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

作　　者：朱翔鹰 朱振宇 王建华 苏旭平[1,2,3] ZHU Xiangying;ZHU Zhenyu;WANG Jianhua;SU Xuping(School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Material Surface Science and Technology,Changzhou University,Changzhou 213164,China;Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学材料科学与工程学院,江苏常州213164 [2]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 [3]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

出　　处：《热加工工艺》2024年第10期119-123,129,共6页Hot Working Technology

基　　金：国家自然科学基金项目(51074030)。

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。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 ofα-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 

分 类 号：TG166.3[金属学及工艺—热处理]