| 离心铸造自生Zn—Al—Si表面复合材料的组织与性能 |
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| 引用本文： | 陈文周,王渠东,翟春泉,马春江,朱燕萍,何畏,丁文江. 离心铸造自生Zn—Al—Si表面复合材料的组织与性能[J]. 中国有色金属学报, 2001, 11(3): 416-423 |
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| 作者姓名： | 陈文周 王渠东 翟春泉 马春江 朱燕萍 何畏 丁文江 |
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| 作者单位： | 上海交通大学 |
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| 基金项目： | 国家自然科学基金资助项目(59901007);高等学校重点实验室访问学者基金资助项目 |
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| 摘 要： | 采用热膜金属型离心铸造Zn-27Al-5Si合金，获得了内层含大量初晶Si，外层有少量初晶Si，中层为细小共晶Si的表面复合材料，考察了复合材料的组织形貌和复合材料的,吧及模温和转速对组织的影响。结果，随着模温的提高，初晶Si、共晶Si和基体组织变得粗大；随着模转速的增加，初晶Si在内侧富集层厚度减小，初晶Si面积比增大。复合材料的内层由于聚集了大量初晶Si而具有较高的硬度和较优的耐磨性。复合材料的断裂方式为脆性断裂，含共晶Si的中层在断裂中比含块状初晶Si的内层经历了更多的塑性变形。
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| 关 键 词： | 离心铸造 Zn－Al－Si合金 自生表面复合材料 耐磨性 断裂 |
| 文章编号： | 1004-0609(2001)03-0416-08 |
| 修稿时间： | 2000-09-25 |
Microstructure and properties of in-situ Zn-Al-Si surfacecomposites prepared by centrifugal casting |
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| CHEN Wen-zhou,WANG Qu-dong,ZHAI Chun-quan,MA Chun-jiang,ZHU Yan-ping,HE Wei,DING Wen-jiang. Microstructure and properties of in-situ Zn-Al-Si surfacecomposites prepared by centrifugal casting[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(3): 416-423 |
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| Authors: | CHEN Wen-zhou WANG Qu-dong ZHAI Chun-quan MA Chun-jiang ZHU Yan-ping HE Wei DING Wen-jiang |
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| Abstract: | A new in situ Zn Al Si surface composites was fabricated by using centrifugal casting. A high volume fraction of primary Si particles in the inner layer was achieved. The formation mechanism of the gradient was discussed. The effect of technological parameters on the composites was investigated. Testing results show that the hardness and wear resistance of the composites depend mainly on the distribution of the primary silicon particles along radial direction. The inner layer of the composite shows the highest hardness and best wear properties. The fracture mode of the composites is primarily brittle. The inner layer of the composite exhibits more deformation than the inner layer during the fracture. [ |
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| Keywords: | centrifugal casting Zn-Al-Si alloy in-situ surface composites wear fracture |
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