热处理对压铸铝合金ZL102力学及导热性能的影响  

Effect of Heat Treatment on Mechanical Properties and Thermal Conductivity of Die Cast ZL102 Aluminum Alloy

作　　者：林枫[1] 陆文兴 吴孟武 LIN Feng;LU Wen-xing;WU Meng-wu(Hubei Key Laboratory of Advanced Technology for Automotive Components,Wuhan University of Technology,Wuhan 430070,Hubei,China;Guangdong Hongte Precision Technology(Zhaoqing)Co.,Ltd.,Zhaoqing 526070,Guangdong,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,湖北武汉430070 [2]广东鸿特精密技术肇庆有限公司,广东肇庆526070

出　　处：《铸造》2022年第6期683-688,共6页Foundry

基　　金：国家自然科学基金项目(51805389);湖北省重点研发计划项目(2021BAA048)。

摘　　要：采用微观组织表征以及力学与导热性能测试研究了热处理对压铸铝合金ZL102力学及导热性能的影响。结果表明,压铸铝合金ZL102室温组织中的物相包括初生α(Al)、铝硅共晶组织、初晶硅以及少量的金属间化合物。固溶处理后,压铸铝合金ZL102中的硅相发生了熔断和球化;经过时效处理,α(Al)基体上出现细密的点状第二相析出,晶界的硅相球度进一步提高。在三种热处理状态下,铝合金ZL102固溶处理后的力学性能最高,但热导率最低。综合而言,时效处理兼顾了合金的力学与导热性能,此时合金的抗拉强度212 MPa,伸长率3.9%,室温热导率142.7 W/(m·K)。The effects of heat treatment on the mechanical properties and thermal conductivity of die cast ZL102 aluminum alloy were studied by microstructure characterization and mechanical/thermal performance testing.The results showed that the phases in the microstructure of die cast ZL102 aluminum alloy at room temperature included primaryα(Al),Al-Si eutectic,primary silicon and a small amount of intermetallic compounds.The silicon phase in the die cast ZL102 aluminum alloy was fused and spheroidized after solution treatment.During aging treatment,granular second phases precipitated inα(Al)matrix,and the sphericity of the silicon phase at grain boundaries was further improved.Under the three heat treatment conditions,the mechanical properties of the ZL102 aluminum alloy after solution treatment were the highest,but the thermal conductivity was the lowest.Generally,the aging treatment can ensure the alloy a good combination of the mechanical properties and thermal conductivity,i.e.,the ultimate tensile strength of the alloy was 212 MPa,the elongation was 3.9%,and the thermal conductivity at room temperature was 142.7 W/(m·K).

关 键 词：铝合金ZL102 压铸 热处理 力学性能 热导率 

分 类 号：TG146.2[一般工业技术—材料科学与工程]