一种新型耐热铝合金均匀化工艺的研究  

Study on Homogenization Processes of a New Type Heat Resistant Aluminum Alloy

作　　者：夏卿坤[1] 刘志义[1] 余日成[1] 李云涛[1] 

机构地区：[1]中南大学材料科学与工程学院

出　　处：《铸造》2007年第1期23-25,共3页Foundry

摘　　要：通过差热分析(DTA)、金相组织观察等手段,分析了不同均匀化工艺对新型耐热铝合金的微观组织和力学性能的影响。结果表明,采用接近低熔点共晶熔化的温度均匀化退火后,合金的枝晶偏析得以消除,晶内成分分布均匀。合金室温力学性能中的抗拉强度达到470MPa,对应的伸长率也达到8%～10%。Based on differential thermal analysis （DTA）, optical microscope, the effect of different kinds of homogenization heat treatments performing on microstructures and mechanical properties of a new type heat resistant aluminum alloy was investigated. The results show that the processing of homogenizing heat treatment, of which the temperature is close to the melting point of non-equilibrium eutecUc phases, can be made the alloy obtain a fine grain boundary and the dendrites segregation is eliminated almost; the structure distributes equality. The second phase solution into the AI matrix. The alloy＇s tensile strength is about 470MPa and the elongation is about 8%-10%.

关 键 词：AL-CU-MG-AG合金 均匀化退火 显微组织 

分 类 号：TG27[金属学及工艺—铸造]