本研究規劃以奈秒雷射進行雷射表面紋理化(Laser Surface Texturing)製程於碳化鎢硬質合金 (WC-8Co)母材表面建構圖紋(點狀、十字型)特徵，後將碳化鎢子母材以真空硬焊方式接合(使用銀基焊料 60Ag-24Cu-24In-2Ti)，並探討在剪切強度測試下焊料能因滲入表面圖紋而產生釘扎效應(pinning effect)，提升碳化鎢焊接件的抗剪切強度。
　　實驗結果顯示，雷射表面紋理化製程可提高碳化鎢表面粗糙度值，當真空硬焊時焊料可成功滲入碳化鎢表面圖紋。不同持溫溫度會減少基材的硬度值，但改善金屬材料的焊接特性。在剪切強度測試中，發現由於母材為碳化鎢的狀態下，焊接介面強度已超過材料本身抗剪強度，因碳化鎢材料本身機械性質影響，雷射表面圖紋效果的影響無明顯改善。其中當焊接在持溫溫度830 ℃時可得到最大抗剪強度201.1 MPa。

In this study, the laser surface texturing process was performed(dot and cross pattern) on the surface of tungsten carbide (WC-8Co), and explore the shear strength test under the condition filler metal can infiltrate the surface pattern and produce pinning effect, enhance the brazing shear strength of tungsten carbide(WC-8Co).
　　Experimental results show laser surface texturing process can increase the surface roughness of tungsten carbide(WC-8Co). filler metal can be successfully infiltrated tungsten carbide surface pattern after vacuum brazing process. Different holding temperature will reduce the hardness of the substrate, but improve the brazing properties of materials. In the shear strength test, it was found that the strength of the brazed interface had exceeded the shear strength of the material itself. Due to the mechanical properties of the tungsten carbide material itself, the effect of the laser surface pattern has no significant improvement. Where the maximum shear strength is 201.1 MPa when brazed at a holding temperature of 830 ℃.

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