CAJ | 학술논문

采用真空淬火炉制备出含ε-AlMn相的Mn-30Al中间合金和含γ_2-Al_8Mn_5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、γ_2-Al_8Mn_5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γ_2-Al_8Mn_5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320 μm,Mg-Zn合金晶粒尺寸由原来的320 μm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.
채용진공쉬화로제비출함ε-AlMn상적Mn-30Al중간합금화함γ_2-Al_8Mn_5상적Mn-30Al중간합금,관찰료량충중간합금적조직,병탐토ε-AlMn상、γ_2-Al_8Mn_5상、Mn화Al대미합금적정립세화효과.시험표명,상비첨가Mn、Al,함γ_2-Al_8Mn_5상적Mn-30Al중간합금대AZ31미합금존재일정적세화효과,함ε-AlMn상적Mn-30Al중간합금대AZ31미합금구유경호적세화효과.당함ε-AlMn상적Mn-30Al중간합금첨가량위0.4%시,AZ31미합금적정립척촌유원래적898μm감소지320 μm,Mg-Zn합금정립척촌유원래적320 μm감소지180μm.통과면착배도계산,ε-AlMn가이성위초생α-Mg정립적량호이질형핵핵심.
The master alloy Mn-30Al containing ε-AlMn phase and the Mn-30Al alloy containing γ_2-Al_8Mn_5 phase were prepared by vacuum quenching furnace, and microstructure of two kinds of master alloys were observed, meanwhile, effects of ε-AlMn phase, γ_2-Al_8Mn_5 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 γ_2-Al_8Mn_5 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 μrn and from 320 μm to 180 μm, respectively. ε-AlMn phase can be acted as desirable heterogeneous nucleithrough surface misfit calculation.