稳定化退火温度对5059铝合金冷轧板材组织及性能的影响
Effects of Stabilizing Annealing Temperature on Microstructure and Properties of Cold-Rolled 5059 Aluminum Alloy Plate
朱庆丰 1黄建航 2高扬 2张恩阁2
作者信息
- 1. 东北大学 材料电磁过程研究教育部重点实验室,辽宁 沈阳 110819;东北大学 材料先进制备技术教育部工程研究中心,辽宁 沈阳 110819
- 2. 东北大学 材料电磁过程研究教育部重点实验室,辽宁 沈阳 110819;东北大学 材料科学与工程学院,辽宁 沈阳 110819
- 折叠
摘要
对5059铝合金冷轧板材进行了不同温度(125～275℃)保温1 h的稳定化退火处理,研究了稳定退火温度对板材组织性能的影响.研究结果表明:变形量为62.8%冷轧板材的变形组织内形成了穿过多个纤维状晶粒的剪切带;板材经不同温度(150～225℃)保温1 h退火后,沿剪切带析出连续的β相,这些板材在晶间腐蚀过程中沿着剪切带形成了腐蚀沟壑.随着退火温度由125 ℃升高至275℃,5059铝合金冷轧板材的屈服强度和抗拉强度分别由386,474 MPa降低至301,407 MPa;延伸率则由10.4%升高到18.1%.5059铝合金冷轧板材单位面积内腐蚀量则先由125℃×1 h退火板材的13.7 mg/cm2,升至200℃×1 h退火板材的53.8 mg/cm2,再逐渐降至275℃×1 h退火板材的4.9 mg/cm2.
Abstract
The cold-rolled 5059 aluminum alloy plate was annealed at different temperatures(125～275℃)for 1 h,and the effects of stabilizing annealing temperature on the microstructure and properties of the plate were studied.The results showed that shear bands passing through multiple fibrous grains were formed in the deformed microsturcture of the cold-rolled plate with deformation 62.8%.After annealing at different temperatures(150～225℃)for 1 h,the β phase was precipitated continuously along the shear bands,leading to the formation of corrosion grooves during intergranular corrosion processes.As the annealing temperature increased from 125℃to 275℃,the yield strength and tensile strength of the 5059 plate decreased from 386 and 474 MPa to 301 and 407 MPa,respectively,while the elongation increased from 10.4%to 18.1%.The corrosion amount per unit area of 5059 aluminum alloy cold-rolled plates increased from 13.7 mg/cm2 of 125℃×1 h annealed plate to 53.8 mg/cm2 of 200℃×1 h,and then gradually decreased to 4.9 mg/cm2 of 275℃×1 h annealed plate.
关键词
5059铝合金/轧制/稳定化退火/晶间腐蚀/拉伸性能Key words
5059 aluminum alloy/rolling/stabilization annealing/intergranular corrosion/tensile property引用本文复制引用
基金项目
中央高校基本科研业务费专项(N2109007)
辽宁省自然科学基金(2019-KF-05-0)
国家自然科学基金(51674078)
出版年
2024
NETL
NSTL
维普
万方数据