• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>National Seminar on "Application of Chemical Engineering for Utilisation of Natural Resources (CHEMINAR-2001)", Feb 16-18, 2001, Bhubaneswar >A Novel Technique for Preparation of Leaded Aluminium Alloys in Small Scale Industries
【24h】

A Novel Technique for Preparation of Leaded Aluminium Alloys in Small Scale Industries

机译：小型工业中制备含铅铝合金的新技术

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A foundry technique has been developed which mixes and casts immiscible metallic melts. On solidification casting possesses uniform dispersion of one constituent into another. In coming future it may be popular In small scale industries. This technique is suitable enough to disperse heavy or light dispersoid phase into metallic matrix though both are insoluble in each other in solid and liquid states and form two separate immiscible layers in liquid state. In the present research work leaded aluminium alloys have been prepared by this technique. This foundry technique is a modified version of impeller mixing and bottom discharge chill casting technique. In this technique, immiscible aluminium lead melts were mixed in two stages Under continuous falling temperature and metallic system was vigorously agitated during solidification. A nondendritic structure of leaded aluminium alloy was obtained on solidification, whose morphology depended on the casting parameters. A large number of cylindrical castings were prepared under various agitation speeds, stirring times and pouring temperatures. Composition of the matrix alloy varied from commercial aluminium to Al-2 to 3wt% Cu, Al-2 to 11 wt% Si alloy whereas lead content mixed upto 30wt%. A Leitz Panphot optical microscope was employed to examine the microstructure of as cast leaded aluminium alloys. The lead inducted as interdendritic or structurally independent discrete particles and it did not form any visible additional micro-constituent in the cast structure of the alloy investigated.
机译：已经开发了一种混合和铸造不混溶的金属熔体的铸造技术。在凝固时，铸造具有一种成分均匀分散到另一种成分的功能。在不久的将来，它可能会在小规模行业中流行。该技术足以将重质或轻质分散相分散到金属基体中，尽管两者在固态和液态下都不互溶，并在液态下形成两个单独的不混溶层。在目前的研究工作中，已经通过这种技术制备了含铅铝合金。该铸造技术是叶轮混合和底部排放冷硬铸造技术的改进版本。在此技术中，不混溶的铝铅熔体在连续下降的温度下分两步混合，并且在凝固过程中剧烈搅拌金属体系。凝固得到铅铝合金的非枝晶组织，其形貌取决于铸造参数。在各种搅拌速度，搅拌时间和浇注温度下制备了大量的圆柱形铸件。基体合金的成分从商品铝到Al-2至3wt％的Cu，Al-2至11wt％的Si合金不等，而铅含量最高可达30wt％。使用Leitz Panphot光学显微镜检查铸铅铝合金的显微组织。铅以枝晶间或结构上独立的离散颗粒的形式引入，并且在所研究的合金的铸造结构中未形成任何可见的其他微成分。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号