中南大学学报（自然科学版）2018，Vol.49Issue(1)：31-38,8.DOI:10.11817/j.issn.1672-7207.2018.01.005
超声预处理对ZL205A铝合金铸件凝固组织的影响
Effect of ultrasonic pretreatment on microstructures of ZL205A aluminum alloy casting
摘要
Abstract
In order to study the influence of ultrasonic pretreatment(UT) of ZL205A aluminum alloy melt in high temperature range on the casting microstructures and its mechanism,ultrasonic treatment was applied in the molten ZL205A aluminum alloy in different temperature ranges above its liquidus. The results show that UT applied in the molten ZL205A aluminum alloy at different temperatures above its liquidus can effectively reduce the porosity in its solidification structure, refine its casting microstructure and the refinement is gradually weakened by increasing the temperature of applying ultrasonic vibration. Ultrasonic cavitation/assists the formation and distribution of Al3Ti and increases the nucleation rate, which is the main mechanism of refining casting solidification structure after ultrasonic pretreatment of molten ZL205A aluminum alloy.关键词
ZL205A铝合金/超声场/凝固组织/空化Key words
ZL205A aluminum alloy/ultrasonic field/solidification structure/cavitation分类
矿业与冶金引用本文复制引用
曹飞,蒋日鹏,李晓谦,李瑞卿,董方..超声预处理对ZL205A铝合金铸件凝固组织的影响[J].中南大学学报（自然科学版）,2018,49(1):31-38,8.基金项目
国家自然科学基金面上资助项目(51475480) （51475480）
湖南省自然科学基金青年基金资助项目(2017JJ3391) (Project(51475480) supported by the National Natural Science Foundation of China （2017JJ3391）
Project(2017JJ3391) supported by Hunan Natural Science Foundation) （2017JJ3391）
