Effect of Ultrasonic Field on Microscopic Defects in 7A09 Aluminum Alloy Melts

Tang Jingchuan; LI Xiaoqian; Dong Fang

doi:10.15980/j.tzzz.2016.02.022

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Effect of Ultrasonic Field on Microscopic Defects in 7A09 Aluminum Alloy Melts
Vol. 36, Issue 2, Pages: 196-199(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.02.022

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[1]唐靖川,李晓谦,董方.超声场对连续铸造7A09铝合金微观缺陷的影响[J].特种铸造及有色合金,2016,36(02):196-199.

Tang Jingchuan, LI Xiaoqian, Dong Fang. Effect of Ultrasonic Field on Microscopic Defects in 7A09 Aluminum Alloy Melts. [J]. Special Casting & Nonferrous Alloys 36(2):196-199(2016)
[1]唐靖川,李晓谦,董方.超声场对连续铸造7A09铝合金微观缺陷的影响[J].特种铸造及有色合金,2016,36(02):196-199. DOI： 10.15980/j.tzzz.2016.02.022.

Tang Jingchuan, LI Xiaoqian, Dong Fang. Effect of Ultrasonic Field on Microscopic Defects in 7A09 Aluminum Alloy Melts. [J]. Special Casting & Nonferrous Alloys 36(2):196-199(2016) DOI： 10.15980/j.tzzz.2016.02.022.

摘要

利用超声变幅杆在7A09铝合金连续铸造过程中进行超声处理

通过Olympus dsx500光学显微镜来观察施加超声处理和不施加超声处理的铝合金表面中缺陷的变化

由此来研究超声铸造对铝合金中微观缺陷的影响。结果表明

相对于未施加超声处理的铸锭

施加超声后铸锭的氧化夹杂缺陷减少

可观察到表面气孔、缩孔缺陷数量上有所增加（从2 912增大为3 436）

但是平均尺寸由10.0μm降为7.4μm、缺陷平均面积由0.40mm

降为0.36mm

。最后

对超声作用下氧化夹杂、双层膜、晶粒尺寸等对铝合金铸锭中微观缺陷的影响以及相关的作用机理进行了讨论。

Abstract

By utilizing Olympus dsx 500 optical microscope to observe the default on polished surface of7A09 aluminum alloy

effects of ultrasonic field on microstructure of 7A09 aluminum alloy were analyzed by introducing ultrasonic or not vibration-transfer tool rod.The results reveal that oxide inclusions are decreased dramatically with ultrasound treatment

and the number of defaults is increased from 2 912to3 436 while the average area of default is decreased from 0.40mm

to 0.36mm

with the average size of defaults decreased from 10.0μm to 7.4μm

compared with those of aluminum alloy without ultrasonic treatment.Finally

the mechanism of the effect of ultrasound on defects such as oxide inclusion

bifilm

grain size

was described.