Analysis of Welding Characteristics of Two Dissimilar Metal (FSS 409 and ASS 304) Using TIG Welding

Abstract

The TIG welding of stainless steel sheets is influenced by numerous factors. Because of practical constraints, four defining traits were taken into account during the experimental investigation. When selecting the parameter values, the qualities of the materials and the industry-available equipment for experimentation were taken into account. A study was done on the hoarding pipe welding process that is now in use. The design of experiments technique was used to plan the experiments. Ideal welding conditions were shown to increase penetration depth, hardness, and ultimate tensile strength. The best parameter selection was confirmed by destructive and nondestructive mechanical testing. When ideal conditions were employed throughout the welding process, the joint tensile strength and hardness of stainless steel ASS304 were increased by 10.56% and 7.36%, respectively. Ultrasonic testing was utilized to check the integrity of the welded joints and search for internal flaws. TIG welding employs a non-consumable tungsten electrode to create the arc, whereas MIG welding uses a consumable wire electrode fed through a wire feeder. MIG welding employs the wire electrode as both the arc source and the filler, as opposed to TIG welding, which calls for the manual addition of a separate filler metal. The usual gas for TIG welding is argon (Ar). Helium (He) can be introduced to increase the penetration and fluidity of the weld pool. You can weld with argon or argon/helium mixtures in all grades. Sometimes nitrogen (N2) and/or hydrogen (H2) are added to obtain specific properties.