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首页> 外文期刊>International Journal Cast Metals Research >Potential use of continuous cooling curves for prediction of solidification structure of nodular iron casting sections
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Potential use of continuous cooling curves for prediction of solidification structure of nodular iron casting sections

机译：连续冷却曲线在预测球墨铸铁件凝固组织中的潜在应用

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This article describes an evaluation procedure to forecast the structure resulting from a certain reaction which uses a thermal analysis technique based upon cooling curves, taken from the geometrical centre of casting sections, in order toevaluate the heat released during the transformation reaction. The method has been applied to the study of the solidification of some nodular, lamelar and ledeburitic melts; special emphasis has been given to the study of the solidification of nodularcast irons.The mathematical model, already described by some authors, allows the evaluation of the heat of solidification and the error associated. Three types of test castings have been used: a step casting, with decreasing section thickness, isolated sections with the same thickness as the different sections of the step casting and, finally, a TecTip cartridge.The results obtained let us suggest that the neutral body has to be generated very wisely in order to avoid the influence of the sharp transition, which occurs at the end of the solidification in the first derivative of the cooling curve of the realsection, on the value calculated for the heat of solidification.
机译：本文介绍了一种评估程序，该程序用于预测某个反应产生的结构，该过程使用基于冷却曲线的热分析技术（从浇铸段的几何中心获取）来评估转化反应过程中释放的热量。该方法已被用于一些结节状，层状和疏松状熔体的凝固研究。球墨铸铁的凝固研究得到了特别的重视。一些作者已经描述了该数学模型，该模型可以评估凝固热和相关的误差。使用了三种类型的测试铸件：截面厚度减小的阶梯铸件，与阶梯铸件的不同截面厚度相同的孤立铸件，最后是TecTip弹药筒。所得结果表明我们是中性体为避免凝固时冷却曲线的一阶导数在凝固结束时发生的急剧转变对凝固热计算值的影响，必须非常明智地生成。

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