Multi-objective optimization of cutting parameters for dry and wet drilling of AISI 340 25-20 steel:Towards Eco-Friendly Machining

The machining of stainless steels and pollution reduction generated by coolants and emulsions are of great importance in industry. Several investigations have been conducted to master their machinability due to difficulties encountered in tool wear, chip morphology, and cutting resistance. Additionally, compliance with environmental regulations has become very strict, presenting an extra cost for machining. This study aims to investigate both dry and wet drilling of AISI 304 25-20 steel using a carbide insert drill, with the primary goal of optimizing cutting conditions such as cutting speed (Vc) and feed rate per revolution (f) to achieve low cutting power and minimal burr height. Secondly, a multi-objective optimization is pursued to minimize both cutting power and burr height; finally, a comparison of the two processes is made. Experiments were conducted based on the design of the experiment methodology and analysed statistically using the ANOVA method. The models provide practical recommendations for reducing production costs and improving the quality of finished products.