摘要
对2024合金薄板进行了固溶和时效热处理,研究了时效时间对合金硬度、电导率、力学性能、组织和断口形貌的影响。结果表明,经过固溶和时效处理后,2024合金组织主要由α-Al、Al_7Cu_2Fe和Al_2CuMg相组成。随着时效时间增加,显微硬度先增大后降低,在24h时显微硬度最大。电导率随时效时间延长而提高,时效12~24 h时,电导率增加速度较快,超过24 h后的增加速度变缓。经过490℃×1h固溶+175℃×24 h时效处理后,2024合金可以取得最佳的强度和塑性结合。
The 2024 alloy sheet was heat-treated by solid solution and aging, the effect of aging time on the hardness, electric conductivity, mechanical properties, metallographic and fractographic morphology of 2024 alloy was studied. The results show that the main phase in 2024 alloy after solid solution and aging treatment are of α-Al, A17Cu2Fe and Al2CuMg phase. The microhardness of the alloy increases and then decreases with the increase of aging time, and the microhardness is greatest at the aging time of 24 h. The electrical conductivity increases with the increase of aging time, the electrical conductivity increases faster at the aging time of 12 h-24 h, and when the aging time exceeds 24 h, the electrical conductivity increases slowly. The best strength and plasticity combination of 2024 alloy can be achieved with 490℃×1h solid solution and 175℃×24 h aging treatment. Key words：
作者
彭焕伟
孙亚军
PENG Huanwei SUN Yajun(College of Mechanical and Electrical Engineering, Jilin Province Economic Management Cadre College, Changchtm, 130012, China FAW Engine Branch Company, Changchun, 130000, China)
出处
《铸造技术》
CAS
北大核心
2017年第3期581-584,共4页
Foundry Technology
基金
基金项目:专业技能型人才培养模式研究与实践(2014 年吉林省教学成果奖)
关键词
2024铝合金
固溶
时效
力学性能
电导率
2024 alloy
solid solution
aging
mechanical properties
conductivity
