Tailored Orbital Welding Of Dissimilar Stainless Steels Material

Mohd Faizal , Mohd Pauzi (2013) Tailored Orbital Welding Of Dissimilar Stainless Steels Material. Project Report. UTeM, Melaka. (Submitted)

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Abstract

Nowadays fabricating pipe shape in commercial application such as aerospace industry, nuclear industry, pharmaceutical industry, food industry, and so on rely using orbital welding technologies. In this experimental project to joining dissimilar material (stainless steel austenitic 304 to 316L) welded using gas tungsten arc welding (GTAW). The reason of this experimental project done is examining the effect of the GTAW weld toward the combination of different metals on microhardness and mechanical properties. The research objective is to prove that stainless steel can be join with other stainless steel depend on the condition made from the theory. The goal of this research is to achieve the perfect combination of dissimilar material. This GTAW welding will be using FRONIUS MACHINE with the help of two different materials. The different variable parameter as arc voltage, arc current and welding speed will be used to determine the weld quality hardness on the welding surface. The types of welded joints that has chosen as variable is a butt joint with a dimension of pipe 2”(50mm) x60mm. Then the test will conduct after the welding are microhardness using Vickers hardness test and microstructure will be observation on optical microscope to investigated weld fracture zone. NDT examination also used to detect of defect welding structure.

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