KERF quality analysis and optimization in CO 2 laser cutting of ferritic stainless-steel SS 430

This study investigates the optimization of kerf quality in CO₂ laser cutting of ferritic stainless-steel SS 430 for both straight and curved profiles. Key process parameters, including laser power, cutting speed, oxygen pressure, stand-off distance, and focal position, were analyzed using a Taguchi L16 orthogonal array. Kerf quality was evaluated based on kerf width, kerf taper, and kerf deviation. Experimental results and ANOVA revealed that laser power and cutting speed are the most significant factors influencing kerf characteristics, with laser power having the highest contribution. Higher cutting speeds improved kerf quality by reducing thermal effects, while excessive power increased kerf width and taper. Curved profiles exhibited higher kerf deviation and taper due to non-uniform heat distribution. The study highlights the necessity of parameter optimization for different cutting geometries to achieve improved dimensional accuracy and cut quality in SS 430 sheet materials.