Machinability studies on EN47 spring steel by optimization technique during dry and wet condition

Abstract

EN47 Spring steel is a hard material having a hardness of 45-48HRC. EN47 material possesses low thermal conductivity and suitable for oil hardening and tempering. Hardened spring steel offers excellent toughness and shock resistance, suitable alloy for automobile applications. In this experimental study, to optimize the process parameters such as cutting speed (Vc), feed rate (f) and depth of cut (ap). In order to minimize the surface roughness (Ra), tool tip temperature (T) and tangential cutting force (Fz) during turning of spring steel by coated tungsten carbide cutting tool insert under dry and wet condition. Experiments are conducted based on the design of experiment using full factorial design (33: three factors and three levels) L27 orthogonal array. From the experimental work, result reveals that surface roughness (Ra) influenced by (Vc and f). Tangential cutting force (Fz) influenced by (f and ap). Tool tip temperature influenced by (Vc and ap). The comparison have been done between dry and wet condition and the results reveal that under wet condition surface roughness (Ra) and tool tip temperature (T) is reduced by 22.59% and 21.29% respectively. Less difference was observed in cutting force (Fz) during dry and wet machining. International Journal of Modern Manufacturing Technologies.