關鍵字：7003、SUS630、17-4PH、鋁合金、不銹鋼、異質金屬銲接 ;ABSTRACT Because of the high specific strength and good corrosion aluminum alloys and stainless steels have been used extensively since period of energy crises. It is very helpful in industry that integrating different materials characteristic in used. Therefore, the welding of heterogeneous metals have been valued. The purpose of this research was to study the weldability of aluminum alloys and stainless steels under fiber laser welding. The base metals used were AL7003 and SUS630 (17-4PH). A series of experiments including tensile test, microstructure was observed and distribution of alloy elements within the fusion zone was analyzed by scanning electron microscope. The experimental results indicate that the elements distribution of Al and Fe were mixed sufficiently, it sound weld metals of welding strength was obtained by using main welding power of 60 watt and side welding power of 60 watt.
