The purpose of this paper was to analyze the process factors affecting the occurrence of lustrous carbon defects in ductile cast iron castings when using the lost-foam casting (LFC) method. This phenomenon results in creating raw surface defects, which sometimes may even lead to cast iron scrapping. A series of trial melting batches were carried out for variable process assumptions. The analysis was performed to reflect, to the greatest extent possible, real foundry production conditions. Industrial tests were performed in Odlewnia Rafamet Sp. z o.o., Kuźnia Raciborska, Poland. The polystyrene patterns created by gluing components together, used in the tests, met the requirements of the high-tech lost-foam casting (LFC) process. The performed analysis allowed the obtaining of lustrous carbon defects in test castings as well as the determination of the process parameters with the highest impact on lustrous carbon inclusions in ductile iron castings. The test results were used to eliminate the possibility of creating a defect and thus directly improve the efficiency of the lost-foam casting (LFC) process used in the foundry.

中文翻译：

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消失模铸造（LFC）方法生产球墨铸铁过程中工艺因素对产生缺陷（主要是光泽碳）的影响

本文的目的是分析使用失泡铸造（LFC）方法影响球墨铸铁铸件中光泽碳缺陷发生的过程因素。这种现象会导致产生原始的表面缺陷，有时甚至会导致铸铁报废。针对可变的工艺假设进行了一系列的试验熔炼批次。进行分析以最大程度地反映实际的铸造生产条件。工业测试在Odlewnia Rafamet Sp。进行。z oo，库纳尼亚·拉奇博尔斯卡，波兰。在测试中使用的通过将组件粘合在一起而创建的聚苯乙烯模型满足了高科技消失模铸造（LFC）工艺的要求。进行的分析允许获得测试铸件中的光泽碳缺陷，并确定对球墨铸铁中的光泽碳夹杂物影响最大的工艺参数。测试结果用于消除产生缺陷的可能性，从而直接提高铸造厂使用的消失模铸造（LFC）工艺的效率。