交流磁场对Mg-Zn-Zr-Gd合金组织及力学性能的影响  

Effects of AC Magnetic Field on Mechanical Properties and Microstructure of As-cast Mg-Zn-Zr-Gd Alloy

作　　者：毛训聪 陈乐平[1] 彭聪 Mao Xuncong;Chen Leping;Peng Cong(School of Aeronautical Manufacturing Engineering,Nanchang Hangkong University)

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》2023年第3期399-404,共6页Special Casting & Nonferrous Alloys

基　　金：江西省科技重点研发资助项目(20212BBE53018);江西省教育厅科技资助项目(DA202103161)。

摘　　要：研究了交流磁场处理工艺参数(交流电压、交流频率和模具温度)对铸态Mg-6Zn-0.5Zr-1Gd合金的凝固组织及力学性能的影响。结果表明,交流磁场可以细化Mg-6Zn-0.5Zr-1Gd合金的凝固组织。当交流电压在0~300 V内,随着交流电压增加,合金的晶粒尺寸逐渐减小。当交流频率在0~10 Hz内,随着交流频率增加,合金的晶粒尺寸先减小后增大。当模具温度在200~600℃内,随着模具温度增加,合金的晶粒尺寸也是先减小后增大。当交流电压为300 V,交流频率为5 Hz,模具温度为400℃时,合金的综合力学性能显著提高,此时合金的抗压强度为259.53 MPa,压缩率为20%,与未经过交流磁场处理的合金相比,分别提高了32.1%和11.7%。The effects of different AC magnetic field parameters,such as AC voltage,AC frequency and die temperature,on the solidification structure,mechanical properties and corrosion resistance of as-cast Mg-6Zn-0.5Zr-1Gd alloy were investigated.The results indicate that the AC magnetic field can refine the solidified microstructure of the Mg-6Zn-0.5Zr-1Gd alloy.When the AC voltage is increased from 0 to 300 V,the grain size of alloy is decreased gradually.When the AC frequency is increased from 0 to 10 Hz,the grain size of the alloy is decreased firstly and then increased.When the die temperature is increased from 200℃ to 600℃,the grain size of the alloy is decreased firstly and then increased.With the AC voltage of 300 V,the AC magnetic field of 5 Hz and the die temperature of 400℃,the comprehensive mechanical properties of the alloy are significantly enhanced,with the compressive strength of 259.53 MPa and the compression rate of 20%,which are increased by 32.1%and 11.7%,respectively,comparing to those of the alloy without alternatingmagnetic field treatment.

关 键 词：Mg-Zn-Zr-Gd合金 交流磁场 凝固组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG156.97[金属学及工艺—金属材料]