Surface roughness of super duplex stainless steel SAF 2507 during turning

Abstract EN

This paper presents surface roughness variation with cutting speed and feed rate of 20mm diameter heat treated super duplex stainless steel SAF 2507.

The material heat treated at 800*C for 1 hour ,and dry turning test were conducted at two different cutting speed 12.5m/min and 22.5m/min and five different feed rates (0.06,0.08,0.1,0.12 and 0.14 mm/rev) with constant depth of cut 0.25 mm.

The surface roughness of machined surface of heat treated material was found and the results were compared with that of as received condition.

Compared to as received material, heat treatment at 800®C for one hour reduces the surface roughness at lower cutting speed and lower feed rate but this approach inverted at higher cutting speed and lower feed rate.

Surface roughness of heat treated SDSS SAF 2507 is higher than that of as received condition for all feed rates during turning with higher cutting speed 22.5m/min.

Lower surface roughness can be obtained in as received condition during machining with higher cutting speed and lower feed rate.