均匀化温度对5052铝合金显微组织和性能的影响  

Effect of Homogenization Temperature on Microstructure and Properties of 5052 Aluminum Alloy

作　　者：朱俊霖 李洋 杨红梅 李萌蘖 李俊[1] 李绍宏[1] ZHU Junlin;LI Yang;YANG Hongmei;LI Mengnie;LI Jun;LI Shaohong(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming Yunnan 650093,China)

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093

出　　处：《上海金属》2025年第1期62-66,共5页Shanghai Metals

基　　金：云南省重点研发计划(202103AA080017,202203AE140011)。

摘　　要：对5052铝合金铸锭进行了520~580℃保温20 h空冷的均匀化处理,随后检测了合金的显微组织、力学性能和电化学性能,以揭示均匀化温度对合金显微组织和性能的影响。结果表明:5052铝合金的最佳均匀化工艺为560℃保温20 h后空冷,经此工艺均匀化处理的5052铝合金中Al_(3)Fe相的析出明显减少、塑性提升,其抗拉强度为193.4 MPa,断后伸长率为24.4%,在体积分数为3.5%的NaCl溶液中的自腐蚀电位为-1.202 V,自腐蚀电流密度为8.664×10^(-6)A·cm^(2),耐蚀性最优。均匀化处理能明显减少Al_(3)Fe相的析出,降低合金晶间腐蚀倾向。A homogenization treatment consisting of soaking at temperatures ranging from 520 to 580℃for 20 h followed by air cooling was conducted on the 5052 aluminum alloy ingot,subsequently,the alloy were tested for the microstructure,mechanical properties and electrochemical properties to reveal the effect of homogenization temperature on its microstructure and properties.The results showed that the optimum homogenization process for the 5052 aluminum alloy was at soaking 560℃for 20 h then air cooling,and the 5052 aluminum alloy homogenized by this process exhibited significantly reduced precipitation of Al_(3)Fe phase and the enhanced plasticity,its tensile strength was 193.4 MPa and elongation was 24.4%,the self-corrosion potential was-1.202 V,and the self-corrosion current density was 8.664×10^(-6)A·cm^(2)in a 3.5%(by volume)NaCl solution,corrosion resistance being the best.The homogenization treatment could significantly reduce the precipitation of Al_(3)Fe phase in the alloy and reduce the tendency for the alloy to generate intergranular corrosion.

关 键 词：5052铝合金 均匀化处理 显微组织 力学性能 电化学腐蚀 

分 类 号：TG146.2[一般工业技术—材料科学与工程]