Effects of Ultrasonic Treatment on Solidification Structure of Al-6.2Cu-0.36Mn Alloy for Aerospace Industry

Zhang Li; Li Xiaoqian; Guan Shaokang; Jiang Ripeng; Li Ruiqing; Huang Kai; Xie Jingpei

doi:10.15980/j.tzzz.2020.11.005

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Effects of Ultrasonic Treatment on Solidification Structure of Al-6.2Cu-0.36Mn Alloy for Aerospace Industry
Vol. 40, Issue 11, Pages: 1199-1203(2020)
Published： 2020 ，
DOI： 10.15980/j.tzzz.2020.11.005

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[1]张莉,李晓谦,关绍康,蒋日鹏,李瑞卿,黄凯,谢敬佩.超声处理对航空航天用Al-6.2Cu-0.36Mn合金组织的影响[J].特种铸造及有色合金,2020,40(11):1199-1203.

Zhang Li, Li Xiaoqian, Guan Shaokang, et al. Effects of Ultrasonic Treatment on Solidification Structure of Al-6.2Cu-0.36Mn Alloy for Aerospace Industry. [J]. Special Casting & Nonferrous Alloys 40(11):1199-1203(2020)
[1]张莉,李晓谦,关绍康,蒋日鹏,李瑞卿,黄凯,谢敬佩.超声处理对航空航天用Al-6.2Cu-0.36Mn合金组织的影响[J].特种铸造及有色合金,2020,40(11):1199-1203. DOI： 10.15980/j.tzzz.2020.11.005.

Zhang Li, Li Xiaoqian, Guan Shaokang, et al. Effects of Ultrasonic Treatment on Solidification Structure of Al-6.2Cu-0.36Mn Alloy for Aerospace Industry. [J]. Special Casting & Nonferrous Alloys 40(11):1199-1203(2020) DOI： 10.15980/j.tzzz.2020.11.005.

摘要

在710℃对Al-6.2Cu-0.36Mn合金熔体施加超声处理

研究了不同时长超声处理对Al-6.2Cu-0.36Mn合金中氢含量、晶粒尺寸和共晶组织形貌及分布的综合影响。结果表明

随着超声处理时间增加

铸锭凝固组织中的气孔减少

除气率达53.8%

晶粒明显细化

细化率达73.6%

团聚的共晶组织转变为断续的条状。施加超声产生的空化和声流效应能够提高形核率

促进溶质均匀分布

是Al-6.2Cu-0.36Mn合金铸锭凝固组织得到改善的主要原因。

Abstract

Ultrasonic treatment of Al-6.2 Cu-0.36 Mn alloy melt at 710℃ was carried out. The comprehensive effects of ultrasonic treatment with different durations on hydrogen content

grain size

morphology and distribution of eutectic structure in Al-6.2 Cu-0.36 Mn alloy were investigated. The results show that with the increase of ultrasonic treatment time

the porosity in the solidified microstructure of the ingot is reduced with the degassing efficiency up to 53.8%

meanwhile

the grain is obviously refined and the refinement rate is up to 73.6%. In addition

the agglomerated eutectic microstructure is transformed into discontinuous strips. The effect of cavitation and acoustic flow caused by ultrasonic vibration can raise the nucleation rate and promote the uniform distribution of solute

which is the main reason for the improvement of solidification structure of the Al-6.2 Cu-0.36 Mn alloy ingot.