铝铜合金汽车轮毂的液态模锻成形与组织性能研究  

Microstructure & Properties of Aluminum Copper Alloy for Automotive Wheel Hub by Liquid Die Forging Forming

作　　者：姜峰 何波 刘文琪 JIANG Feng;HE Bo;LIU Wenqi(School of Automotive Engineering,Jilin Engineering Career Academy,Siping 136000,China;School of Materials Science and Engineering,Jilin University,Changchun 130012,China;China First Automobile Group Co.,Ltd.,Changchun 130013,China)

机构地区：[1]吉林工程职业学院汽车工程学院,吉林四平136000 [2]吉林大学材料科学与工程学院,吉林长春130012 [3]中国第一汽车集团有限公司,吉林长春130013

出　　处：《铸造技术》2018年第12期2798-2801,共4页Foundry Technology

基　　金：吉林省教育科学"十二五"规划课题(GH13581)资助

摘　　要：对液态模锻成形2A05铝合金轮毂不同部位的显微组织、硬度、拉伸性能进行了对比分析,并研究了浇注温度对铝合金轮毂底部边缘处组织和力学性能的影响。结果表明,铝合金轮毂上不同位置的显微硬度存在差异,轮毂底部边缘显微硬度最大,直壁与底部过渡处的显微硬度最小;底部斜角部分和底部边缘处的抗拉强度和伸长率均高于直壁处,且底部边缘处的强塑性最好,而轮毂直壁的强塑性最差;随着浇注温度的升高,轮毂铝合金的抗拉强度和伸长率呈先升高而后减小的趋势,在725℃浇铸时合金组织细小均匀,抗拉强度和伸长率取得最大值,分别为220 MPa和15.4%。Microstructure, hardness and tensile properties of different parts of 2A05 aluminum alloy automotive wheel hub by liquid die forging forming were compared and analyzed, and the effect of pouring temperature on the microstructure and mechanical properties of the bottom edge of hub was studied. The results show that the microhardness at different locations on the hub is different, the microhardness at the bottom edge of the hub is the largest, and the microhardness of the straight wall and the bottom transition is the smallest; The tensile strength and elongation at the bottom edge of the bottom angle and the bottom edge are higher than that in the straight wall, and the strength and plasticity at the bottom edge is the best, while the strength and plasticity of the straight wall of the hub is the worst. With the increase of pouring temperature, the tensile strength and elongation of the aluminum alloy first increased and then decreased. Microstructure of aluminum alloy is fine and uniform at the pouring temperature of 725 ℃, the maximum tensile strength and elongation are 220 MPa and 15.4%, respectively.

关 键 词：铝合金轮毂 模锻成形 不同部位 浇注温度 力学性能 

分 类 号：TG316[金属学及工艺—金属压力加工] TG113