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題 名 | 新型旋轉攪拌精煉技術對鎂合金熔湯除氣精煉的影響=Effect of Novel Rotating Impeller Degassing Technique on Purging and Degassing of Molten Magnesium Alloy |
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作 者 | 曹龍泉; 鄭德賢; 馮立平; | 書刊名 | 鑄造工程學刊 |
卷 期 | 38:1=152 2012.03[民101.03] |
頁 次 | 頁32-38 |
分類號 | 472.7 |
關鍵詞 | 鎂合金; 旋轉攪拌精煉技術; 水模擬實驗; Magnesium alloy; Rotating impeller degassing; Water simulation method; |
語 文 | 中文(Chinese) |
中文摘要 | 以旋轉攪拌精煉技術的數學模型為基礎,利用水模擬實驗來進行新型轉頭、轉速、氣體流量對除氣效率之氣泡大小(mm)及氣泡擴散分佈面積(%)的影響。研究結果顯示:新型轉頭能有效地產生噴射流及剪切作用,使除氣氣泡微細化至約2mm,並增加除氣氣泡與鎂合金熔湯接觸的表面積比,並且改善除氫過程的擴散動力學關係,進而提高除氫效果。在氬氣流量2 L/min及轉速500rpm優化條件下,模擬計算AZ91鎂合金熔湯經過連續除氣13分鐘下,能使除氣效率達到100%。 |
英文摘要 | Based on the mathematical model for the degassing processing by rotating impeller degassing (RID), both bubble size and bubble spread area were analyzed experimentally by the using of a water model. Effects of the rotation speed and the gas flow rate on the degassing efficiency have been investigated by means of water simulation. The results show that the novel rotating impeller head is effective to producing efflux, shear and decreasing the gas bubble size to 2 mm, thus, the contact surface area between the melt and the gas is increased and the kinetic condition of degassing for hydrogen is improved. Furthermore, by the optimal processing parameters of the RID process under conditions of rotational speed v = 500 rpm/min, Ar gas flow rate q = 2 L/min and the degassing time t = 13 min, the degassing efficiency of simulation of molten AZ91 magnesium alloy can reach 100%. |
本系統中英文摘要資訊取自各篇刊載內容。