汽车用AlSi7Mg铸造铝合金的组织和性能研究  

Study on Microstructure and Properties of AlSi7Mg Cast Aluminum Alloy for Automobile

作　　者：吴亮[1] 柯华波 周红云[3] 肖红军[4] WU Liang;KE Hua-bo;ZHOU Hong-yun;XIAO Hong-jun(Guangdong Polytechnic of Industry and Commerce,Training Center,Guangzhou 510510,Guangdong,China;GAC AIAN New Energy Automobile Co.,Ltd.,Guangzhou 511400,Guangdong,China;Guangdong Polytechnic of Industry and Commerce,Mechanical and Electrical Engineering Institute,Guangzhou 510510,Guangdong,China;Foshan University,School of Mechatronic Engineering and Automation,Guangdong,Foshan 528225,Guangdong,China)

机构地区：[1]广东工贸职业技术学院实训中心,广东广州510510 [2]广汽埃安新能源汽车有限公司,广东广州511400 [3]广东工贸职业技术学院机电工程学院,广东广州510510 [4]佛山科学技术学院机电工程与自动化学院,广东佛山528225

出　　处：《铸造》2022年第12期1525-1528,共4页Foundry

基　　金：广东省教育科研“十三五”规划课题《“互联网+”下创新创业教育嵌入高职产品设计开发课程路径研究》(2018GXJK304)。

摘　　要：研究了汽车转向节部件AlSi7Mg铝合金的组织和性能,主要通过不同保温温度和时间的固溶热处理制度,研究了固溶热处理工艺对AlSi7Mg铸造铝合金的组织和力学性能的影响规律。试验结果表明:538℃和8 h保温后,合金固溶更加充分,热处理后合金的共晶组织球化程度较高,固溶温度对共晶组织形态的影响要比保温时间的影响大得多,AlSi7Mg合金在538℃/8 h+淬火+160℃/6 h热处理状态下,材料的综合性能达到了较高的水平,若材料的韧性满足产品要求,可以降低固溶热处理的保温时间,以提高热处理效率。The microstructure and properties of AlSi7Mg aluminum alloy for automobile steering knuckle parts were studied. Mainly through the solution heat treatment system with different holding temperatures and times,the influences of the solution heat treatment process on the microstructure and mechanical properties of the AlSi7Mg cast aluminum alloy were studied. The test results showed that the solid solution of the alloy was more adequate after holding at 538 ℃ for 8h, and the spheroidization degree of eutectic structure of the alloy was relatively high after heat treatment. The effect of the solution temperature on eutectic microstructure was much greater than that of the holding time. Under the condition of 538 ℃/8 h + quenching + 160 ℃/6 h heat treatment, the comprehensive properties of the AlSi7Mg alloy have reached a high level. If the toughness of the material meets the product requirements, the holding time of the solution heat treatment can be reduced and the heat treatment efficiency can be improved.

关 键 词：AlSi7Mg铝合金 固溶热处理 微观组织 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG166.3[金属学及工艺—金属材料]