摘要
通过在2009Al合金中引入不同质量分数(0、1%、3%、5%)的SiC颗粒,采用热等静压工艺制备了SiC_(p)/2009Al复合材料,随后进行了热挤压和固溶时效处理,研究了工艺过程对该复合材料组织与性能的影响。结果表明,采用热等静压工艺能够制备出晶粒均匀且SiC分散均匀的复合材料,SiC颗粒与Al基体界面结合良好;经挤压工艺后,复合材料的微观组织明显改变,增强体SiC颗粒破碎并细化,当SiC含量较低(≤3%)时SiC颗粒沿挤压流均匀分布在基体中,SiC较高(>3%)时,SiC颗粒存在轻微的团聚现象。经固溶时效处理后,基体晶粒尺寸的均匀性提高,析出的第二相细小均匀弥散分布在基体中。通过对SiC_(p)/2009Al复合材料进行热挤压及固溶时效处理可以得到较优的综合力学性能。当引入质量分数为3%的SiC时,复合材料的力学性能更佳,其抗拉强度为492.7 MPa,屈服强度为400.9 MPa,断后伸长率为12.7%,硬度为131 HBW,在室温下兼具较好的耐磨性能。
SiC_(p)/2009Al composites were prepared by introducing SiC particles with different mass fractions(0,1%,3%and 5%)into 2009Al alloy by hot isostatic pressing process,followed by hot extrusion,solution and aging treatment,and the effects of the process on microstructure and properties of the composites were investigated.The results show that the composites with uniform grain and uniform dispersion of SiC can be prepared by the hot isostatic pressing process,and the SiC particles are well bonded with the interface of Al matrix.the microstructure of the composites is obviously changed by the extrusion process,the reinforcing SiC particles are broken and refined and homogeneously distributed along the extruded flow in the matrix when the content of SiC is lower(≤3%),while when the SiC content is higher(>3%),there is a slight agglomeration of SiC particles.After solution and aging treatment,the uniformity of matrix grain size is improved,and the precipitated second phase is fine and uniformly dispersed in the matrix.By hot extrusion,solution and aging treatment,the SiC_(p)/2009Al composites can obtain superior comprehensive mechanical properties.When 3%SiC is introduced,the preferable mechanical properties of the composites are obtained with tensile strength of 492.7 MPa,yield strength of 400.9 MPa,elongation after fracture of 12.7%,hardness of 131 HBW,and a good wear resistance at room temperature.
作者
肖治同
王方明
颜泽华
张勇
曹振
呼怀刚
李炯利
王旭东
Xiao Zhitong;Wang Fangming;Yan Zehua;Zhang Yong;Cao Zhen;Hu Huaigang;Li Jiongli;Wang Xudong(Beijing Institute of Graphene Technology,Beijing 100094,China;Beijing Petroleum Machinery Co.,Ltd.,Beijing 102206,China;Harbin University of Science and Technology Rongcheng Campus,Weihai Shandong 264300,China;AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;National Engineering Research Center for Oil&Gas Drilling and Completion Technology,Beijing 102206,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2024年第6期190-197,共8页
Heat Treatment of Metals
基金
油气钻完井技术国家工程研究中心科学研究基金(NERCDCT202323)。
