Abstract
In this research, CO2 laser cutting process is used to manufacturing miniature gears of stainless steel 304. The aim of this research is to study the influence of laser process parameters i.e. laser power, gas flow pressure, laser scan rate and focal position on surface quality of the laser machined miniature gears. The field emission scan electron microscope (FESEM) is used to analyse the different regimes of machined surface and white light spectroscope for 3D surface profile mapping. The laser power is the predominant input factor for surface wear and it was in the form of surface oxides at high voltage of 2500W. In addition to surface analysis, the effect of laser heat source over the gear profile is also studied. The transformation in the microstructure of the gears is observed with metallurgical microscope following standards. The effect of heat source has produced twin in grain structure and lead to surface hardness. Optimal laser power of 2000 W with a scan rate of 2mm/min has produced best gear profile than other combinations.