Optimization of Cutting Parameters in Dry Turning of AISI 4340 Hardened Alloy Steel with Multilayered Coated Carbide Tool

Abstract

AISI 4340 has been widely used in automobile and aerospace industries due to their adequate mechanical and chemical properties. This paper investigated the effect of cutting parameters such as cutting speed, feed and depth of cut on cutting force and cutting temperature in dry turning of AISI 4340 hardened alloy steel with a multilayer coated carbide tool. The optimization of cutting conditions is highly important that helps the manufacturing technocrats in process planning as the economy of machining operation defines the competitive advantage. The study investigated the optimum cutting parameters that could produce a significant reduction in cutting temperature and cutting forces leading to improve tool life as well as the surface finish of the machined surface in hard turning. Taguchi’s L9 orthogonal array was used to design the experiment and analysis of variance (ANOVA) was performed to identify the significant factors affecting the cutting forces and cutting temperatures. The experimental results showed that the feed is the most influencing factor on cutting force and cutting temperature followed by the depth of cut and cutting speed.