AZ91鎂合金濕砂模鑄造法之研究

Study of Green Sand Molds for making AZ91 Magnesium Alloy Castings

郭金國(Chin-Guo Kuo) ； 徐開鴻(Kai-Hung Hsu) ； 陳柏霖(Po-Lin Chen) ； 陳貞光(Jhewn-Kuang Chen)

《鑄造工程學刊》 35卷3期 (2009/09) Pp. 39-45

https://doi.org/10.29809/JTFS.200909.0005

摘要

近年來，鎂合金製程的零組件大量應用於包括3C產品、航空材料及運輸工具零組件，目前鎂合金零組件的製造方式大多以壓鑄法(Die Casting)為主，所以發展新的、更經濟的製程技術將是刻不容緩。本研究嘗試以濕砂模法澆鑄AZ91鎂合金，由於濕模砂中含有水氣，是必須添加抑制劑避免澆鑄過程中，鎂合金熔湯與濕模砂的水氣反應產生氧化鎂渣質及氫氣。故而本實驗將比較使用不同的抑制劑，包括十二烷基磺酸鈉、硼酸、硫磺、與氟硼酸鉀等對於AZ91鎂合金鑄件外觀之研究。實驗結果顯示添加硫磺，可得到較佳模砂性質且有效控制產生較好的金屬表面品質，添加氟硼酸鉀有較佳機械性質。

關鍵字

AZ91鎂合金 ； 濕砂模 ； 壓鑄 ； 抑制劑

並列摘要

Magnesium alloy parts have been widely utilized for applications including 3C part, aircraft and transportation components. Traditionally, magnesium alloy components are mostly manufactured by die-casting process. Development of new process technologies can be of interest from manufacturing cost point of view. The current study assesses the feasibility of using green sand mold to cast AZ91 magnesium alloy. Inhibitors are added in the green sand mold to avoid the moisture from reacting with the magnesium melt, resulting in forming magnesia slag and hydrogen formation. Inhibitors including sodium dodecyl sulfate, boric acid, sulfur, and potassium fluoroborate (KBF4) are added to compare the surface quality of AZ91 casting Experimental results show that adding sulfur in green sand obtained AZ91sand castings with satisfied surface quality and adding KBF4 in green sand produced sand castings with best mechanical properties.

並列關鍵字

AZ91 magnesium alloy ； green sand mold ； die casting ； inhibitor