本研究計畫探討特殊鋁基複合材料製程研究。選取鋁合金6XXX系中6061鋁基複合材料添加10wt%Al2O3、15wt%Al2O3、20wt%Al2O3三種不同Al2O3含量為研究對象，經由不同條件的T6熱處理程序並進行機械性質、磨耗試驗及顯微組織觀察，探討添加Al2O3顆粒對其材料性質之影響。並期望其能提升6XXX系鋁合金之材料強度並增加其應用的廣泛性。 由實驗結果顯示：添加Al2O3顆粒之6061鋁基複合材料經T6處理(510℃固溶處理4hr+175℃時效處理8hr)後，在冷輥軋20%下，三種不同Al2O3含量6061鋁基復材的抗拉強度在340MPa以上(添加10wt% Al2O3=>343 MPa、15wt%Al2O3=>352MPa、20wt%Al2O3=>356MPa)且延伸率在6%以上(添加10wt%Al2O3=>7.4%、15wt%Al2O3=>6.4%、20wt%Al2O3 =>7.4%)。 在磨耗試驗部份6061鋁基複材經軋延80%後比之未經軋延6061鋁基擠製材，其耐磨耗性有明顯的改善，輥軋所產生之加工硬化對材料的耐磨耗性有所影響。若外加T6處理，熱輥軋10wt%Al2O3與15wt%Al2O3之6061鋁基複材耐磨耗性有略微改善而20wt%Al2O3之6061鋁基複材則改善較多。相同輥軋率80%，經冷輥軋的耐磨耗性在Al2O3顆粒含量10wt%Al2O3與15wt% Al2O3之6061鋁基複材比熱 軋延改善較多，但20wt%Al2O3之6061鋁基複材則沒有改善且與熱軋延之耐磨耗性相當，研判可能是因為經熱軋延80%的20wt%Al2O3 /6061鋁基複材在磨耗時，磨屑沒被排除接著又因磨耗時摩擦所產生的熱能，將磨屑與試片表面熔接在一起，導致重量損失有誤差因而產生此結果。本研究中磨耗性在參數為冷輥軋80%後經T6處理下之添加Al2O3顆粒6061鋁基複材(添加10wt%Al2O3=>1.03×10-7 mm3/ Nm、15wt%Al2O3=>0.66×10-7 mm3/Nm、20wt%Al2O3 =>0.6×10-7 mm3/ Nm)為最佳。 There are 0~20 wt% Al2O3 particle reinforced 6061 Al matrix composite in our research. They were rolling reductions of 20, 40, 60, 80% rolling process and artificial aging at temperature 175℃ that in order to discuss precipitation affect in the materials, followed by an extrusion for plates. Furthermore, the strain rate effects on the tensile properties and wear properties are discussed. For the four tested materials: unreinforced 6061-T6 aluminum alloy, 10wt%, 15wt%, and 20wt% Al2O3 /6061-T6 composites, the cool rolling 20% of tensile strength over 340MPa and strain rate over 6%. The wear properties and wear mechanisms of alumina particulate (Al2O3) reinforced 6061-T6 aluminum alloy matrix composites were investigated. Composites of different alumna contents (10, 15, 20wt%) were tested for their at room temperature with an Schwingung Reibung Verschleiss (SRV) oscillation friction wear tester under 25N load. the results show that the wear volume of different composite specimens decreases with increasing alumina particulate contents, it can be modeled by the inverse rule of mixtures. The wear resistance of the composite is better than the unreinforced alloy.
