张秋道,朱海琴,李昀臻,李辉

• 1:烟台南山学院工学院
• 2:山东南山铝业股份有限公司国家铝合金压力加工工程技术研究中心

摘要(Abstract)：

研究了时效处理工艺和Zn元素的添加对Al-Mg-Si-Cu合金微观组织及硬度的影响,运用Jmat-Pro热力学软件计算了不同成分体系实验铝合金的相变规律,采用光学显微镜(OM)、透射电镜(TEM)和维氏硬度仪等研究了不同热处理状态下合金的微观组织和显微硬度。结果表明:Zn元素的添加对热力学平衡状态下的相演变行为没有明显的影响;固溶处理后,3种实验铝合金的显微硬度均随自然时效时间的延长而增大,且初期的硬化速率高,随后逐渐减慢直至稳态,Zn元素的添加提高了自然硬化效应;相比于固溶处理,预时效处理后的No.1～3铝合金自然时效后硬度值分别降低了5 HV、9 HV和8 HV,Zn元素的添加影响了Mg、Si原子的团簇行为,有效地消减了自然时效硬化效应;人工时效处理后,No.1～3铝合金的硬度值分别增加了13 HV、27 HV和33 HV,Zn元素的添加促进了人工时效过程β″相的强化析出,提升了人工时效硬化能力。

关键词(KeyWords)： Al-Mg-Si-Cu合金;微观组织;Zn含量;预时效处理;显微硬度

Abstract:

Keywords:

基金项目(Foundation): 山东省高校科技计划(J18KA028);; 山东省重点研发项目(2017GGX20119);; 烟台重点研发计划(2017ZH081)

作者(Author): 张秋道,朱海琴,李昀臻,李辉

DOI: 10.13289/j.issn.1009-6264.2019-0010

参考文献(References)：

• [1] Ding N,Gao F,Wang Z,et al.Life cycle energy and greenhouse gas emissions of automobiles using aluminum in China[J].Journal of Industrial Ecology,2016,20(4):818-827.
• [2] Miller W S,Zhuang L,Bottema J,et al.Recent development in aluminum alloys for the automotive industry[J].Materials Science and Engineering A,2000,280(1):37-49.
• [3] 李辉,张华,王文武,等.车身覆盖件用钢/铝组织性能对比分析[J].有色金属工程,2017,7(6):21-24.LI Hui,ZHANG Hua,WANG Wen-wu,et al.Comparative analysis of microstructure and properties of automotive steel/aluminum[J].Nonferrous Metals Engineering,2017,7(6):21-24.
• [4] Park J H,Kim K J,Lee J W,et al.Light-weight design of automotive suspension link based on design of experiment[J].International Journal of Automotive Technology,2015,16(1):67-71.
• [5] 马鸣图,游江海,路洪洲,等.铝合金汽车板性能及其应用[J].中国工程科学,2010(9):4-20.MA Ming-tu,YOU Jiang-hai,LU Hong-zhou,et al.Research progress of aluminum alloy automotive sheet and application technology[J].Engineering Sciences,2010(9):4-20.
• [6] Davidkov A,Petrov R H,Bliznuk V,et al.Microstructure and hemming properties of AA6016 aluminum alloy sheets[J].Key Engineering Materials,2011,465:451-454.
• [7] Wenner S,Marioara C D,Andersen S J,et al.Effect of room temperature storage time on precipitation in Al-Mg-Si(-Cu) alloys with different Mg/Si ratio[J].International Journal of Materials Research,2012,103(8):948-652.
• [8] Marioara C D,Andersen S J,Jansen J,et al.The influence of temperature and storage time at RT on nucleating of the β″ phase in a 6082 Al-Mg-Si alloy[J].Materials Science and Engineering A,2002,324(1/2):239-243.
• [9] Pogatscher S,Antrekowitsch H,Leitner H,et al.Mechanisms controlling the artificial aging of Al-Mg-Si alloys[J].Acta Materialia,2011,59(9):3352-3363.
• [10] Xu X X,Feng Y T,Yang P,et al.The influence of trace elements on the microstructuress and properties of the aluminum conductors[J].Results in Physics,2018,11:1058-1063.
• [11] Wei F,Mao J,Liu C F,et al.Effect of trace elements La,Ti and homogenization on electrical properties of pure aluminum[J].Rare Metal Materials and Engineering,2018,47(11):3257-3263.
• [12] Meng C Y,Zhang D,Hua C,et al.Mechanical properties,intergranular corrosion behavior and microstructure of Zn modified Al-Mg alloys[J].Journal of Alloys and Compounds,2014,617:925-932.
• [13] Wang X F,Guo M X,Luo J R,et al.Effect of Zn on microstructure,texture and mechanical properties of Al-Mg-Si-Cu alloys with a medium number of Fe-rich phase particles[J].Materials Characterization,2017,134:123-133.
• [14] Wang X F,Guo M X,Zhang J S,et al.Effect of Zn addition on the microstructure,texture evolution and mechanical properties of Al-Mg-Si-Cu alloys[J].Materials Science and Engineering A,2016,677:522-533.
• [15] Zhu S,Li Z H,Yan L Z,et al.Natrual aging behavior in pre-aged Al-Mg-Si-Cu alloys with and without Zn addition[J].Journal of Alloys and Compounds,2019,773:496-502.
• [16] Guo M X,Zhang Y D,Li J G,et al.Solute clustering in Al-Mg-Si-Cu-(Zn) alloys during aging[J].Journal of Alloys and Compounds,2019,774:347-363.

文章评论(Comment)：