电磁搅拌对5356铝合金显微组织的影响  

The Effects of the Electromagnetic Stirring on the Microstructure of 5356-Al Alloy

作　　者：邢清源[1] 孟令刚[2] 杨守杰[1] 杨斌[1] 张兴国[2] XING Qing-yuan MENG Ling-gang YANG Shou-jie YANG Bin ZHANG Xing-guo(Beijing Institute of Aeronautical Materials, Beijing 10095, China School of Material Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China)

机构地区：[1]中航工业北京航空材料研究院,北京10095 [2]大连理工大学材料科学与工程学院,辽宁大连116024

出　　处：《铸造》2017年第2期112-117,共6页Foundry

基　　金：国家自然科学基金(51375071);中央高校基本科研业务费专项资金(DOT14RC(3)134)

摘　　要：采用电磁搅拌技术制备5356铝合金,以期可以改善该合金的内部质量,消除颗粒第二相局部偏聚的现象。通过对电磁搅拌磁场类型、搅拌温度区间和励磁电流大小三个方面初步的探究,试验证明:在螺旋磁场(励磁电流25 A,频率10 Hz)条件下,搅拌至完全凝固状态,该合金的显微组织最佳,呈现第二相分布十分均匀的破碎枝晶状态,平均晶粒尺寸最小,可达147.9μm,相比于无电磁搅拌状态,该指标降低了57.7%。In order to improve the internal quality of 5356 alloy and eliminate the segregation of the second phase, this research adopts the electromagnetic stirring technology to produce this alloy. Through the study of three aspects, the stirring type of magnetic field, the stirring temperature range and exciting current, the result proves that, under the condition of spiral magnetic field （25A ＆ 10 Hz）, and stirring until solidified completely, the alloy has got an optimal microstructure and shows broken dendrite crystals with uniform distribution of the second phases, and the average of the grain size is smallest at the same time, which is down to 147.9 μm. Comparing to the condition of non-electromagnetic stirring, this index has decreased 57.7%.

关 键 词：5356铝合金 电磁搅拌 螺旋磁场 励磁电流 

分 类 号：TG146.21[一般工业技术—材料科学与工程]