本論文探討Al2O3顆粒強化6061鋁基複合材料之高溫拉伸與室溫磨耗性質研究。 選取鋁合金6XXX系中6061鋁基複合材料添加10%Al2O3、15%Al2O3、20%Al2O3三種不同Al2O3含量為研究對象，經由冷軋延或熱軋延後，將部份材料做T6處理，以改善機械性質與耐磨耗性質。 並期望能提升6XXX系鋁合金之材料強度、耐磨耗性，並增加其應用的廣泛性。 實驗結果顯示： 經冷、熱軋延後的材料，其硬度會明顯提升。 再經T6處理後，硬度的提升更較於軋延後要高上許多。 高溫抗拉強度方面，經T6處理後的複合材料，其抗拉強度明顯高於未經T6處理的複合材料。 其高溫抗拉強度最高的為熱軋延80%,20%Al2O3/T6之複材，達330MPa；高溫抗拉強度最低為熱軋延80%,10%Al2O3之複材，值為185MPa。 耐磨耗性質方面，經T6處理後的複材，其耐磨耗性質明顯優於未經T6處理的複材。 未經T6處理的複材，其耐磨耗性質還差於6061-T6的耐磨耗性質。 而以磨耗頻率來看，30Hz下的試驗結果優於20Hz下所做的試驗。 實驗結果顯示，耐磨耗性最佳的為冷軋延80%,20%Al2O3/T6(30Hz)，其磨耗速率為1.396 mm3/Nm；耐磨耗性最差為冷軋延80%, 10%Al2O3 (20Hz)，其磨耗速率為3.716 mm3/Nm。 The article discusses the behaviors of Al2O3 particle reinforced 6061 aluminum matrix composite under high temperature tension and its wear resistance in room temperature. We choose 6061 aluminum composite with three different Al2O3 contents, 10%, 15% and 20%, respectively as the material of interest. We wish to improve the composite’s mechanical properties and wear resistance via cold rolling, hot rolling, and T6 heat treatment. We hope to extend the range of applications by increasing the 6XXX series aluminum alloy’s material strength and its wear resistance. Experimental results indicate that the material’s hardness increases after cold and hot rolling. The hardness rises even more after T6 heat treatment compared with rolling. In high temperature tension tests, the ultimate tensile strengths of specimens with T6 treatments were obviously higher than those without T6 treatment. The composite with 80% hot rolling, 10%Al2O3 with T6 treatment has the maximum tensile strength of 330MPa and the specimen with 80% hot rolling, 10%Al2O3 has the minimum tensile strength of 185MPa. In wear resistances, the wear resistances of the composites with T6 treatments are superior to the ones without treatment. The wear resistance of the specimens without T6 treatment is even weaker than that of the 6061-T6 bulk alloy. With respect to the wear frequency, the test results are better when the frequency is 30Hz than when it is 20Hz. Results show that the best wear resistance condition is under cold rolling 80%, 20%Al2O3/T6 (30Hz) which wear rate is 1.396 mm3/Nm. On the other hand, the worst wear resistance condition is under cold rolling 80%, 10%Al2O3 (20Hz) which the wear rate is 3.716 mm3/Nm.
