Mg/Si质量比对Al-Mg-Si系合金组织性能的影响  

Effect of Mg/Si mass ratio on microstructure and properties of Al-Mg-Si aluminum alloy

作　　者：张建新[1,2] 邵水军[3] 高爱华[3] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000 [2]河南理工大学文法学院,河南焦作454000 [3]河南理工大学机械与动力工程学院,河南焦作454000

出　　处：《轻金属》2012年第9期56-59,共4页Light Metals

基　　金：河南省教育厅计划项目(编号:2008B430010);河南理工大学金属材料发展基金项目(编号:506096)

摘　　要：以Al-Mg-Si系合金为研究对象,分析了Mg/Si质量比对合金显微组织、腐蚀性能及电导率的影响。结果表明:Mg/Si质量比为1.5时试样铸态晶粒均匀细小,其强度和塑性达到最佳配合,二者比值超过1.73后,抗拉强度急剧降低。Mg/Si质量比在1.5～1.7范围内合金腐蚀性能相对稳定,Mg/Si质量比大于1.73或小于1.5后材料的耐蚀性能下降显著。过剩Mg元素对Al-Mg-Si系合金的电导率有较大影响,Mg/Si质量比为1.65时材料的导电性能较高。With experimental data of AI - Mg - Si aluminum alloy,the effects of Mg/Si mass ratio on microscopic structure, corrosive property and electrical conductivity of the alloy were studied. The results indicate that the as - cast structure of the samples are fine and homogeneous when Mg/Si mass ratio is 1.5, and its strength and ductility match optimum, the tensile strength decreases sharply when the ratio is more than 1.73. The corrosion resistance of the alloy is stable when Mg/Si mass ratio is in the range of 1.5 to 1.7,its corrosion resistance degrades rapidly when the ratio is over 1.73 or less than 1. 5. Surplus Mg has great effect on the conductivity of AI - Mg - Si alloy,its conductive property is better when Mg/Si mass ratio is 1.65 or so.

关 键 词：Mg Si比 铝合金 显微组织 性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]