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Sarkar, Arunava
- Selection of Appropriate Process Parameters for Gas Metal Arc Welding of a Steel under 100% Carbon Dioxide Gas Shield
Authors
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741234, West Bengal, IN
Source
Indian Welding Journal, Vol 49, No 4 (2016), Pagination: 79-88Abstract
Gas Metal Arc Welding (GMAW) is a semiautomatic, versatile process that offers high rate of weld metal deposition with all positions welding capability. It can weld different metallic materials to produce quality weld suppressing the problem of moisture and slag entrapment. In the present work, a gas shield of 100% carbon dioxide is provided during joining of typical steel flats. To derive good welded joints, a multi-response optimization problem is formulated to find out optimal parametric combinations. Experimental runs are chosen following Taguchi's L9 orthogonal array (OA). Grey relational analysis is performed on the results obtained to evolve the appropriate condition within the domain of experiments conducted. Finally a set of process parameters is recommended to achieve desired weldability.Keywords
GMAW, MAG, Taguchi Approach, Orthogonal Array, Signal-To-Noise Ratio, Optimisation, Grey Relational Analysis.
- Application of Grey-based Taguchi Method For Optimising Gas Metal Arc Welding Of Stainless Steels
Authors
1 Department of Mechanical Engineering, Kalyani Government Engineering College, Kalyani - 741 235, West Bengal, IN
Source
Indian Welding Journal, Vol 44, No 1 (2011), Pagination: 37-48Abstract
Gas Metal Arc Welding (GMAW) is widely used in industry to obtain high quality welds with high deposition rate. Carbon di-oxide is used in this work for GMAW, the process known as metal active gas (MAG) welding. In this experimental investigation, 1.2 mm diameter of stainless steel electrode is employed maintaining a ischolar_main gap of 1.3 mm and 15 bar gas pressure. Welding voltage, welding current, and welding speed are varied to weld stainless steel specimens to make square butt joint. Experimental design is made using Taguchi's L9 orthogonal array design, and signal-to-noise ratio is used to derive objective functions to be optimized within experimental domain. Objective functions selected include weld bead reinforcement, depth of penetration, weld metal hardness and bending load at a bend angle of 100. Grey relational analysis is applied to solve this multi-response optimization problem. Within the experimental domain, optimum weld is found with a weld current of 160 amp and a weld voltage of 30 volt with 327 to 554 mm/min weld traverse speed.