低压脉冲磁场对ZM5-3%Ca阻燃镁合金凝固组织的影响  

Effect of Low-voltage Pulsed Magnetic Field on Solidified Structure of Ignition-proof Magnesium Alloy ZM5-3%Ca

作　　者：周全[1] 涂序荣[1] 陈乐平[1] 

机构地区：[1]南昌航空大学航空制造工程学院,江西南昌330063

出　　处：《热加工工艺》2010年第5期27-30,共4页Hot Working Technology

基　　金：江西省教育厅资助项目(GJJ08208);江西省自然科学基金资助项目(2008GQC0035)

摘　　要：采用低压脉冲磁场处理ZM5-3%Ca阻燃镁合金的凝固过程,考察了脉冲电压和脉冲频率对合金凝固组织的影响。研究结果表明:低压脉冲磁场可以显著细化ZM5-3%Ca合金的凝固组织;随着脉冲电压或脉冲频率的增加,合金的晶粒尺寸逐渐减小,初生相逐渐退化,由发达的树枝晶转变成细小的等轴晶或蔷薇状晶体。The influences of different pulse voltage and pulse frequency on solidified structures of ignition-proof magnesium alloy ZM5-3%Ca were investigated under low-voltage pulsed magnetic field. The results show that the solidified structure of the alloy can be greatly refined by low-voltage pulsed magnetic field. With the increase of pulse voltage or pulse frequency, the grain size of the alloy decreases, the dendrite degrades gradually and the primary phase changes from well-developed dendrite to equiaxed grain or rose-shaped crystal.

关 键 词：低压脉冲磁场 阻燃镁合金 凝固组织 

分 类 号：TG146[一般工业技术—材料科学与工程]