本論文係由中山科學研究院提供之鑄造Al2O3/6061及SiC/6061鋁基複合材料作為研究對象。Al2O3/6061鋁基複合材料分別進行350℃熱軋延量80%、冷軋延量80%、冷軋延量60%後再經過T6熱處理 (固溶處理530℃/2.5h，時效處理160℃/18h)；SiC/6061鋁基複合材料分別進行20%、40%、60%、80%四種不同之350℃熱軋延量後再經過T6熱處理後，探討不同軋延加工量及T6處理後對此兩種鋁基複合材料磨耗特性之影響。同時，使用掃描式電子顯微鏡觀察拉伸破斷面與磨秏後表面之破壞形態。其乾磨秏試驗條件為荷重25N、往復行程1mm、頻率20Hz時間45分鐘、總磨耗距離108m以及環境溫度室溫及150℃下。 實驗結果顯示，Al2O3/6061及SiC/6061鋁基複合材料經T6處理後硬度及強度皆有明顯的提升。Al2O3/6061鋁基複合材料之磨耗率隨氧化鋁顆粒含量的增加而下降。並且發現20wt%Al2O3/6061鋁基複合材料經過熱軋延80%與T6處理後有最佳的耐磨耗性。鋁基複材高溫150℃磨耗後表面形態主要為黏著及疲勞現象。 This thesis concludes the wear properties of the casted Al2O3/6061 and SiC/6061 aluminum matrix composites which are provided by the Chungshan Institute of Science and Technology. After different rolling reductions, the composites were T6-heat treated (530℃ solid solution treatment for 2.5 hrs; aged at 160℃ for 18 hrs); Dry wearing tests results are reported. Moreover, the tensile fracture surfaces and morphologies of worn surfaces were observed by SEM. The wear testing parameters include applied loads of 25N; reciprocating stroke of 1 mm; reciprocating frequency of 20 Hz for 45 min; total sliding distance of 108 m; and the test temperatures were at room temperature and 150℃. After T6 treatment, the hardness of Al2O3/6061 and SiC/6061 aluminum matrix composites’ increase obviously. The wear rates reduce with the increase of Al2O3 particles inclusions. The Al2O3/6061 aluminum-matrix composites with 20% Al2O3 particles inclusions with 80% hot rolling and T6 treatment has the best dry wear resistance. We observed the adhesion and fatigue phenomenon from the primary worn surface morphology of the composites’.
