本文探討氬銲的方式，在6061鋁合金表面被覆一層含TiC的合金粉末，用以改善其機械性質與提升6061鋁合金的耐磨耗能力。並搭配田口式參數設計方法改變製程參數與粉末含量的比例，尋找影響被覆層硬度及耐磨耗的因子，作為改善6061鋁合金表面硬度及耐磨耗性能的依據。並且針對各組被覆層內的顯微組織及磨耗表面形態加以評估，進行有系統的探討。
本實驗使用試誤法，嘗試出對於6061鋁合金的被覆製程，研製出表層蓋鋁法的方式。並搭配田口實驗計劃法，而實驗結果顯示，經田口參數設計法得到影響被覆層硬度最主要的參數為混合粉末、混合粉末鋁含量與運行速度；而影響耐磨耗特性最主要的參數為混合粉末、銲接電流與運行速度。在被覆層中添加的元素特性，對於被覆層硬度與耐磨耗性能具有很大的影響性，而銲接電流與運行速度產生的入熱量，也會影響被覆層的微觀組織與彼此的結合性。

In this thesis, the TiC particles were clad on 6061 alminum alloy by the gas tungsten arc welding(GTAW) method to investigate improvement of wear resistance. Besides, the factors which influenced hardness and wear performance of the clad layers were determined by the Taguchi parameter design method. The cladding-process parameters for improving the hardness and wear resistance of 6061 aluminum alloy surface were changed according to Taguchi parameter design method.
In addition, trial and error method was applied for the cladding processes on 6061 aluminum alloy and a surface-covered aluminum method was developed. According to the experimental results by Taguchi method, which showed that the hardness of the clad layers were influenced the most by mixed powders, aluminum content, and travelling speed ; the wear characteristics were determined by mixed powders, welding current and travelling speed most. The characteristics of the added particles presented large effects on the hardness and abrasion resistance of the clad layers. Additionally, input heat determined by the welding current and travelling speed affected the microstructure of the clad layers.

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