工程科学学报，第41卷，第8期：1007-1015,2019年8月 Chinese Journal of Engineering,Vol.41,No.8:1007-1015,August 2019 DOI:10.13374/j.issn2095-9389.2019.08.006;http://journals.ustb.edu.cn 超声外场对不同温控状态下ZL205A铝合金凝固规律 的影响 商 兵12)，蒋日鹏2,3)，李晓谦12)，李瑞卿23》，张昀2)，张立华12) 1)中南大学机电工程学院，长沙4100832)中南大学轻合金研究院，长沙410083 3)中南大学高性能复杂制造国家重点实验室，长沙410083 ☒通信作者，E-mail:jiangripeng@163.com 摘要采用不同的超声外场处理熔体工艺，研究了其对铸锭质量的作用机理与改善效果.针对保温(750℃)和空冷（从750 ℃空冷7min10s至约650℃)两种不同温控状态下的ZL205A铝合金熔体，分别进行相同参数的超声场处理，研究超声场对凝 固组织的影响规律，并利用力学拉伸实验进行验证.研究结果表明：在保温状态下对熔体施加超声处理，具有较好的除气与改 善第二相组织分布的效果：在空冷状态下施加超声处理则可以消除集中缩孔，显著细化晶粒：当在保温和空冷条件下全程采 用超声处理，铸锭内部质量的改善效果最佳.力学性能的测试结果与铸锭凝固组织的变化规律具有一致性，验证了上述结论. 综上，对不同温控状态下的熔体施加超声处理，对熔体凝固过程的影响不同，对铸锭内部质量的改善效果也各有侧重. 关键词超声波处理：ZI205A铝合金：补缩性能：凝固组织：熔体 分类号TG249.9 Effect of ultrasonic outfield on solidification rules of ZL205A aluminum alloy under different temperature-control states SHANG Bing),JIANG Ri--peng2a,山Xiao-gian2),山Rui-ging2》,ZHANG Yun2-》,ZHANG Li--ha2) 1)College of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China 2)Light Alloy Research Institute,Central South University,Changsha 410083,China 3)State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China Corresponding author,E-mail:jiangripeng@163.com ABSTRACT Since the development of the aviation industry,improving the flight performance and reducing the weight of aircrafts has always been the goal pursued by aviation designers.Therefore,it becomes increasingly important to develop a new alloy material with high hardness,high strength,and light weight.To obtain excellent mechanical properties and good corrosion resistance,a new kind of alloy material,Z1205A alloy,was developed by the Beijing Institute of Aerial Materials (BAM)in the 1960s.Owing to its favorable mechanical properties and excellent corrosion resistance,Z1205A alloy has been well applied in the aviation industry.However,this kind of Al alloy still possesses some undesirable solidification defects:shrinkage,porosities,coarsening grains,and solute segregation. Ultrasonic melt treatment (UST)provides a means to eliminate or modify these defects.In the present work,the effects of UST on Z1205A alloy were investigated for two conditions,i.e.,before casting and during solidification in ambient environment.Then,the effects of ultrasonication on the as-cast microstructures and the tensile properties were accordingly characterized and analyzed.For the case in which UST was only introduced before casting (holding temperature at 750 C),degassing and the distribution of secondary phases were modified.For the case in which UST was only introduced when cooling from 750 C for 7 min 10s to about 650 C,grain re- 收稿日期：2018-07-16 基金项目：国家自然科学基金资助项目(51575539)：湖南省自然科学基金资助项目(2017B391):湖南省科技重大专项资助项目 (2016GK1004)工程科学学报,第 41 卷,第 8 期:1007鄄鄄1015,2019 年 8 月 Chinese Journal of Engineering, Vol. 41, No. 8: 1007鄄鄄1015, August 2019 DOI: 10. 13374 / j. issn2095鄄鄄9389. 2019. 08. 006; http: / / journals. ustb. edu. cn 超声外场对不同温控状态下 ZL205A 铝合金凝固规律 的影响 商 兵1,2) , 蒋日鹏2,3) 苣 , 李晓谦1,2) , 李瑞卿2,3) , 张 昀2,3) , 张立华1,2) 1)中南大学机电工程学院, 长沙 410083 2)中南大学轻合金研究院, 长沙 410083 3)中南大学高性能复杂制造国家重点实验室, 长沙 410083 苣通信作者, E鄄mail: jiangripeng@ 163. com 摘 要 采用不同的超声外场处理熔体工艺,研究了其对铸锭质量的作用机理与改善效果. 针对保温(750 益 )和空冷(从 750 益 空冷 7 min 10 s 至约 650 益 )两种不同温控状态下的 ZL205A 铝合金熔体,分别进行相同参数的超声场处理,研究超声场对凝 固组织的影响规律,并利用力学拉伸实验进行验证. 研究结果表明:在保温状态下对熔体施加超声处理,具有较好的除气与改 善第二相组织分布的效果;在空冷状态下施加超声处理则可以消除集中缩孔,显著细化晶粒;当在保温和空冷条件下全程采 用超声处理,铸锭内部质量的改善效果最佳. 力学性能的测试结果与铸锭凝固组织的变化规律具有一致性,验证了上述结论. 综上,对不同温控状态下的熔体施加超声处理,对熔体凝固过程的影响不同,对铸锭内部质量的改善效果也各有侧重. 关键词 超声波处理; ZL205A 铝合金; 补缩性能; 凝固组织; 熔体 分类号 TG249郾 9 收稿日期: 2018鄄鄄07鄄鄄16 基金项目: 国家自然科学基金资助项目 ( 51575539 ); 湖南省自然科学基金资助项目 ( 2017JJ3391 ); 湖南省科技重大 专 项 资 助 项 目 (2016GK1004) Effect of ultrasonic outfield on solidification rules of ZL205A aluminum alloy under different temperature鄄control states SHANG Bing 1,2) , JIANG Ri鄄peng 2,3) 苣 , LI Xiao鄄qian 1,2) , LI Rui鄄qing 2,3) , ZHANG Yun 2,3) , ZHANG Li鄄hua 1,2) 1) College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, China 2) Light Alloy Research Institute, Central South University, Changsha 410083, China 3) State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, China 苣Corresponding author, E鄄mail: jiangripeng@ 163. com ABSTRACT Since the development of the aviation industry, improving the flight performance and reducing the weight of aircrafts has always been the goal pursued by aviation designers. Therefore, it becomes increasingly important to develop a new alloy material with high hardness, high strength, and light weight. To obtain excellent mechanical properties and good corrosion resistance, a new kind of alloy material, ZL205A alloy, was developed by the Beijing Institute of Aerial Materials (BAM) in the 1960s. Owing to its favorable mechanical properties and excellent corrosion resistance, ZL205A alloy has been well applied in the aviation industry. However, this kind of Al alloy still possesses some undesirable solidification defects: shrinkage, porosities, coarsening grains, and solute segregation. Ultrasonic melt treatment (UST) provides a means to eliminate or modify these defects. In the present work, the effects of UST on ZL205A alloy were investigated for two conditions, i. e. , before casting and during solidification in ambient environment. Then, the effects of ultrasonication on the as鄄cast microstructures and the tensile properties were accordingly characterized and analyzed. For the case in which UST was only introduced before casting ( holding temperature at 750 益 ), degassing and the distribution of secondary phases were modified. For the case in which UST was only introduced when cooling from 750 益 for 7 min 10 s to about 650 益 , grain re鄄