- 期刊
擠製參數對6463鋁合金有縫管擠製接合效應之影響
Influence of Extrusion Variables on Bonding Effect of Hollow Shaped 6463 Aluminum Alloy
摘要
本論文是以四道扇形及兩道半月形之平面分流模擠製6463鋁合金有縫長方形空心管，探討擠製參數對有縫管焊合效應的影響。實驗結果顯示，擠製參數及分流模設計會影響擠製過程所需最大擠製壓力，因而造成有縫管擠製不同的焊合效果。由金相顯微結構的觀察，焊合狀態可區分為無焊合縫、散洞狀、細線狀及粗條狀等四種。在使用四孔分流模擠製並經T6熱處理的擠件中，低擠速擠件之焊合效果較佳，在較高擠速的擠件中，則出現較差的焊合效應。在T5熱處理的狀態下，低擠速之擠件反而形成較明顯的焊合缺陷，在高擠速的條件下，則可以達到較佳的焊合狀態。在使用兩孔分流模的擠件中，由於所需最大擠製壓力較低，無法達到有效的固態接合作用，不論在高擠速或低擠速下都會出現焊合不佳的情況。
並列摘要
Rectangular hollow section of 6463 aluminum alloy was extruded by using porthole dies with four fan-shaped and two half-moon-shaped feederports to explore the influence of the extrusion parameters on the bonding effect. The experimental results showed that the extrusion parameters and the design of the feederports would influence the maximum extrusion pressure which resulted in different bonding effect. The bonding status could be categorized into well bonded scattered holes, thin line and strip. Under the T6 heat treated condition, the extruded sections showed better bonding effects by means of a lower extrusion speed and a feeder die with four feederports. On the contrary, under the T5 condition, less serious bonding defects were found while utilizing a higher extrusion speed. The maximum extrusion pressures were not high enough to result in good solid bonding in the welding chamber by using a die with two feederports. Therefore, the bonding defects in the extruded sections could be notably observed no matter of extrusion with a higher or a lower extrusion speed.