通过微观分析及力学性能测试等方法,研究了添加稀土元素钪对 Al-10Mg 合金(ZL301合金)显微组织及力学性能的影响.结果表明,加入适量的钪元素后明显细化了 Al-10Mg 铸造合金的显微组织,主要是由于钪元素与Al形成颗粒状的稀土化合物Al3 Sc相,使合金中 Al3 Mg2相减少；经435℃×16 h 固溶处理后,Al3 Mg2相基本溶解,稀土化合物Al3 Sc相热稳定性较高并未溶解,合金抗拉强度进一步得到提高.当钪元素的添加含量为0．4％时,Al-10Mg合金综合性能最为优良.
Effects of scandium addition and solution treatment on microstructure and tensile properties of Al-10Mg alloy(ZL301 alloy)were investigated by microstructure analysis,mechanical properties testing.The re-sults show that the right amount addition of scandium element to Al-10Mg alloy result in grain refined because of new phase Al3 Sc forms after the right amount addition of scandium in the Al-10Mg alloys,The size and a-mount of Al3Mg2 phase are decreased.After solid solution treatment(435 ℃×16 h),the Al3Sc phase dissolves and the rare earth phase with heat stability remains leading to further improving of the mechanical properties of the alloys.When the content of Sc is 0.4%,the Al-10Mg alloy has good comprehensive properties.
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