| 浇注温度对定向凝固Al－Cu合金热裂的影响 |
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| 引用本文： | 丁浩,傅恒志,刘忠元,罗栓柱.浇注温度对定向凝固Al－Cu合金热裂的影响[J].材料工程,1996(4). |
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| 作者姓名： | 丁浩 傅恒志 刘忠元 罗栓柱 |
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| 作者单位： | 西北工业大学 |
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| 摘 要： | 针对空心叶片类定向凝固铸件存在的热裂问题，开展了定向凝固热裂规律的研究。本文选择凝固参数较全的Ａｌ－Ｃｕ系合金，研究了定向凝固工艺参数之一的浇注温度对Ａｌ－０．６ｗｔ％Ｃｕ和Ａｌ－２．０ｗｔ％Ｃｕ合金热裂的影响。定向凝固热裂试验表明，提高浇注温度可以降低Ａｌ－０．６ｗｔ％Ｃｕ合金的热裂程度，但对Ａｌ－２．０ｗｔ％Ｃｕ则无作用。理论分析认为，合金在不可补缩区的冷却速率变化是改变合金热裂程度的重要因素。
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| 关 键 词： | 定向凝固，热裂，浇注温度，不可补缩区 |
Influence of Casting Temperature on Hot Cracking of Directionally Solidified Al-Cu Alloys |
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| Ding Hao,Fu Hengzhi,Liu Zhongyuan,Luo Suanzhu.Influence of Casting Temperature on Hot Cracking of Directionally Solidified Al-Cu Alloys[J].Journal of Materials Engineering,1996(4). |
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| Authors: | Ding Hao Fu Hengzhi Liu Zhongyuan Luo Suanzhu |
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| Affiliation: | Northwestern Polytechnical University |
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| Abstract: | Hot cracking experiments were carried out for Al-0.6wt%Cu and Al-2.0wt%Cu alloys in a directional solidification device.The results show that the hot cracking tendency can be decreased by raising casting temperature for Al-0.6wt% Cu alloy.However,the casting temperature had no effect on hot cracking of Al-2.0wt% Cu alloy.Cooling curves for hot cracking test pieces were measured in directional solidification process under different casting temperatures.The solidification analysis on shot cracking proved that hot cracking was influenced by the cooling rate of alloy under uncompensated stage of solidification process. |
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| Keywords: | s:directional solidification hot cracking casting temperature uncompensated stage of solidification process |
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