Pulsed CO2 Laser- TIG Arc Hybrid Lap Welding of Magnesium Alloy AZ31B

[[abstract]]隨著產品輕薄趨勢的來臨，加上雷射銲接普遍應用於精密工業，近年來工業界使用鎂合金日益增加，如自行車、汽車、航太、3C產品等。現在許多工業為了追求更高品質製造，捨棄傳統銲接改用雷射銲接製程。目前，有些高功率CO2雷射已具有部分脈衝式Nd:YAG之功能，而且其輸出功率更高出數倍至數十倍、成本亦較低廉，且加工參數較Nd:YAG簡單。鎂合金AZ31B的雷射疊銲接製程面臨表面反射率高而不易吸收雷射能量，本實驗以脈衝式CO2雷射搭配TIG電弧混合疊銲接鎂合金AZ31B，TIG電弧可幫助提升銲件對雷射光的吸收率，雷射光可穩定TIG電弧，兩者相輔的情況下，提高了銲接速度及機械性質之強度。機械性質試驗結果再利用品質特性回應圖，由回應圖趨勢顯示出哪些控制因子對製程具有較大之影響。[[abstract]]As products are becoming more portable and laser welding has been widely applied to the precision industry, the use of magnesium alloy has been more extensively on bicycles, automobiles, aeronautics, 3C products and more. To achieve for higher quality in manufacturing, many industries have replaced traditional welding by laser welding. Presently, some high-power CO2 laser has some pulse Nd:YAG functions and its output power is several or several decuples higher, with lower cost and processing parameters simpler than the Nd:YAG. The laser lap welding with magnesium alloy AZ31B has high reflectivity on the surface and is difficult to absorption laser energy, This experiment used pulsed CO2 Laser- TIG Arc Hybrid Lap Welding of Magnesium Alloy AZ31B, In advantageous conditions, the TIG Arc may help the enhanced welding to the laser beam absorptivity and the laser beam may stability the TIG Arc. complement each other, boost the welding speed and the property of mechanical intensity. The mechanical properties experiment results uses the performance characteristic response chart again, which discovers to control the factor to have a more tremendous influence to the system regulation