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凝固冷却速率对铸态A356铝合金固溶热处理的影响
  • ISSN号：1003-6326
  • 期刊名称：《中国有色金属学报：英文版》
  • 时间：0
  • 分类：TG146[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构：[1]西北工业大学凝固技术国家重点实验室,西安710072
  • 相关基金：Project（3102014KYJD002）supported by the Fundamental Research Funds for the Central Universities of China; Projects（50901059,51431008,51134011）supported by the National Natural Science Foundation of China; Project（2011CB610403）supported by the National Basic Research Program of China; Project（51125002）supported by the China National Funds for Distinguished Young Scientists; Project（JC20120223）supported by the Fundamental Research Fund of Northwestern Polytechnical University,China
作者： 杨长林[1], 李远兵[1], 党波[1], 吕贺宾[1], 刘峰[1]
关键词： A356铝合金, 固溶处理, 共晶硅, 冷却速率, A356 aluminum alloy, solution heat treatment, eutectic silicon, cooling rate
中文摘要：

通过对凝固冷却速度分别为96K/s和3K/s的阶梯模具制备的A356铝合金在540°C下进行固溶热处理,观察和分析该合金经过不同时间固溶处理后共晶硅形貌和拉伸性能的变化,研究凝固冷却速率对A356铝合金固溶热处理的影响。结果表明,凝固过程的冷速不仅能有效地改变合金中共晶硅的形貌,而且高的凝固冷速能缩短合金的固溶热处理时间、加速共晶硅形貌的演变和提高拉伸性能。而A356铝合金中共晶硅的断裂、球化和粗化行为在固溶热处理过程中通过先后两个阶段完成：首先主要是共晶硅的断裂和球化,随后是共晶硅的粗化。

英文摘要：

The effect of cooling rate of the solidification process on the following solution heat treatment of A356 alloy was investigated,where the cooling rates of 96 K/s and 3 K/s were obtained by the step-like metal mold.Then the eutectic silicon morphology evolution and tensile properties of the alloy samples were observed and analyzed after solution heat treatment at 540 °C for different time.The results show that the high cooling rate of the solidification process can not only reduce the solid solution heat treatment time to rapidly modify the eutectic silicon morphology,but also improve the alloy tensile properties.Specially,it is found that the disintegration,the spheroidization and coarsening of eutectic silicon of A356 alloy are completed during solution heat treatment through two stages,i.e.,at first,the disintegration and spheroidization of the eutectic silicon mainly takes place,then the eutectic silicon will coarsen.

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期刊信息
  • 《中国有色金属学报：英文版》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国有色金属学会
  • 主编：黄伯云
  • 地址：中国长沙中南大学
  • 邮编：410083
  • 邮箱：f-xsxb@csu.edu.cn
  • 电话：0731-88830949
  • 国际标准刊号：ISSN：1003-6326
  • 国内统一刊号：ISSN：43-1239/TG
  • 邮发代号:42-317
  • 获奖情况:
  • 国家“双百”期刊,第二届全国优秀科技期刊评比二等奖,中国有色金属工业总公司优秀科技期刊一等奖
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  • 被引量:1159