2618铝合金新型固溶处理工艺研究
Study on New Solid Solution Treatment Technology of 2618 Aluminum Alloy
朱翔鹰 1朱振宇 1王建华 2苏旭平2
作者信息
- 1. 常州大学 材料科学与工程学院,江苏 常州 213164;常州大学 江苏省材料表面科学与技术重点实验室,江苏常州 213164
- 2. 常州大学 材料科学与工程学院,江苏 常州 213164;常州大学 江苏省材料表面科学与技术重点实验室,江苏常州 213164;常州大学 江苏省光伏科学与工程协同创新中心,江苏 常州 213164
- 折叠
摘要
对不同固溶处理方式后的 2618 铝合金挤压态显微组织进行了观察与分析,并测定了固溶处理前后的硬度变化.结果表明:挤压态 2618 铝合金主要是由α-Al、Al9FeNi、Al7Cu2Fe和少量细小的Al2Cu相组成;在恒温+升温固溶处理时,随着固溶温度升高,2618 铝合金的硬度先升高后降低,在 547℃时达到最大值,比恒温固溶处理 2618 铝合金的硬度提高 6.1%,且合金未出现晶粒粗化和过烧现象.在恒温+升温+降温升温循环固溶处理时,随着循环次数的增加,2618 铝合金的硬度同样先升高后降低,在 2 次循环固溶处理时达到最大值,比恒温固溶处理 2618 铝合金的硬度提高14.5%,合金也未出现晶粒粗化和过烧现象.恒温+升温固溶处理或恒温+升温+降温循环固溶处理能有效提高 2618 铝合金的固溶效果和力学性能.
Abstract
The microstructure of 2618 aluminum alloy extruded state after different solution treatment was observed and analyzed.The hardness changes before and after solution treatment were measured.The results show that the extruded 2618 aluminum alloy is mainly composed of α-Al,Al9FeNi,Al7Cu2Fe and small amount of Al2Cu phases.In solution treatment at fixing temperature+temperature rise,the hardness of 2618 aluminum alloy increases first and then decreases with the increase of solid solution temperature.At 547℃,the hardness of 2618 aluminum alloy is increased by 6.1%compared with that of constant temperature solution treatment,and no grain coarsening and over-firing occur in the alloy.In solution treatment at fixing temperature+temperature rise+cooling and heating cycle,with the increase of cycle times,the hardness of 2618 aluminum alloy also increases first and then decreases.The maximum value is reached in two cycles of solid solution treatment.The hardness of 2618 aluminum alloy treated with fixing temperature solution is increased by 14.5%.There is no grain coarsening and over-burning in the alloy.Solid solution treatment of fixing temperature+temperature rise or fixing temperature+temperature rise+cooling and heating cycle can effectively improve the solid solution effect and mechanical properties of 2618 aluminum alloy.
关键词
2618铝合金/固溶处理/显微组织/力学性能Key words
2618 aluminum alloy/solution treatment/microstructure/mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据