| 半固态2024合金部分重熔新工艺与组织演变 |
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| 引用本文： | 王顺成,李元元,陈维平,郑小平.半固态2024合金部分重熔新工艺与组织演变[J].稀有金属材料与工程,2009,38(Z1). |
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| 作者姓名： | 王顺成 李元元 陈维平 郑小平 |
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| 作者单位： | 华南理工大学,广东,广州,510640 |
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| 基金项目： | 中国博士后科学基金，华南理工大学博士后创新科学基金 |
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| 摘 要： | 提出半固态坯料先在液相线以上某温度适当等温加热,然后再降低温度至两相区继续等温保温的两步法部分重熔新工艺.采用该工艺对低过热度浇注半固态2024合金坯料进行部分重熔试验,利用光学显微镜和金相图像分析系统,研究了坯料组织演变规律,并与两相区等温部分重熔工艺进行了比较.结果表明,采用两步法部分重熔工艺.由于坯料升温速度加快和熔化过热温度提高,抑制了晶间共晶相的溶解扩散,晶间液相形成速度明显加快,对晶粒合并长大具有一定的抑制作用,并加速晶粒球化,坯料部分重熔后,晶粒更加细小和圆整.
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| 关 键 词： | 半固态金属 触变成形 部分重熔 组织演变 |
Novel Partial Remelting Process and Microstructure Evolution of Semi-Solid 2024 Alloy |
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| Wang Shuncheng,Li Yuanyuan,Chen Weiping,Zheng Xiaoping.Novel Partial Remelting Process and Microstructure Evolution of Semi-Solid 2024 Alloy[J].Rare Metal Materials and Engineering,2009,38(Z1). |
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| Authors: | Wang Shuncheng Li Yuanyuan Chen Weiping Zheng Xiaoping |
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| Affiliation: | Wang Shuncheng,Li Yuanyuan,Chen Weiping,Zheng Xiaoping (South China University of Technology,Guangzhou 510640,China) |
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| Abstract: | A two-step partial remelting process was proposed and applied to perform partial remelting experiments on the semi-solid 2024 alloy billet prepared by low superheat pouring. In this process,the semi-solid billet was firstly heated isothermally over liquids temperature for a few seconds,and then held isothermally at solidus-liquidus zone temperature. The microstructure evolution of the semi-solid billet during the two-step partial remelting process was studied and compared with that during isothermal partial... |
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| Keywords: | semi-solid metal thixoforming partial remelting microstructure evolution |
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