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2222材料工程  2021, Vol. 49 Issue (7): 133-140    DOI: 10.11868/j.issn.1001-4381.2020.000543
  研究论文 本期目录 | 过刊浏览 | 高级检索 |
基于非线性超声空化效应的铝合金热浸镀工艺
陈海燕1, 曾越1, 李艺2, 吴建新1, 许世锬1, 邹燕成3
1. 广东工业大学 材料与能源学院, 广州 510006;
2. 谢菲尔德大学 数学与统计学院, 英国 谢菲尔德 S3 7RH;
3. 惠州市惠阳广杰五金制品有限公司, 广东 惠州 516221
Hot dip process of aluminum alloy based on nonlinear ultrasonic cavitation effect
CHEN Hai-yan1, ZENG Yue1, LI Yi2, WU Jian-xin1, XU Shi-tan1, ZOU Yan-cheng3
1. School of Materials and Energy, Guangdong University of Technology, Guangzhou 510006, China;
2. School of Mathematics and Statistics, University of Sheffield, Sheffield S3 7RH, UK;
3. Guangjie Metal Co., Ltd. Huiyang, Huizhou 516221, Guangdong, China
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摘要 在390℃热浸镀锌过程中施加20 kHz的超声波,采用数值分析法求解Keller-Miksis和Mettin方程,描述ZnAl8熔池中0~800 W超声空泡的生长规律和空化效应,研究超声功率对镀层ZnAl8合金组织的影响,以及对1050铝合金表面氧化膜的作用。结果表明:空化效应与超声功率呈现出非线性的变化规律,当超声功率为0~500 W时,空化以稳态效应为主,空化能量不足以消除镀层合金初生相的粗大枝晶组织,也不能消除铝合金氧化膜。当功率为600~800 W时,空化以瞬态崩溃破裂的方式释放能量,其中700~800 W的空化压强和温度效应可以将铝合金表面氧化膜击碎和熔蚀,为镀层中元素扩散提供了铺展润湿和物质传输的通道,镀层ZnAl8合金与1050铝合金基体之间形成了良好的冶金结合,镀层合金呈细小均匀的蔷薇组织。
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陈海燕
曾越
李艺
吴建新
许世锬
邹燕成
关键词 铝合金热浸镀数值模拟超声空化    
Abstract:20 kHz ultrasounds were applied in the process of 390 ℃ hot dip galvanization of 1050 aluminum alloy. The evolution of the cavitation bubbles were solved numerically from the Keller-Miksis and Mettin equations. The growth of the cavitation bubbles of 0-800 W ultrasonic cavitation and their effects in the ZnAl8 molten pool were described. The effects of the ultrasonic power on the alloy structure of the coating and the removal of the oxide film on the surface of the 1050 aluminum alloy were analyzed. The results show that cavitational effects display nonlinear relation with the ultrasonic power. For ultrasonic power in the range of 0-500 W, stable cavitation dominates. The dendritic structure of the coating ZnAl8 alloy and the aluminium oxide film remain mostly unchanged. When the power is 600-800 W, transient cavitation bubbles release energy in the form of violent collapse. The high cavitation pressure and temperature, respectively, crush and melt the oxide film on the surface of the aluminum alloy, which facilitates spreading, wetting and transfer of the elements between the aluminum substrate and the coating. Therefore, under the action of power ultrasonic waves of 700-800 W, good metallurgical bond is formed between the coating alloy and the aluminum alloy substrate, and the coating alloy displays fine and uniform rosette-like microstructure.
Key wordsaluminum alloy    hot dipping    numerical simulation    ultrasonic cavitation
收稿日期: 2020-06-15      出版日期: 2021-07-19
中图分类号:  TG178  
基金资助:2017年广州市产学研协同创新重大专项对外科技合作项目(201704030010);大学生创新创业训练计划项目(xj201911845386;xj201911845376);广东大学生科技创新培育专项资金(pdjh2020b0185)
通讯作者: 陈海燕(1974-),女,副教授,博士,研究方向:超声辅助金属加工技术,联系地址:广州大学城外环西100号广东工业大学材料与能源学院(510006),E-mail:gdutchy1@163.com     E-mail: gdutchy1@163.com
引用本文:   
陈海燕, 曾越, 李艺, 吴建新, 许世锬, 邹燕成. 基于非线性超声空化效应的铝合金热浸镀工艺[J]. 材料工程, 2021, 49(7): 133-140.
CHEN Hai-yan, ZENG Yue, LI Yi, WU Jian-xin, XU Shi-tan, ZOU Yan-cheng. Hot dip process of aluminum alloy based on nonlinear ultrasonic cavitation effect. Journal of Materials Engineering, 2021, 49(7): 133-140.
链接本文:  
http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2020.000543      或      http://jme.biam.ac.cn/CN/Y2021/V49/I7/133
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