...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics >Use of experiment and an inverse method to study interface heat transfer during solidification in the investment casting process
【24h】

Use of experiment and an inverse method to study interface heat transfer during solidification in the investment casting process

机译：利用实验和逆方法研究熔模铸造过程中凝固过程中的界面传热

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 technique to determine the thermal boundary conditions existing during the solidification of metallic alloys in the investment casting process is presented. Quantitative information about these conditions is needed so that numerical models of heat transfer in this process produce accurate results. In particular, the variation of the boundary conditions both spatially and temporally must be known. The method used involves the application of a new inverse heat conduction method to thermal data recorded during laboratory experiments of aluminium alloy solidification in investment casting shell moulds. The resultant heat transfer coefficient for the alloy/mould interface is calculated. An experimental programme to determine requisite mould thermal properties was also undertaken. It was observed that there is significant variation of the alloy/mould heat transfer coefficient during solidification. It is found to be highly dependent on the alloy type and on the vertical position below the initial free surface of the liquid metal. The aluminium casting alloys used in this study were 413, A356, 319 (Aluminum Association designations), and commercially pure aluminium. These alloys have significantly different freezing ranges. In particular, it was found that alloys with a high freezing range solidify with rates of heat transfer to the mould which are very sensitive to metallostatic head. (C) 2000 Elsevier Science Inc. All rights reserved. [References: 20]
机译：提出了一种确定熔模铸造过程中金属合金凝固过程中存在的热边界条件的技术。需要有关这些条件的定量信息，以便在此过程中传热的数值模型可以得出准确的结果。特别地，必须知道边界条件在空间和时间上的变化。所使用的方法涉及对熔模铸造壳模中铝合金凝固的实验室实验期间记录的热数据应用新的逆导热方法。计算所得的合金/模具界面的传热系数。还进行了确定所需模具热性能的实验程序。观察到，凝固过程中合金/模具的传热系数有很大变化。发现它高度依赖于合金类型和液态金属初始自由表面下方的垂直位置。本研究中使用的铝铸造合金为413，A356、319（铝协会名称）和商业纯铝。这些合金的凝固范围明显不同。特别地，发现具有高凝固范围的合金随着对模具静压头非常敏感的热传递速率而凝固。 （C）2000 Elsevier Science Inc.保留所有权利。 [参考：20]

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