摘要
为了研究大飞机蒙皮用2024包铝薄板元素扩散及性能之间的关系,采用OM、SEM、拉伸试验等分析手段,研究了保温时间对2024包铝薄板过渡层元素扩散及其力学性能的影响。结果表明,随着保温时间的延长,过渡层主合金元素开始逐渐向包铝层扩展。当保温时间为10 min时,主合金元素Mg、Cu元素的扩散增长较为明显,当保温时间达到40 min时,主合金元素扩散到整个包覆层。合金的力学性能随着保温时间的延长先快速增加,然后趋于平缓。保温处理2 min时合金屈服强度为137 MPa,10 min后达到272 MPa。随着保温时间的继续延长,合金的屈服强度增加较为缓慢,15 min后保持在280 MPa左右。因此,采用连退线对大尺寸2024包铝薄板进行固溶处理时,合适的保温时间为10 min。在这样的固溶处理工艺下,合金元素扩散距离较小,同时合金的屈服强度也达到要求。
In order to investigate the relationship between element diffusion and performance of 2024 alclad sheet for the large aircraft skin.In this work,OM,SEM,and tensile tests are used to study the effects of solution time on the transition layer element diffusion and the mechanical properties of 2024 alu minum alloy clad sheet.The results show that the main alloy elements of the transition layer begin to gradually expand to the alu minum clad layer with the solution time increasing.When the solution time is 10 min,the diffusion of the main alloy elements Mg and Cu is very obvious.When the solution time reaches to 40 min,the main alloy elements almost diffused to the entire coating layer.The mechanical properties first increase rapidly with the solid solution time increasing,then tends to increase slower.The yield strength of the sample after solution treatment was 137 MPa for 2 min,and reached 272 MPa after 10 min.With the increase of solution time,the yield strength increased slowly,and basically remained at 280 MPa after 15 min.Therefore,when the continuous annealing line is used to solution treatment of large-size 2024 alclad sheet,the appropriate solution time is 10 min.The diffusion distance of alloy elements is small,and the yield strength of the alloy also meets the requirements after this solution treatment process.
作者
黄同瑊
晁代义
于芳
张芮源
周艳艳
赵晓红
徐志远
HUANG Tongjian;CHAO Daiyi;YU Fang;ZHANG Ruiyuan;ZHOU Yanyan;ZHAO Xiaohong;XU Zhiyuan(National Engineering Research Center for Plastic Working of Aluminum Alloys,Shandong Nanshan Aluminum Co.,Ltd.,Longkou 265713,China;Shandong Nanshan Science and Technology Research Institute Co.,Ltd.,Longkou 265713,China;College of Engineering,Yantai Nanshan University,Longkou 265713,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第S01期421-424,共4页
Materials Reports
