Effect of homogenization on microstructure of 3003 aluminium alloy ingot
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将3003铝合金铸锭分别在580～620 ℃进行4～10 h的均匀化处理,研究不同均匀化处理工艺对3003铝合金铸锭微观组织演变的影响.结果表明,3003铝合金铸锭中的析出相主要为MnAl6((FeMn)Al6)和Al0.41MnSi0.74(Al12(FeMn)3Si),MnAl6((FeMn)Al6)相在均匀化过程中几乎完全溶解;而Al0.41MnSi0.74(Al12(FeMn)3Si)相会在均匀化过程中逐步发生聚合、粗化和回溶行为.随着均匀化温度的升高和时间的延长,析出相的演变会逐渐加快.3003铝合金能快速获得均匀分布、圆润粗大析出相的最优均匀化工艺为600 ℃保温8 h.
Homogenization treatment was carried out at 580-620 ℃ for 4-10 h to study the effect of different homogenization processes on the microstructure evolution of 3003 aluminium alloy ingot.The results show that the precipitates in the alloy ingot are mainly MnAl6((FeMn)Al6)and Al0 41 MnSi0 74(Al12(FeMn)3Si),while the MnAl6((FeMn)Al6)phase is almost completely dissolved during the homogenization process.However,the Al0 41 MnSi0 74(Al12(FeMn)3Si)phase is gradually subject to aggregation,coarsening and dissolution during the homogenization process.With the increase of homogenization temperature and prolongation of holding time,the evolution of precipitates is accelerated gradually.The optimum homogenization process of the 3003 aluminium alloy which can quickly obtain uniformly distributed,round and coarse precipitates is holding at 600 ℃ for 8 h.
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