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首页> 外文期刊>Journal of Materials Engineering and Performance >Integrated System of Thermal/Dimensional Analysis for Quality Control of Metallic Melt and Ductile Iron Casting Solidification
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Integrated System of Thermal/Dimensional Analysis for Quality Control of Metallic Melt and Ductile Iron Casting Solidification

机译：金属熔体质量控制热/尺寸分析集成系统，韧性铸铁凝固

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摘要

The main objective of the present work is to introduce a specific experimental instrument and technique for simultaneously evaluating cooling curves and expansion or contraction of cast metals during solidification. Contraction/expansion analysis illustrates the solidification parameters progression, according to the molten cast iron characteristics, which are dependent on the melting procedure and applied metallurgical treatments, mold media rigidity and thermal behavior [heat transfer parameters]. The first part of the paper summarizes the performance of this two-mold device. Its function is illustrated by representative shrinkage tendency results in ductile cast iron as affected by mold rigidity (green sand and furan resin sand molds) and inoculant type (FeSi-based alloys), published in part previously. The second part of the paper illustrates an application of this equipment adapted for commercial foundry use. It conducts thermal analysis and volume change measurements in a single ceramic cup so that mold media as well as solidification conditions are constants, with cast iron quality as the variable. Experiments compared gray and ductile cast iron solidification patterns. Gray iron castings are characterized by higher undercooling at the beginning and at the end of solidification and lower graphitic expansion. Typically, ductile cast iron exhibits higher graphitic, initial expansion, conducive for shrinkage formation in soft molds.
机译：本作工作的主要目的是引入特定的实验仪器和技术，用于在凝固过程中同时评估铸造金属的冷却曲线和膨胀或收缩。收缩/膨胀分析说明了熔融铸铁特性的凝固参数进展，这取决于熔化程序和冶金处理，模具介质刚性和热行为[传热参数]。本文的第一部分总结了这款两模设备的性能。其功能通过代表性收缩趋势来说明，该铸铁是由模具刚性（绿色砂和呋喃树脂砂模具）和接种型（Fesi基合金）的影响，部分原先的延性铸铁。本文的第二部分示出了适用于商业铸造使用的该设备的应用。它在单个陶瓷杯中进行热分析和体积变化测量，使模具介质以及凝固条件是常数，铸造铁质量作为变量。实验比较灰色和延性铸铁凝固模式。灰色铁铸件的特征在于在凝固开始和较低的石墨膨胀结束时较高过冷却。通常，延性铸铁表现出更高的石墨，初始膨胀，有利于软模具中的收缩形成。

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