Optimization of process parameters of medium carbon steel joints joined by MIG welding using Taguchi method

Abstract

In this study, related to getting better obtain to the mechanical properties of medium carbon steel joints joined by MIG welding method using the Taguchi method welding groove were optimized. Grove angle (60ᵒ, 75ᵒ and 90ᵒ), current (100 A, 110 A and 120 A) and voltage (25 V, 30 V and 35 V) were used as welding parameters. The results showed that the highest tensile strength as 597.963 MPa was obtained at groove angle 90ᵒ, current 120 A and voltage 30 V, the lowest tensile strength was obtained as 395.125 MPa. The highest elongation as 11.551% was obtained at groove angle 90ᵒ, current 120 A and voltage 30 V, the lowest elongation was obtained as 8.354%. In addition, it was observed that the changes in current and voltage values significantly affect the tensile strength and elongation values of the joints. According to ANOVA analyses, the most effective parameter on average tensile strength and elongation were determined to be groove angle (62.75% and 75.58%, respectively). Based on S/N ratios, the optimal parameters for average tensile strength and elongation were determined A3B3C2 factors.

Keywords

• Optimization
• Taguchi method
• ANOVA
• MIG welding
• Tensile test
• AISI 1040

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