研究Mg-9Sr中间合金及其处理工艺对AZ31镁合金铸态组织的影响.结果表明:在AZ31镁合金中加入不同状态的Mg-9Sr中间合金(常规铸态、快速凝固态、同溶态和轧制态)对?AZ31镁合金均有很好的晶粒细化效果,其中轧制态Mg-9Sr中间合金的细化效果最好,其次依次为固溶态、常规铸态和快速凝态Mg-9Sr中间合金.在Sr加入量0.1%和熔体保温时间80 min条件下,轧制态Mg-9Sr中间合金可使AZ31镁合金获得62μm的最小平均晶粒尺寸.
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