Y-X中间合金对AZ61镁合金组织性能的影响

Influence of Y-X Interalloy on Structure and Properties of AZ61 Magnesium Alloy

在熔炼AZ61铸锭过程中以中间合金的形式加入Y-X，采用OM、SEM和EDS等分析合金微观组织，研究了0％～8％（质量分数）范围内不同含量的Y．X对合金显微组织、力学性能的影响。结果表明：适量Y-x中间合金处理后的合金具有细小均匀的铸态组织，晶粒尺寸维持在30μm左右。Y-X含量从0％变化到8％过程中，合金室温强度在Y-X为6％以下时增加，在6．0～8．0％范围内降低，而材料的高温强度则一直呈现升高趋势。

Microstructure of AZ61 magnesium alloy is studied with OM, SEM and EDS, the effects of rare earth Y-X interalloy on microscopic structure and mechanical properties of the alloy are studied when Y-X is added into melt with the range of 0%-8.0% （mass fraction, similarly hereinafter）. The results indicate that proper rare earth Y-X interalloy has the strong refinement on cast microstructure, the grain size maintains 30 micron or so. When Y-X content changes from 0% to 8%, room temperature tensile strength of the alloy is increased below the range of 6.0% and decreased in the range of 6.0% to 8.0%, while its high temperature strength is improved in the range of 0% to 8% always.