Overlay welding of nickel alloys for corrosive and sour service is commercially accomplished with most welding processes ranging from shielded metal arc (stick) to laser. The valve industry has generally standardized on hot wire gas tungsten arc (GTA-HW), pulsed gas metal arc (GMA-P) and submerged arc (SAW) welding. This document will focus on these three but a little history will help explain ...

In gas metal arc welding (GMAW), the weld bead shape is an important factor that directly related to quality of welded joints. This study investigates effects process parameters, including speed (WS) and leading trailing wire feed rates (WFR), on shape, leg length penetration depth, in tandem GMAW aluminum 5083-O alloy. An asynchronous direct current–direct current pulse system a torch were des...

Butt welding is an important link to ensure quality, and the penetration state of weld main criterion achieve this. Online monitoring control welded joints measure quality. The molten pool image monitored by a visual sensor in gas metal arc (GMAW) process, bottom width predicted regression network model. Combined with real-time method, current changed monitor real time. Butt-welding experiments...

Shielding gases are fundamental to the operation of the gas metal arc welding (GMAW) process and there are a number commonly used, each with its own specific properties, i.e., ionization potential, which creates unique arc characteristics (Refs. 1–7). Shielding gases are also commonly used in a variety of premixed combinations of two or more gases in order to take advantage of the beneficial pr...

In this research, the effect of vibration at the resonant range (75 Hz) on the hardness and tensile strength of AA-5083-H321 aluminum alloy, were welded by gas metal arc welding (GMAW) investigated. Vibration forces were ranged from 850 N to 2200 N, under identical welding parameters. Tensile strength and hardness testing of welded samples were performed. After mechanical tests, the fracture su...

welding is an extremely complex process; however, due to its commercial importance, it is essential that a more thorough study of the various processes be undertaken. Three examples of areas requiring greater understanding of arc physics are presented. The first discusses heating or cooling of the metal at the cathode; the second describes variations in heat transfer using various shielding gas...

Most previous welding simulations are based on a flat weld pool surface and become unmeaningful when the surface deformation is significant. In recent years, some researchers have developed numerical models capable of simulating free surface motion in welding processes, but they focus on the discussions of physical equations, boundary conditions, and solutions, rather than the numerical algorit...

Salah satu jenis stainless steel yang cukup kuat, tahan terhadap korosi, mampu mencegah kontaminasi dan mudah dibersihkan adalah AISI 304 . Dalam aplikasinya di dunia industri penyambungan material ini sering menggunakan pengelasan, dengan parameter pengelasan berbeda-beda, sehingga akan berpengaruh sifat mekanis tersebut. Pada penelitian pengaruh dari arus mekanik pada gas metal arc welding (G...

Robotic welding processes are widely used in manufacturing and especially in the automotive industry. Quality problems in the automation of this process became a leading cause of attention by manufacturers and researchers interested in improving these processes. Within the wide range of automated welding processes that exist in the industry, the most used is the Gas Metal Arc Welding Process (G...