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
吴蔚 1陈嘉颖 1郭锐 1王茹 1袁悠悠 1邱铨强 1程翔翔 1巨佳1
作者信息
- 1. 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
- 折叠
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.
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.
关键词
Al-Mg-Si/热处理工艺/显微组织/性能/微合金化Key words
Al-Mg-Si Alloy/heat treatment process/microstructure/property/microalloying引用本文复制引用
基金项目
江苏省高等学校大学生创新创业训练计划(202211276007Z)
出版年
2024
NETL
NSTL
万方数据