模內法接種處理與過濾網對於呋喃樹脂模延性鑄鐵品質之影響

The Effects of In-mold Process Inoculation Treatment and Filter on the Quality of Furan Resin Mold Ductile Cast Iron

楊榮顯(Rong-Shean Yang) ； 陳皇旭(Huang-Hsu Chen)

《鑄造工程學刊》 34卷2期 (2008/06) Pp. 28-39

https://doi.org/10.29809/JTFS.200806.0004

摘要

本研究之主要目的即在探討以模內法製作呋喃樹脂模延性鑄鐵時，過濾網的孔徑與接種處理對延性鑄鐵之機械性質(抗拉強度、延性等)與金相顯微組織(球化率、球墨數、基地組織等)的影響。
研究結果顯示：(1)採用過濾網及孔徑較小的過濾網可以使介在物含量減小，並且隨著介在物含量之減少，金相顯微組織及機械性質也獲得提升。因此，建議應採用過濾網而且孔徑較小(φ1.5 mm)之過濾網為佳。經由SEM-EDS觀察可知，介在物之主要組成為氧化物及碳化物。(2)接種處理後的延性鑄鐵其球化率、球墨數、球墨粒徑、肥粒鐵含量皆有明顯之提高，亦使抗拉強度、延性、韌性升高而硬度僅些微下降。SEM照片之解析印證接種處理有細化波來鐵組織與增加肥粒鐵晶粒大小號數的效果，這些都可從機械性質的提升得到證明。

關鍵字

模內法 ； 延性鑄鐵 ； 過濾網 ； 接種處理 ； 機械性質 ； 金相顯微組織

並列摘要

The objective of this research is to focus on the manufacturing of furan resin mold ductile cast iron by using the In-mold Process. The effects of filter apertures and inoculation treatment on the mechanical properties (tensile strength, ductility, etc.,) and metallographic microstructures (nodularity, nodule count, matrix etc.,) of the ductile cast iron were investigated in this research. The results of this study indicate：(1) The use of finer filter (φ1.5 mm) has reduced the inclusion content, and the metallographic microstructures and mechanical properties have an improvement to some extent. So it is suggested to use the finer filter (φ1.5 mm). SEM-EDS analyses show that oxide and carbide are major compositions of the inclusion in ductile iron.(2) The nodularity, nodule count, diameter of graphite, and ferrite content of the ductile cast iron are obviously improved after inoculation treatment, also it has an increase in the ductility, and toughness while it has the decrease in hardness. SEM analyses show that inoculation treatment can thin pearlite structures and increase ferrite grain size number. All these can be proved from the improvement of mechanical properties.

並列關鍵字

In-mold process ； Ductile iron ； Filter ； Inoculation treatment ； Mechanical properties ； Metallographic microstructure