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CVD coated insert Surface roughness AISI 304 austenitic stainless steel Taguchi approach ANOVA
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Performance evaluation of coating materials and process parameters optimization for surface quality during turning of AISI 304 austenitic stainless steel
Abstract
Austenitic stainless steels are a widely used group of stainless steels. Problems have been reported by users during machining
due to its low thermal conductivity, high work hardening, high strength, and high ductility. These made it difficult to machine
the materials. The aim of the present study is to investigate the influence of Pressure Vapour Deposition (PVD) and Chemical
Vapour Deposition (CVD) coated cemented carbide inserts on the surface quality of the work piece when turning on AISI 304
austenitic stainless steel work pieces, on computer numerical controlled (CNC) lathe. Taguchi’s Design of Experiments
approach (DOE) is used to analyze the effect of process parameters on surface roughness to obtain their optimal setting. The analysis of variance (ANOVA) is employed to analyze the influence of process parameters during turning. The results have shown that the improvement in average surface finish is obtained when machining with PVD coated insert (1.13 ìm).The nose radius is the most significant process parameter (62.88% contribution) when turning with PVD insert. The cutting speed is the most significant factor (37.84% contribution) when turning with CVD insert. Optimal ranges of surface roughness values are also predicted.
due to its low thermal conductivity, high work hardening, high strength, and high ductility. These made it difficult to machine
the materials. The aim of the present study is to investigate the influence of Pressure Vapour Deposition (PVD) and Chemical
Vapour Deposition (CVD) coated cemented carbide inserts on the surface quality of the work piece when turning on AISI 304
austenitic stainless steel work pieces, on computer numerical controlled (CNC) lathe. Taguchi’s Design of Experiments
approach (DOE) is used to analyze the effect of process parameters on surface roughness to obtain their optimal setting. The analysis of variance (ANOVA) is employed to analyze the influence of process parameters during turning. The results have shown that the improvement in average surface finish is obtained when machining with PVD coated insert (1.13 ìm).The nose radius is the most significant process parameter (62.88% contribution) when turning with PVD insert. The cutting speed is the most significant factor (37.84% contribution) when turning with CVD insert. Optimal ranges of surface roughness values are also predicted.
