Optimizing the Mechanical Properties of Thin-Wall Ductile Iron Castings
Optimizing the Mechanical Properties of Thin-Wall Ductile Iron Castings
复制标题
优化薄壁球墨铸铁件的机械性能
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Javaid
中科院分区：
文献类型：
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作者：
C. Labrecque;M. Gagné;A. Javaid
过去，铸造厂生产铸态、无碳化物、薄壁（2-3 mm）零件的能力限制了球墨铸铁在轻型汽车部件中的应用。近十年来，球墨铸铁行业投入了大量的资金和时间来开发一种能够制造这种铸件的技术。薄壁铸件生产的一个关键参数是将球数控制在500-700的范围内，对于该范围，机械性能和显微组织是最佳的。这是通过控制零件的冷却速度和优化孕育过程来实现的。本文介绍了在实验铸造厂中进行的研究结果，其中研究了下列参数：（1）在结晶器中加入保温材料以控制结晶器/金属界面的热交换，然后控制过冷度以避免碳化物的形成;（2）选择适当的孕育方法以控制球数在选定的范围内; iii）确定优化性能和成本所需的最小硅含量。
The use of Ductile Iron for light weight automotive components has been limited in the past by the capability of the foundries to produce as-cast, carbide free, thin wall (2-3 mm) parts. For almost a decade, the Ductile Iron industry has invested significant amounts of money and time to develop a technology that would allow the manufacture of such castings. A key parameter for the production of thin-wall casting is to control the nodule count in a range of 500-700 for which the mechanical properties and the microstructure are optimum. This is obtained by controlling the cooling rate of the parts and by optimizing the inoculation process. This paper presents the results of a study carried out in an experimental foundry in which the following parameters were studied: I) optimization of the addition of an insulating material to the mould to control the heat exchange at the mould/metal interface and then, the undercooling level to avoid carbide formation; ii) selection of the appropriate inoculation practice to control the nodule count in the selected range; iii) to determine a minimum silicon content required to optimize properties and cost.