Si含量对汽车发动机铸造铝合金性能的影响  

Effect of Si Content on Mechanical Properties of Casting Aluminum Alloy for Automobile Engine

作　　者：郭兆松[1] 刘静[1,2] 谢剑[1] 

机构地区：[1]南京交通职业技术学院,江苏南京211188 [2]江苏大学,江苏镇江212013

出　　处：《铸造技术》2017年第12期2829-2831,共3页Foundry Technology

摘　　要：制备了Si含量分别为0.2%、0.4%、0.6%、0.8%和1.0%的汽车发动机用6061铝合金,研究了时效态的金相组织,并对其室温拉伸性能和维氏硬度进行了测试。结果表明,拉伸强度呈现随Si含量增加先升高后降低的趋势,屈服强度和维氏硬度随着Si含量的增加而逐渐升高,伸长率随着Si含量的增加而逐渐下降。当Si含量为0.6%时,6061铝合金具有最优的力学性能。The 6061 aluminum alloys for the automobile engine with different Si contents 0.2%, 0.4%, 0.6%, 0.8% and1.0% were prepared, the microstructure, tensile strength and Vickers hardness of aging materials at room temperature were investigated. The results show that the tensile strength presents a tendency to decrease with the increase of Si content, the yield strength and Vickers hardness increase with the increasing of Si content, the elongation decreases with the increase of Si content. When the Si content is 0.6 %, 6061 aluminum alloy has the optimal mechanical properties.

关 键 词：6061铝合金 SI含量 组织 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG292[金属学及工艺—金属材料]