低压脉冲磁场对2024铝合金凝固组织的细化  

Refinement of 2024 Wrought Aluminum Alloy under Low Voltage Pulsed Magnetic Field

作　　者：袁秀妹[1] 左志立[1] 王图宏[1] 李运凡[1] 张磊[1] 

机构地区：[1]南昌航空大学航空制造工程学院

出　　处：《特种铸造及有色合金》2012年第12期1168-1171,共4页Special Casting & Nonferrous Alloys

基　　金：江西省教育厅2012年度科技计划资助项目(GJJ12432);南昌航空大学第七届"三小"科技创新基金项目(XTZ201207)

摘　　要：在2024铝合金的凝固过程中施加低压脉冲磁场处理,研究了低压脉冲磁场作用下2024铝合金凝固组织的变化,考察了浇注温度和放电电压对2024铝合金凝固组织中α-Al相形貌和尺寸的影响。结果表明,在低压脉冲磁场的作用下,2024铝合金凝固组织中的初生α-Al相和共晶组织均显著细化。浇注温度越接近液相线温度,初生α-Al的平均晶粒尺寸越小。随着放电电压的升高,初生α-Al的平均晶粒尺寸逐渐减小,当放电电压为250V时,平均晶粒尺寸达到最小值。Effects of the low voltage pulsed magnetic field （LVPMF） on sohdltmanon structure oI zu/4 wrought aluminum alloy were investigated, and the effects of pouring temperature and discharging volt- age on morphology and size of a-A1 phase in 2024 wrought aluminum alloy were observed. The results show that primary and eutectie phase in the alloy can be refined obviously by LVPMF. With the pouring temperature near to liquidus temperature increasingly, the average grain size is refined gradually. With the increase of discharging voltage, average grain size of primary a-A1 particles is decreased. With dis- charging voltage of 250 V, average grain size of primary a-A1 particles reaches minimum values.

关 键 词：低压脉冲磁场 2024铝合金 凝固组织 浇注温度 放电电压 细化 

分 类 号：TG146.21[一般工业技术—材料科学与工程]