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題名 | 高表面品質AA3004電子鍋料開發=Development of High Surface Quality AA3004 Stock for Electric Rice Cookers |
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作者 | 石漢正; 黃勝俊; | 書刊名 | 鑛冶 |
卷期 | 42:1=161 1998.03[民87.03] |
頁次 | 頁33-51 |
分類號 | 472.5 |
關鍵詞 | 實驗計畫法; 白色條紋; 無析出帶; 成份梯度; 原始晶出相; 二次析出相; 樹枝臂間距; Experimental design methods; White streak; Precipitate-free zone; PFZ; Composition gradient; Primary crystalline phase; Secondary phase; Dendrite arm spacing; |
語文 | 中文(Chinese) |
中文摘要 | 電子鍋外表如具有白色條紋,則由於美觀不佳,將大為減低顧客的購買意願;針對這個問題,本研究運用實驗計劃法及一系列顯微分析,已成功地找出最佳製程並應用於現場量產,使其獲致圓滿解決。研究結果顯示,白色條紋之產生,主要係由於伴隨著網狀鑄造晶出相之形成,於其周圍將衍生無析出帶;這些帶在軋延過程中拉長,且於高溫酸洗時優先腐蝕所致。基於上述原理,本研究在治標方面,首先刊用高溫均質化處理將原始晶出相予以球化,並消除其周遭的無析出帶,隨後再施予第二段低溫均質化處理使二次相廣泛地析出於基地內,以減少其顧熱軋途中之不均勻析出;而在治本方面,則經由調整合金元素含量,並增加鋁胚凝固速率,以加強均質化之效果;如此雙管齊下,終使白色條紋得以徹底消除,而導致高表面品質電子鍋料的開發成功。 |
英文摘要 | Electric rice cookers with white streaks would not be accepted pleasurably customers due to poor appearance. The white streaks were produced on the surfaces of AA3004 aluminum sheets etched in sulfuric acid at a high temperautre. In this study, an optimal process for solving this problem has been found out and used for the mass production at plant by aid of experimental design methods and microscopic analyses. The results of study revealed that the white streaks resulted from precipitate-free zones (PFZs), which were induced around a network of crystalline phases during casting, then elongated during rolling, and preferentially attacked during pickling. Based on the above mechanism, a high temperature homogenization treatment was first performed to spheroidize primary crystalline phases and also eliminate PFZs. A low temperature homogenization treatment was subsequently performed to promote uniform preciptation of secondary phases throughout the matrix to prevent them from non-uniform precipitation during hot-rolling. Furthermore, alloy contents was adjusted and the solidification rate of slabs was increased to enhance the effect of homogenization. As a result, high surface quality stocks for electric rice cookers were successfully developed because white streaks were thoroughly eliminated. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。