| 引用本文: | 程巨强,刘志学.变质和热处理对高强度铸造Al-Cu-Si-Mn合金组织和性能的影响[J].材料科学与工艺,2011,19(1):135-138.DOI:10.11951/j.issn.1005-0299.20110127. |
| CHENG Ju-qiang,LIU Zhi-xue.Effects of modification and heat treatment on microstructure and properties of Al-Cu-Si-Mn cast aluminum alloy[J].Materials Science and Technology,2011,19(1):135-138.DOI:10.11951/j.issn.1005-0299.20110127. |
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| 摘要: |
| 通过变质处理和热处理实验,研究了不同的Ti变质加入量和固溶时效处理对高强度铸造Al-Cu-Si-Mn合金组织和性能的影响.结果表明,试验材料的铸态组织为粗大的α(Al)固溶体和其晶界分布的θ(Al2Cu)及T(Al12CuMn2)相,加入0.15%～0.2%Ti变质处理可以细化试验材料的铸态组织,变质处理后进行固溶和时效处理,组织由α(Al)固溶体和其晶内弥散分布的二次T相组成,晶界处残留有未完全固溶的T(Al12CuMn2)相,组织中出现α(Al)晶界无析出区.Ti变质处理高强度Al-Cu-Si-Mn合金组织对壁厚效应的敏感性不明显. |
| 关键词: 变质处理 铸造Al-Cu-Si-Mn合金 固溶处理 时效 组织 性能 |
| DOI：10.11951/j.issn.1005-0299.20110127 |
| 分类号:TG166.3 |
| 基金项目: |
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| Effects of modification and heat treatment on microstructure and properties of Al-Cu-Si-Mn cast aluminum alloy |
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CHENG Ju-qiang, LIU Zhi-xue
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College of Materials Science and chemical Engineering,Xi’an Technological University,Xi’an,710032,China
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| Abstract: |
| The effects of different titanium modifier addition and solution and aging on microstructure and mechanical properties of Al-Cu-Si-Mg cast alloy were studied by modification and heat treatment test.The results show that the as-cast microstructure of test materials is made of coarse α(Al) solid solution phase and θ(Al2Cu) and T(Al12CuMn2)phase which distribute in the bound of the grain.When Ti addition is 0.15~0.2wt%,the microstructure of test materials can be refined.After solution and aging heat treatment,the microstructure of test materials is made of α(Al) phase and a lot of dispersed secondary T(Al12CuMn2)phase which distribute in the α(Al) phase and retained T(Al12CuMn2)phase in the bound of grain and the precipitate-free zones surrounding the α(Al)phase was appeared.The microstructure is not sensitive to the thickness effect of high strength Al-Cu-Si-Mn casting alloy. |
| Key words: modification:Al-Cu-Si-Mn casting alloy solution treatment aging microstructure property |
