Investigation of Mechanical and Welding Defect of Metal Piece Welded Through ARC and TIG Welding
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2016, Vol 4, Issue 4
Abstract
To improve welding quality of mild steel plate, an automated Tungsten Inert Gas (TIG) welding system has been developed, by which welding speed can be control during welding process. In this study, Welding of mild steel plate has been performed in two phases. In first phase by using Conventional Arc welding and in second phase by using TIG. The hardness and microstructure of Tungsten Inert Gas (TIG) weld and arc weld of a mild steel joint has been calculated and compared. The hardness of the weld joint and the Heat Affected Zone (HAZ) of a mild steel is important when considering its performance during its application in industries. The process parameters such as current, voltage, gas flow rate and electrode diameter for TIG process are chosen carefully. The hardness test was conducted using the Rockwell hardness scale B while the microstructure was evaluated using the metallurgical microscope. The hardness values in the weld cross section was observed and it was noted that the Weld zone has the highest hardness values followed by the HAZ and finally the base metal. With choice of the process parameters, current was also noted to have highest contribution on the hardness.
Authors and Affiliations
Arata Samantarya, Madhusmita Kumari Das, Janaki Kumari Khillo, Mr. Santosh Kumar Tripathy
Keywords
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