汽车车身板用高强Al-Mg-Si-(Ag/Cu)合金的时效工艺

doi:10.13251/j.issn.0254-6051.2024.05.030

金属热处理 ›› 2024, Vol. 49 ›› Issue (5): 179-185.DOI: 10.13251/j.issn.0254-6051.2024.05.030

汽车车身板用高强Al-Mg-Si-(Ag/Cu)合金的时效工艺

吴蔚, 陈嘉颖, 郭锐, 王茹, 袁悠悠, 邱铨强, 程翔翔, 巨佳

南京工程学院材料科学与工程学院江苏省先进结构材料与应用重点实验室, 江苏南京 211167

收稿日期:2023-10-21 修回日期:2024-03-20 出版日期:2024-05-25 发布日期:2024-06-28
通讯作者: 巨佳,教授,博士,E-mail:materialju@njit.edu.cn
作者简介:吴蔚(2001—),女,硕士研究生,主要研究方向为高性能铝合金加工及热处理,E-mail:wwnjit@163.com。
基金资助:
江苏省高等学校大学生创新创业计划(202211276007Z)

Aging process of high-strength Al-Mg-Si-(Ag/Cu) alloy for automobile body sheet

Wu Wei, Chen Jiaying, Guo Rui, Wang Ru, Yuan Youyou, Qiu Quanqiang, Cheng Xiangxiang, Ju Jia

Jiangsu Province Key Laboratory of Advanced Structural Materials, School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing Jiangsu 211167,China

Received:2023-10-21 Revised:2024-03-20 Online:2024-05-25 Published:2024-06-28

摘要/Abstract

摘要： 采用硬度测试、拉伸试验、显微观察仪器等研究不同时效处理工艺下Al-Mg-Si、Al-Mg-Si-Ag、Al-Mg-Si-Cu合金的时效强化特性及微观结构。结果表明,Ag的加入使得铝合金峰值时效的硬度值有所改进,其峰值硬度为141.01 HV0.5,较Al-Mg-Si和Al-Mg-Si-Cu合金的峰值硬度值增加9.35%和1.53%。这是由于Al-Mg-Si-Ag合金在峰值时效阶段形成的析出强化相β″粒径更加微小,其平均长度较Al-Mg-Si和Al-Mg-Si-Cu合金减少40.05%和23.09%,位置分散更加广。根据对比试验可得,Ag微合金化使Al-Mg-Si合金具有更加明显的沉淀强化效果。因此,Al-Mg-Si-Ag合金具有更优良的综合性能,该研究将为设计新型汽车车身板材的热处理工艺制定提供了一定的理论支持。

关键词: Al-Mg-Si, 热处理工艺, 显微组织, 性能, 微合金化

Abstract: Aging strengthening characteristics and microstructure of Al-Mg-Si,Al-Mg-Si Ag,Al-Mg-Si-Cu alloys under different aging treatment conditions were investigated by hardness testing,tensile testing,microscopic inspection. The results show that the addition of Ag improves the hardness value of the alloy during peak aging with a peak hardness of 141.01 HV0.5,representing an increase of 9.35% and 1.53% compared to that of Al-Mg-Si and Al-Mg-Si-Cu alloys. The smaller average size and wider dispersion of the precipitation-strengthening phase β″ formed during the peak aging stage of the Al-Mg-Si-Ag alloy contribute to a reduction in length by 40.05% and 23.09% compared to that of the Al-Mg-Si and Al-Mg-Si-Cu alloys,and the spatial distribution is more dispersed. According to comparative tests,the Ag microalloying has a more significant precipitation strengthening effect on Al-Mg-Si alloy. Therefore,the Al-Mg-Si-Ag alloy has better comprehensive properties,demonstrating that this research may provide some theoretical support for the development of heat treatment processes for designing new types of automobile body sheet.

Key words: Al-Mg-Si Alloy, heat treatment process, microstructure, property, microalloying

中图分类号:

TG161

吴蔚, 陈嘉颖, 郭锐, 王茹, 袁悠悠, 邱铨强, 程翔翔, 巨佳. 汽车车身板用高强Al-Mg-Si-(Ag/Cu)合金的时效工艺[J]. 金属热处理, 2024, 49(5): 179-185.

Wu Wei, Chen Jiaying, Guo Rui, Wang Ru, Yuan Youyou, Qiu Quanqiang, Cheng Xiangxiang, Ju Jia. Aging process of high-strength Al-Mg-Si-(Ag/Cu) alloy for automobile body sheet[J]. Heat Treatment of Metals, 2024, 49(5): 179-185.

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汽车车身板用高强Al-Mg-Si-(Ag/Cu)合金的时效工艺

Aging process of high-strength Al-Mg-Si-(Ag/Cu) alloy for automobile body sheet

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