热处理对Mg-6Al-0.5Mn-1.8Si-0.3Ca镁合金组织与性能的影响
Effects of Heat Treatment on Microstructure and Properties of Mg-6Al-0.5Mn-1.8Si-0.3Ca Alloy
张保丰1, 王利国2
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作者单位：(1. 黄河科技学院 工学院, 河南 郑州 450063; 2. 郑州大学 材料科学与工程学院, 河南 郑州 450002)
中文关键字：Mg-6Al-0.5Mn-1.8Si-0.3Ca镁合金； 热处理； 组织； 性能
英文关键字：Mg-6Al-0.5Mn-1.8Si-0.3Ca alloy; heat treatment; microstructure; properties
中文摘要：研究了热处理对Mg-6Al-0.5Mn-1.8Si-0.3Ca镁合金组织和显微硬度的影响。结果表明，经过固溶处理，β-Mg17Al12逐渐溶解到基体中，Mg2Si保持良好的热稳定性，合金的显微硬度明显提高，在固溶48 h时显微硬度较铸态时提高了约20%；固溶处理后再进行时效处理，沿晶界逐渐析出第二相，起到了晶界强化和弥散强化的作用。
英文摘要：The effects of heat treatment on the microstructure and properties of Mg-6Al-0.5Mn-1.8Si-0.3Ca alloy were studied. The results show that the β-Mg17Al12 phase has dissolved gradually into the matrix after solution heat treatment, but the Mg2Si phase has good thermostability. The microhardness is heightened by 20% after solution treatment for 48 h. After aging treatment, the second phase is precipitated gradually from the grain-boundary, the second phase plays a part in grain-boundary strengthing and dispersion strengthening.