黃坤祥2006-07-252018-06-282006-07-252018-06-282001http://ntur.lib.ntu.edu.tw//handle/246246/12381粉末射出成形製程產品的尺寸穩定性較傳統粉末冶金來得差，主要的原因為此製程的步驟較多，而有較大的累積工差所導致。本實驗的主要目的即是在調整黏結劑配方與選擇粉末以改善MIM 工件的抗變形能力及尺寸穩定性方面的問題。在探討黏結劑配方方面，結果顯示以聚乙烯(LDPE)作為骨架黏結劑時，其工件較使用二元骨架黏結劑(PP/LDPE 、POM/LDPE 及HDPE/LDPE)有較佳的尺寸穩定性。而在比較不同特性的粉末對MIM 工件變形行為的影響方面，以球形粉作為基礎粉末時，其尺寸穩定性及抗變形能力均較不規則粉末差，但本實驗顯示此仍可藉由提高粉體固含量而得到改善。The MIM process has inferior dimensional control compared to the traditional powder metallurgy process due to the large amount of shrinkage and the complicated processes. The objective of this study was thus to improve the distortion and the dimensional stability of MIM compacts through binder design and powder selections. The results show that when LDPE is used as the backbone binder, better dimensional stability is attained than that using binary backbone binders, such as PP/LDPE, POM/LDPE, and HDPE/LDPE. The study also shows that the poor dimensional control of MIM compacts which are made from spherical powders can be improved by increasing the solid content.application/pdf65770 bytesapplication/pdfzh-TW國立臺灣大學材料科學與工程學研究所金屬粉末射出成形尺寸穩定性脫脂變形尺寸控制powder injection moldingdimensional controlbinder designdefctsreporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/12381/1/892216E002045.pdf