基于消失模铸造的AZ91D镁合金振动改性研究  

Effects of Mechanical Vibration on Modification of AZ91D Magnesium Alloy in Lost Foam Casting

作　　者：李继强[1] 樊自田[1] 田学峰[1] 董选普[1] 王元庆[1] 

机构地区：[1]华中科技大学

出　　处：《特种铸造及有色合金》2006年第9期581-583,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50275058)

摘　　要：研究了机械振动处理技术对AZ91D镁合金在消失模铸造条件下组织形貌以及力学性能的影响,并探讨了振动细化机理。结果表明:机械振动能显著地细化AZ91D合金的铸态组织,改善其力学性能,提高其抗拉强度,当激振力为1.5kN时,合金抗拉强度最高,而当激振力进一步增加时,由于组织中出现微观缩松,强度有所降低。Effects of mechanical vibration on microstructure and mechanical properties of AZ91D magnesium alloy in lost foam casting have been investigated, and its vibration refinement mechanism is understood. The results show that mechanical vibration can significantly refine the as-cast microstructure of the AZ91D magnesium alloy to improve the mechanical properties. The maximum tensile strength can be obtained with the vibrated force of 1.5 kN. With the further increase of the vibrated force, the tensile strength of the Mg alloy can be somewhat decreased arising from the formation of micro-porosity in the microstructure.

关 键 词：消失模铸造 镁合金 机械振动 组织细化 

分 类 号：TG249.5[机械工程—精密仪器及机械]