Experimental evaluation of cryogenic cooling's influence on surface roughness in monel milling.

This experimental study investigated the influence of a cryogenic machining method on surface roughness during milling of Monel material, compared to conventional dry machining. Cryogenic machining utilizes extremely low temperatures by spraying the cutting zone with cryogenic gases like CO2 or N2. This significantly reduces heat generation and friction, minimizing thermal deformation and tool wear that can degrade surface finish. 20 samples were machined under dry conditions as a control group, and another 20 using the cryogenic setup. Surface roughness (Ra) was measured and statistically analyzed. Results demonstrated a 46% improvement in surface finish with cryogenic machining over dry machining. The mean Ra was 1.0583 µm for dry machining versus 0.5663 µm for cryogenic (p<0.001). Cryogenic cooling's ability to enhance surface integrity shows promise for improving machinability and product quality, promoting sustainable manufacturing practices. Further research optimizing parameters like gas type, flow rate, and cutting conditions can unlock cryogenic machining's full potential for superior surface roughness. [ABSTRACT FROM AUTHOR]