Effect of Ultrasonic Treatment on Solidification Structure and Degassing of 7005 Aluminum Alloys

Jia Zheng; Yu Bing; Le Qichi; Zhou Ce; Lu Baokun; Min Aiwu; Hu Wenxin

doi:10.15980/j.tzzz.2022.07.001

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Effect of Ultrasonic Treatment on Solidification Structure and Degassing of 7005 Aluminum Alloys
Vol. 42, Issue 7, Pages: 793-796(2022)
Published： 2022 ，
DOI： 10.15980/j.tzzz.2022.07.001

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Jia Zheng, Yu Bing, Le Qichi, et al. Effect of Ultrasonic Treatment on Solidification Structure and Degassing of 7005 Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys 42(7):793-796(2022)
DOI：

Jia Zheng, Yu Bing, Le Qichi, et al. Effect of Ultrasonic Treatment on Solidification Structure and Degassing of 7005 Aluminum Alloys. [J]. Special Casting & Nonferrous Alloys 42(7):793-796(2022) DOI： 10.15980/j.tzzz.2022.07.001.

摘要

对半连续水冷DC铸造7005铝合金的凝固组织及除气进行了研究。结果表明，超声处理对锭坯的凝固组织均有一定的细化作用，边部晶粒尺寸从未处理的200μm降至100μm; 1/2半径部位从未处理的120μm降至100μm;中心部位晶粒尺寸从100μm降至80μm

即边部凝固组织细化效果最好；超声杆的插入深度对锭坯的细化效果也有重要的影响；超声处理后的DC铸造铝合金中，氢含量降低了26.8%。综上，超声波对DC铸造铝合金具有良好的细化和除气作用。

Abstract

Effects of ultrasonic treatment on solidification structure and degassing of DC casting 7005 aluminum alloys were investigated. The results reveal that ultrasonic treatment can refine the solidification structure. The size of grain at the edge is decreased from 200 μm to 100 μm

while that of R/2 grain is decreased from 120 μm to 100 μm

and that of center grain is decreased from 100 μm to 80 μm

indicating the desirable refinement of the edge. Inserting depth of ultrasonic probe has important effect on grain refinement

and the hydrogen content in DC casting is decreased by 26.8% after ultrasonic treatment

showing that ultrasonic has desirable refinement and degassing effect on DC casting aluminum alloy.