旋转磁场对铸造Al-Si合金凝固组织及硬度的影响  

Effect of Rotating Magnetic Field on Solidification Microstructure and Hardness of Casting Al-Si Alloy

作　　者：张雷[1] 康凯娇 石德全[2] ZHANG Lei;KANG Kai-jiao;SHI De-quan(Melting and Casting Plant,Northeast Light Alloy Co.,Ltd,Harbin 150060,Heilongjiang,China;School of Materials Science and Technology,Harbin University of Science and Technology,Harbin 150040,Heilongjiang,China)

机构地区：[1]东北轻合金有限责任公司熔铸厂,黑龙江哈尔滨150060 [2]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《铸造》2021年第12期1385-1390,共6页Foundry

摘　　要：以Al-7Si-0.45Mg合金为研究对象,通过控制变量法分别研究了旋转磁场激励电压、磁场频率、磁场换向时间间隔对亚共晶Al-Si合金凝固组织和硬度的影响。结果表明:当旋转磁场激磁电压为90 V、旋转磁场频率为170 Hz、旋转磁场换向时间间隔为15 s时,Al-7Si-0.45Mg合金组织更加均匀,晶粒更加细小,合金的力学性能更好。Taking Al-7Si-0.45Mg alloy as the research object,the effects of the excitation voltage,frequency and commutation time interval of rotating magnetic field on the solidification microstructure of hypoeutectic Al-Si alloy were studied by the variable controlling method.The results show that when the exciting voltage was 90 V,the frequency was 170 Hz,and the commutation time interval was 15 s,the microstructure of the Al-7Si-0.45Mg alloy was more uniform,the grains were finer,and the mechanical properties of the alloy were better.

关 键 词：旋转磁场 铸造AL-SI合金 凝固组织 硬度 

分 类 号：TG244[金属学及工艺—铸造]