大规格高纯净6463铝合金铸锭的均匀化处理工艺
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摘要
利用光学显微镜、X射线衍射仪、扫描电镜和透射电镜研究了均匀化温度和时间对高纯6463铝合金微观组织及第二相形貌的影响。结果表明:高纯6463铝合金铸锭的枝晶相由细长棒状Al_9Fe_2Si_2和针状或片状初生Mg_2Si组成,随着均匀化温度的升高和时间的延长,细长棒状Al_9Fe_2Si_2发生球化、分解形成颗粒状Al_(12)Fe_3Si,而针状或片状Mg_2Si则全部回溶入基体。大规格高纯净6463铝合金铸锭较为合理的均匀化温度应570～616℃,均匀时间应≥24 h,可使大多数细长棒状β-AlFeSi发生球化、分解成颗粒状α-AlFeSi。
The effects of homogenization temperature and time on microstructure and second phase morphology of high purity 6463 aluminum alloy were studied by means of optical microscopy,X-ray diffractometer,scanning electron microscopy and transmission electron microscopy.The results show that the dendritic phase of high purity 6463 aluminum alloy ingot is composed of rod-like Al_9Fe_2Si_2 and plate-or needle-like Mg_2Si.With the increase of homogenization temperature and the extension of time,the Al_9Fe_2Si_2 is spheroidized and decomposed to form granular Al_(12)Fe_3Si,while all the plate-or needle-like Mg_2Si are dissolved into the matrix.The reasonable homogenization temperature of large size and high purity 6463 aluminum alloy ingot should be 570-616 ℃,even time should be greater than 24 h,which can make the most of the rod-like β-AlFeSi spheroidise or decompose into granular α-AlFeSi.
The effects of homogenization temperature and time on microstructure and second phase morphology of high purity 6463 aluminum alloy were studied by means of optical microscopy,X-ray diffractometer,scanning electron microscopy and transmission electron microscopy.The results show that the dendritic phase of high purity 6463 aluminum alloy ingot is composed of rod-like Al_9Fe_2Si_2 and plate-or needle-like Mg_2Si.With the increase of homogenization temperature and the extension of time,the Al_9Fe_2Si_2 is spheroidized and decomposed to form granular Al_(12)Fe_3Si,while all the plate-or needle-like Mg_2Si are dissolved into the matrix.The reasonable homogenization temperature of large size and high purity 6463 aluminum alloy ingot should be 570-616 ℃,even time should be greater than 24 h,which can make the most of the rod-like β-AlFeSi spheroidise or decompose into granular α-AlFeSi.
引文
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[3]吴晓滨.6063阳极氧化铝合金在热处理过程中的电化学性能分析[J].铸造技术,2015,36(12):2877-2879.Wu Xiaobin.Electrochemical performance of 6063 anodic oxide aluminum alloy in heat treatment process[J].Foundry Technology,2015,36(12):2877-2879.
[4]李森.6061铝合金阳极氧化金黄色膜层研究[D].沈阳:沈阳理工大学,2014.Li Sen.Research on golden films by anodic oxidation and electrolytic coloring of 6061 Al alloy[D].Shenyang:Shenyang Ligong University,2014.
[5]周学浩,孙有平,张扬扬,等.均匀化处理对Al-Mg-Si-Cu合金铸态组织与性能的影响[J].金属热处理,2017,42(6):93-96.Zhou Xuehao,Sun Youping,Zhang Yangyang,et al.Effect of homogenizing treatment on microstructure and mechanical properties of as-cast Al-Mg-Si-Cu alloy[J].Heat Treatment of Metals,2017,42(6):93-96.
[6]刘可鑫,李云涛.新型Al-Mg-Si-Cu铝合金的均匀化处理工艺[J].金属热处理,2011,36(7):55-57.Liu Kexin,Li Yuntao.Homogenization process for a new Al-Mg-Si-Cu alloy[J].Heat Treatment of metals,2011,36(7):55-57.
[7]石玲,何金,王彦俊,等.6063合金铸锭中结晶相及其均匀化[J].热处理技术与装备,2017,38(1):1-7.Shi Ling,He Jin,Wang Yanjun,et al.Crystalline phase and its homogenization in 6063 aluminum alloy ingot[J].Heat Treatment Technology and Equipment,2017,38(1):1-7.
[8]莫肇月,朱玉涛,刘莹.固溶温度及拉矫延伸率对6061铝合金带材表面橘皮缺陷的影响[J].金属热处理,2018,43(6):183-185.Mo Zhaoyue,Zhu Yutao,Liu Ying.Effect of solution temperature and tension levelling elongation on surface orange peel of 6061aluminum alloy strip[J].Heat Treatment of Metals,2018,43(6):183-185.
[9]李辉,罗杰,尹登峰,等.固溶及预时效处理对6022铝合金组织与性能的影响[J].金属热处理,2017,42(7):76-79.Li Hui,Luo Jie,Yin Dengfeng,et al.Influence of solution and preanging treatment on microstructure and properties of 6022 aluminum alloly[J].Heat Treatment of Metals,2017,42(7):76-79.
[10]张珊珊.Al-Mg-Si合金铸态组织及其铸锭均匀化处理研究[D].沈阳:东北大学,2011.Zhang Shanshan.Study on microstructure and homogenization treatment of semicontinuous casting ingot of Al-Mg-Si Aluminium alloys[D].Shenyang:Northeastern University,2011.
[11]杜鹏,闫晓东,李彦利,等.6061铝合金中富铁相在均匀化过程中的相变机理[J].中国有色金属学报,2011,21(5):981-987.Du Peng,Yan Xiaodong,Li Yanli,et al.Transformation mechanism of iron-rich phase in 6061 aluminum alloy during homogenization[J].The Chinese Journal of Nonferrous Metals,2011,21(5):981-987.