| 均匀化时间对7085铝合金淬火敏感性的影响 |
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| 引用本文： | 郑玉林,李承波,刘胜胆,邓运来,张新明.均匀化时间对7085铝合金淬火敏感性的影响[J].中国有色金属学会会刊,2014,24(7):2275-2281. |
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| 作者姓名： | 郑玉林 李承波 刘胜胆 邓运来 张新明 |
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| 作者单位： | 中南大学材料科学与工程学院;广西南南铝业公司;中南大学有色金属材料科学与工程教育部重点实验室; |
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| 基金项目： | Project(2012CB619500)supported by the National Basic Research Program of China;Project supported by Yuying Project of Central South University |
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| 摘 要： | 采用末端淬火实验、光学显微镜（0M）、扫捕电镜（SEM）和透射电镜（TEM）研究均匀化时间对7085铝合金淬火敏感性的影响。结果表明，均匀化时间从48h延长至384h，淬火敏感性有所增加，端淬试样经人工时效后硬度的最大差值从5．2％增加到6．9％。均匀化时间延长对晶粒组织没有影响，但促使丁相的溶解，增加Al3Zr弥散粒子的尺寸，减小其密度。慢速淬火时，在晶内的Al3Zr弥散粒子上能观察到一些尺寸较小的淬火析出η相，这降低了时效后的硬度。Al3Zr粒子特征的变化对淬火敏感性影响很小。
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| 关 键 词： | 7085铝合金 均匀化 末端淬火 淬火敏感性 Al3Zr弥散粒子 平衡η相 |
| 收稿时间： | 17 October 2013 |
Effect of homogenization time on quench sensitivity of 7085 aluminum alloy |
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| Yu-lin ZHENG,Cheng-bo LI,Sheng-dan LIU,Yun-lai DENG,Xin-ming ZHANG.Effect of homogenization time on quench sensitivity of 7085 aluminum alloy[J].Transactions of Nonferrous Metals Society of China,2014,24(7):2275-2281. |
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| Authors: | Yu-lin ZHENG Cheng-bo LI Sheng-dan LIU Yun-lai DENG Xin-ming ZHANG |
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| Affiliation: | Yu-lin ZHENG, Cheng-bo LI, Sheng-dan LIU, Yun-lai DENG, Xin-ming ZHANG(1. School of Materials Science and Engineering, Central South University, Changsha 410083, China; 2. Guangxi Alnan Aluminum Inc., Nanning 530000, China; 3. Key Laboratory of Nonferrous Metal Materials Science and Engineering, Ministry of Education, Central South University, Changsha 410083, China) |
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| Abstract: | The effect of homogenization time on quench sensitivity of a cast 7085 aluminum alloy was investigated by means of end-quenching test, optical microscope （OM）, scanning electron microscope （SEM） and transmission electron microscope （TEM）. The results show that with the increase of homogenization time from 48 h to 384 h, quench sensitivity increased slightly as the largest difference in the hardness was increased from 5.2% to 6.9% in the end-quenched and aged specimens. Prolonging homogenization had little effect on the grain structure, but improved the dissolution of soluble T phase and resulted in larger Al3Zr dispersoids with a low number density. Some small quench-induced η phase particles on Al3Zr dispersoids were observed inside grains during slow quenching, which decreased hardness after subsequent aging. The change in the character of Al3Zr dispersoids exerted slight influence on quench sensitivity. |
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| Keywords: | 7085 aluminum alloy homogenization end quenching quench sensitivity Al3Zr dispersoids equilibrium η phase |
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