本研究首先進行基材比較及選擇，再利用高速火焰熔射法塗佈碳化鎢塗層於鈦合金基板上，進行機械物理性質、耐腐蝕與熱傳導測試之實驗，並利用雷射雕刻機進行雷射再熔處理，期望能改進碳化鎢塗層之硬度、耐磨耗、耐腐蝕以及熱傳導等性能，使用不同的雷射功率參數進行調整後比較各性能之差異。研究中進行的性質測試包含:洛氏壓痕及維氏壓痕試驗機硬度測試、往復式磨粒磨耗測試、重量損失浸泡耐腐蝕測試以及熱傳導性測試。並且利用電子顯微鏡觀察再熔處理後之表面形貌差異，由表面之形貌觀測發現，使用適當的雷射功率進行再熔處理，對於塗層表面塗覆平整度及孔隙度都有顯著的提升。本研究顯示再熔處理對於硬度有明顯的效果，而不同雷射功率再熔後產生的硬度數值經壓痕硬度機測試，則以雷射功率30%硬度最佳，而雷射功率50%為最差。且再熔處理對於耐磨耗性能也有明顯的效果，在連續雷射模式下，雷射功率30%進行再熔處理能達到最佳的耐磨耗性能，而在耐腐蝕實驗結果中，發現碳化鎢塗層鍍膜明顯有助於提升Ti-6Al-4V基材的耐腐蝕性質，經過再熔處理後則是以雷射功率40%達到最佳的耐腐蝕狀態。由熱傳導係數實驗結果來看，經過噴覆碳化鎢塗層鍍膜後提升了Ti-6Al-4V整體的熱傳導性質。

In this study, the first step is the election of substrates and comparison, and then the tungsten carbide coating was applied to the titanium alloy substrate by the high-velocity flame spraying method, and the experiments on mechanical and physical properties, corrosion resistance, and thermal conductivity. Laser remelting is expected to improve the hardness, wear resistance, corrosion resistance, and thermal conductivity of tungsten carbide coatings. After adjusting with different laser power parameters, compare there with the differences in performance.

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