摘要
采用真空淬火炉制备出含ε-AlMn相的Mn-30Al中间合金和含γ2-Al8Mn5相的Mn-30Al中间合金,观察了两种中间合金的组织,并探讨ε-AlMn相、γ2-Al8Mn5相、Mn和Al对镁合金的晶粒细化效果。试验表明,相比添加Mn、Al,含γ2-Al8Mn5相的Mn-30Al中间合金对AZ31镁合金存在一定的细化效果,含ε-AlMn相的Mn-30Al中间合金对AZ31镁合金具有更好的细化效果。当含ε-AlMn相的Mn-30Al中间合金添加量为0.4%时,AZ31镁合金的晶粒尺寸由原来的898μm减小至320μm,Mg-Zn合金晶粒尺寸由原来的320μm减小至180μm。通过面错配度计算,ε-AlMn可以成为初生α-Mg晶粒的良好异质形核核心。
The master alloy Mn-30Al containing ε-AlMn phase and the Mn-30Al alloy containing γ2-Al8Mn5 phase were prepared by vacuum quenching furnace,and microstructure of two kinds of master alloys were observed,meanwhile,effects of ε-AlMn phase,γ2-Al8Mn5 phase,Mn and Al on grain refinement of magnesium alloy were analyzed.The results reveal that refining effects of Mn-30Al master alloy containing ε-AlMn phase on the magnesium alloy are obviously superior to Mn-30Al alloy containing γ2-Al8Mn5 phase,Mn,Al.With 0.4% Mn-30Al master alloy containing ε-AlMn phase,grain size of AZ31 magnesium alloy and Mg-Zn alloy are decreased from 898 μm to 320 μm and from 320 μm to 180 μm,respectively.ε-AlMn phase can be acted as desirable heterogeneous nuclei through surface misfit calculation.
出处
《特种铸造及有色合金》
CAS
CSCD
北大核心
2010年第1期81-84,共4页
Special Casting & Nonferrous Alloys
基金
"十一五"国家科技支撑计划项目(2006BAE04B03)
国家自然科学基金资助项目(50904035)
广东省教育部产学研结合项目(2009B090300148)
关键词
镁合金
ε-AlMn相
晶粒细化
喷铸
Magnesium Alloy,ε-AlMn Phase,Grain Refinement,Spraying Deposition
