摘要
颗粒增强铝基复合材料已经成为新型轻量化制动耐磨部件的重要备选材料。本工作采用热压法高质量制备了Al-Cu-Mg/SiC p复合材料,重点通过热处理前后复合材料的显微组织以及磨损后形貌和相组成等的比较研究,分析了复合材料的性能,尤其是摩擦磨损特性的变化机制,并解释了整体材料磨损过程的可能转变及影响。结果表明,经过适当的T6热处理,复合材料的抗拉强度由268 MPa增加至387 MPa,提高约44%,延伸率由6.0%变化至5.6%,基本保持稳定,相对磨损率则由0.153 mm^ 3·(N·km)^-1减小至0.095 mm ^3·(N·km)^-1,降低约38%。
Particles reinforced aluminum matrix composite has been the main candidate material for the braking and wear-resistant components.In this work,Al-Cu-Mg/SiC p composites were well produced by hot pressing method.By means of comparative study on the microstructure of composites with and without heat treatment,as well as the morphology and phase composition of wore surfaces,the variation of the properties,especially the friction and wear characteristics,were analyzed.Further,the possible alterations during the wearing process and its effects were explained.Routed by proper T6 heat treatment,the properties of composites were significantly optimized.The tensile strength was raised from 268 MPa to 387 MPa,which is about 44%improvement,the elongation was changed from 6.0%to 5.6%,which is stable roughly,and the specific wear rate was reduced from 0.153 mm ^3·(N·km)^-1 to 0.095 mm ^3·(N·km)^-1,which is about 38%reduction.
作者
张洋
张海燕
陈蕴博
王大鹏
陈林
刘晓萍
ZHANG Yang;ZHANG Haiyan;CHEN Yunbo;WANG Dapeng;CHEN Lin;LIU Xiaoping(State Key Laboratory for Advanced Forming Technology and Equipment,China Academy of Machinery Science and Technology Group Co.,ltd.,Beijing 100083,China;Beijing National Innovation Institute of Lightweight Ltd.,Beijing 100083,China;Shandong Longji Machinery Co.,Ltd.,Yantai 265700,China;School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2020年第S01期356-360,共5页
Materials Reports
基金
山东省泰山产业领军人才(2017)。
关键词
铝基复合材料
析出强化
摩擦磨损特性
氧化磨损
aluminum matrix composites
precipitation hardening
friction and wear characteristic
oxidation wear
