The Physical and Technological Background of the GMA Process

Abstract

Gas Metal Arc (GMA) welding is widely used in the world manufacturing industry of modern metal structures, such as buildings, bridges, yellow goods, thanks, pressure vessels, piping, pipelines, etc., ensuring high-efficiency and high-quality semiautomatic, automatic and robotic welding. This paper describes the basic physical and technological backgrounds of GMA welding process and provides comprehensive analysis of the influence of basic GMA welding parameters on efficiency of welding and the quality of welded joints. Examples of GMA welding applications are given