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中文摘要：
通过特种粉末冶金法制备了一种用于Mg—Al系合金晶粒细化的Mg-Al-C中间合金，初步分析了Mg-Al—C中间合金对AZ31镁合金的细化机理。在该中间合金中，Al（C）固溶体分布在Mg颗粒的界面上。细化试验表明，该中间合金对AZ31（Mg-3Al—1Zn）合金有良好的细化作用。当加入3％该中间合金时，AZ31的晶粒尺寸由原来的850μm减小到260μm。
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