| 2024铝合金的均匀化热处理研究 |
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| 引用本文： | 刘成,罗兵辉,王聪,杨磊.2024铝合金的均匀化热处理研究[J].铝加工,2010(4):8-14. |
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| 作者姓名： | 刘成 罗兵辉 王聪 杨磊 |
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| 作者单位： | 中南大学材料科学与工程学院,长沙,410083 |
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| 摘 要： | 采用光学显微镜(OM)、差热分析(DSC)、扫描电镜(SEM)、能谱分析(EDS)和X射线衍射(XRD)等方法,研究2024铝合金铸态与均匀化态的显微组织演化和成分分布。结果表明:2024铝合金的铸态组织枝晶偏析严重,在晶界存在很多低熔点共晶相,Cu,Mg和Mn元素在晶内及晶界分布不均匀;经过均匀化处理后,合金组织中的非平衡相逐渐溶解,各组元分布趋于均匀;该合金的过烧温度为503.1℃,合理均匀化制度为495℃,24 h,该制度与均匀化动力学方程得到的结论基本一致。
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| 关 键 词： | 2024铝合金 显微组织 均匀化处理 动力学 |
Research on Homogenization Heat Treatment for 2024 Aluminum Alloy |
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| LIU Cheng,LUO Bing-hui,WANG Cong,YANG Lei.Research on Homogenization Heat Treatment for 2024 Aluminum Alloy[J].Aluminium Fabrication,2010(4):8-14. |
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| Authors: | LIU Cheng LUO Bing-hui WANG Cong YANG Lei |
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| Affiliation: | (College of Materials Science and Engineering, Central South University, Changsha 410083,China) |
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| Abstract: | The evolution of the mierostructure and the composition distribution of as-cast and homgenized 2024 aluminum alloy were researched by optical microscopy （ OM ）,differential scanning calorimetry （ DSC ）, scanning electronmicroscopy （ SEM ）,energy speetum analysis（ESA） and X-ray diffraction （XRD）. The results show that serious dendrite segregation exists in the ingot, and many eutectie phases with low melting-point exist in the grain boundary.Cu, Mg and Mn elements distribute unevenly in the grain and grain bound- ary. The non-equilibrium eutectic phases dissolve and all elements become uniform after homogenization. The over-burnt temperature is 503.1 ℃, and the proper homogenization system of the 2024 alloy is （495℃,24h） ,which is corresponding with the results of homogenizing kinetic equation. |
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| Keywords: | 2024 aluminum alloy microstructure homogenization treatment kinetics |
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