中南大学学报（自然科学版）2011，Vol.42Issue(7)：1918-1922,5.
超声铸造对AZ31镁合金铸锭及热轧板材组织与性能的影响
Effects of ultrasonic vibration on microstructure and properties of as-cast and hot rolled AZ31 magnesium alloy
摘要
Abstract
The ultrasonic vibration was introduced into the solidification of the AZ31 magnesium alloy. The results show that the average grain size of the experimental alloy ingots is about 140 urn, which is smaller of AZ31 alloy with ordinary casting process. Meanwhile, the intermetallics of experimental alloy distribute more uniform and disperse. Such structure is attribute to enhancing ingot's mechanical properties and benefit to the sequential hot rolling. The grain size (5-30 μm) of hot rolled plate is produced by casting with ultrasonic vibration and sequential hot rolling is smaller than that (40-60 μm) of plate prepared by ordinary casting process. The mechanical properties of AZ31 magnesium alloy plate produced by ultrasonic vibration casting and sequential hot rolling are greatly improved due to the microstructure modification. The tensile strength increases by 18%, and the elongation is maintained. Ultrasonic vibration casting process enhances the mechanical properties and refines microstructure of AZ31 magnesium alloy and improves its deforraability.关键词
超声铸造/AZ31镁合金/显微组织/力学性能Key words
ultrasonic vibration/A231 magnesium alloy/microstructure/mechanical properties分类
矿业与冶金引用本文复制引用
余琨,薛新颖,毛大恒,李建平,胡亚男,李少君..超声铸造对AZ31镁合金铸锭及热轧板材组织与性能的影响[J].中南大学学报（自然科学版）,2011,42(7):1918-1922,5.基金项目
国家重点基础研究发展计划(“973”计划)(2007CB613706) （“973”计划）
