Effect of metal transfer modes on surface characteristics of gas metal arc weld deposition of stainless steel over mild steel

Abstract

newline Nowadays, low carbon steels are extensively used in the construction of structural components, chemical and petrochemical industries, offshore and oil drilling companies, power generation systems, the marine components, and industrial applications. These steels are comparatively soft and possess good strength. However, they have high ductility, making them better for machining, forming, and welding at a lower cost. However, carbon steel has a short service life due to its weak corrosion resistance. Corrosion is a major issue in many industries. Corrosion cannot be eliminated, but it can be controlled to a certain extent. The overlaying of anticorrosive material on the mild steel material increases the corrosion resistance of the surface and wear resistance properties. The process of overlaying is called cladding. Cladding is the method of depositing a layer of filler metal on a base metal through a welding process for the purpose of providing a corrosion resistant surface. It is used during the fabrication of engineering components to protect them from the effects of corrosion as well as to enhance their service life. Austenitic stainless steels (ASS) are frequently excellent choices for use as overlaying due to their superior corrosion resistance in the majority of environmental conditions, strong impact qualities at low temperatures, and high weldability. These materials are frequently employed in the petrochemical and chemical industries, where corrosion resistance at high temperatures is required. newlineThe above mentioned steels are mostly cladded by Shield Metal Arc Welding (SMAW), Gas Tungsten Arc Welding (GTAW), Sub-merged Arc Welding (SAW), Flux Cored Arc Welding (FCAW), Plasma Transferred Arc Welding (PTAW), Laser Beam Welding (LBW), and Gas Metal Arc Welding (GMAW) processes. Generally, the above processes have certain drawbacks in high heat input, lower penetration depth, lower dilution, higher reinforcement height, and a slower rate of cooling.