不同退火工艺对5182铝合金板材表面质量的影响
Effect of different annealing processes on surface quality of 5182 aluminum alloy sheet
孙宁 1王经涛 1李涛 2王芝东 2迟蕊 2徐志远 2杨立民 2郭丰佳2
作者信息
- 1. 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,山东龙口 265713;烟台南山学院材料科学与工程学院,山东龙口 265713
- 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,山东龙口 265713
- 折叠
摘要
通过阳极氧化覆膜、拉伸试验系统地研究了不同退火工艺处理的5182铝合金板材的显微组织及拉伸性能.结果表明,退火时间越长,板材再结晶晶粒尺寸越大,大小晶粒的变形不同步会导致屈服平台缩短;提高退火温度可降低基体中的位错密度,水冷可阻碍溶质原子向位错扩散,降低溶质原子与位错的交互作用,有利于消除板材冲压过程中的吕德斯带.随着退火温度的提高,5182铝合金板材的抗拉强度和屈服强度均降低,且在相同温度退火时,炉冷合金板材的强度低于空冷和水冷,伸长率则变化不明显.
Abstract
Microstructure and tensile properties of 5182 aluminum alloy sheets treated under different annealing processes through anodized coating and tensile testing were systematicly studied.The results show that the longer the annealing time is,the larger the grain size of the sheet becomes,and the unsynchronized deformation of the grain size can lead to a shortened yield plateau.The dislocation density in the matrix can be reduced by increasing the annealing temperature.Water cooling can hinder the diffusion of solute atoms towards dislocations,reduce the interaction between solute atoms and dislocations,which helps eliminate the Lüders band during the sheet stamping process.With the increase of annealing temperature,the tensile strength and yield strength of 5182 aluminum alloy sheet is decreased,and when annealed at the same temperature,the strength of furnace cooled alloy sheet is lower than that of air cooled and water cooled,while the change in elongation is not significant.
关键词
5182铝合金板材/吕德斯带/位错/钉扎/脱钉Key words
5182 aluminum alloy sheet/Luders band/dislocation/pinning/unpinning引用本文复制引用
出版年
2024
NETL
NSTL
万方数据