| Rapidly solidified hypereutectic Al-Si alloys prepared by powder hot extrusion |
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| 作者姓名： | 李元元 张大童 NGAI Tungwai Leo 张卫文 |
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| 作者单位： | MechatronicEngineeringCollege,SouthChinaUniversityofTechnology,Guangzhou510640,China同 |
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| 基金项目： | Project( 5 9875 0 19)supportedbytheNationalNaturalScienceFoundationofChinaandproject( 95 0 16 7)supportedbytheNat uralScienceFoundationofGuangdongProvince |
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| 摘 要： | Rapidly solidified hypereutectic Al-Si alloys were prepared by powder hot extrusion.By eliminating vacuum degassing procedure.the fabrication routine was simplified.The tensile fracture mechanisms at room temperature and elevated temperature were investigated by SEM fractography.Compared with KS282 casting material,the tensile strength of rapidly solidified Al-Si alloy is greatly improved due to silicon particles refining while its density and coefficient of thermal expansion are lower.than those of KS282.The wear resistance of RS AlSi is better than that of KS282.
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| 关 键 词： | 达共晶铝硅合金 快速凝固 粉末热挤压 性能 |
Rapidly solidified hypereutectic Al-Si alloys prepared by powder hot extrusion |
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| NGAI Tungwai Leo.Rapidly solidified hypereutectic Al-Si alloys prepared by powder hot extrusion[J].Transactions of Nonferrous Metals Society of China,2002,12(5):878-881. |
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| Authors: | NGAI Tungwai Leo |
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| Abstract: | Rapidly solidified hypereutectic Al-Si alloys were prepared by powder hot extrusion. By eliminating vacuum degassing procedure, the fabrication routine was simplified. The tensile fracture mechanisms at room temperature and elevated temperature were investigated by SEM fractography. Compared with KS282 casting material, the tensile strength of rapidly solidified Al-Si alloy is greatly improved due to silicon particles refining while its density and coefficient of thermal expansion are lower than those of KS282. The wear resistance of RS AlSi is better than that of KS282. |
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| Keywords: | hypereutectic Al-Si alloys rapid solidification powder hot extrusion properties |
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