Statistical analysis of second repair welding on dissimilar material using Taguchi method

Abstract

This paper presents an experimental investigation on effect of welding parameter to repair welding of dissimilar material using Gas Metal Arc Welding (GMAW) machine. Taguchi Method has been used to analyse the statistical analysis by using Minitab Software. Repair welding getting more popular nowadays due to saving cost and prolong the material service life. The effect of repair welding of dissimilar material on mechanical properties have been studied. Statistical analysis using Taguchi Method by Minitab Software with three times repetition of L9 orthogonal array. Setting up GMAW machine with current (150A-170A), voltage (17V-21V) and jig rotational speed (50rpm-100rpm) were prepared with 3.00mm of Stainless Steel 304L and 3.60mm Carbon Steel 1387.Result shows that voltage gave a huge impact to tensile testing and micro hardness of second repair welding. While current and jig rotational speed gave less impact to responses. The benefit shown have caused repair welding to be accepted and applied in the industry. Regular and total maintenance is able to contribute to the savings while producing good preventive maintenance schedule.

Keywords

• gas metal arc welding (gmaw)
• repair welding
• taguchi method