Fe对AZ91镁合金热速处理组织和性能的影响  

Effect of Fe on the Microstructure and Properties of AZ91 Mg-Al Alloy

作　　者：刘增会 

机构地区：[1]莱芜市交通局,山东莱芜271100

出　　处：《山东冶金》2006年第3期64-65,共2页Shandong Metallurgy

摘　　要：利用熔体热速处理工艺(TRT)和普通熔炼工艺(CM),研究了Fe对AZ91镁合金热速处理组织、性能的影响。结果表明,采用将合金液过热至液相线以上200～300℃的热速处理工艺时,合金基体明显细化,改善了合金的力学性能。随着Fe含量的增加,热速处理后枝晶组织不但没有细化,大量显微缩松的出现影响了合金的力学性能。The effect of Fe on the microstructure and properties of AZ91 Mg-Al alloy subjected to thermal rate treatment was investigated by using TRT and CM process. The results showed that the grains of the Mg-Al alloy were fined and the properties improved remarkable by the thermal rate treatment with the melting heated to 200 - 300℃ above the liquid line. With the content of Fe increasing, the dendritic structure could not be fined and a great number of dispersed shrinkage formed, therefore aggravating the properties of AZ91 Mg-Al alloy.

关 键 词：AZ91 热速处理 组织 性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]