固溶温度对汽车用6016铝合金组织与性能的影响
Influence of solution treatment temperature on microstructure and properties of 6016 aluminum alloy for automobiles
闵旭东 1罗沁 1郑明煜 1习禹 1杨晨光 1李想1
作者信息
- 1. 成都工业学院智能制造学院,四川成都 611730
- 折叠
摘要
采用光学显微镜、扫描电镜、能谱仪及电子万能试验机等研究了固溶温度(530～580 ℃)对汽车用6016铝合金冷轧板材的微观组织、力学性能和拉伸断口形貌的影响.结果表明:合金强度和伸长率随固溶温度的升高先增大后减小;合金在不同温度固溶处理后的断裂机制均为韧性断裂.合金经550 ℃固溶处理30 min及人工时效后具有最佳的力学性能,其屈服强度、抗拉强度和伸长率分别为230.2 MPa、286.8 MPa和12.9％,这主要归因于此时合金基体中的Mg、Si等溶质原子溶解的更充分,AIFeSi等细小而未过烧的第二相的形成,以及时效后更多沉淀强化相的析出.
Abstract
Influence of solution treatment temperature(530-580 ℃)on microstructure,mechanical properties and tensile fracture morphology of 6016 aluminum alloy cold-rolled sheet for automobiles was studied by means of optical microscope,scanning electron microscopy,energy dispersive spectrometer and electronic universal testing machine.The results show that the strength and elongation of the alloy first increase and then decrease with the increase of solution treatment temperature.The fracture mechanism of the alloy after solution treatment at different temperatures is ductile fracture.The alloy exhibits the best mechanical properties after solution treatment at 550 ℃ for 30 min and artificial aging,and its yield strength,tensile strength and elongation are 230.2 MPa,286.8 MPa and 12.9％,respectively.This is mainly attributed to the more complete dissolution of solute atoms such as Mg and Si in the alloy matrix,the formation of fine and unburned second phases such as AlFeSi,and the precipitation of more precipitation strengthening phases after aging.
关键词
6016铝合金/固溶温度/微观组织/力学性能Key words
6016 aluminum alloy/solution treatment temperature/microstructure/mechanical property引用本文复制引用
基金项目
成都工业学院校级项目(2023ZR021)
出版年
2024
NETL
NSTL
万方数据