%higher than the matrix hardness(51.8 HB).At the same time,the composites had the lowest wear amount of 0.0030 g,and the best wear resistance,the relative wear resistance was 2.93%,which was 2.93 times that of the matrix.
作者
高红霞
王蒙
GAO Hongxia;WANG Meng(College of Mechanical and Electrical Engineering,Zhengzhou University of Light Industry,Zhengzhou 450002,China)
出处
《轻工学报》
CAS
2020年第5期48-54,共7页
Journal of Light Industry
基金
河南省科技攻关项目(162102210064)。
关键词
原位反应剂
复合强化法
混杂颗粒增强铝基复合材料
耐磨性
in-situ reactant
composite strengthening method
hybrid particle reinforced aluminum matrix composites
wear resistance
