Investigations on welding characteristics of gas metal arc welding process using flat wire Electrode

Abstract

Although welding is considered a relatively developing process day-by-day, its origins can be traced to ancient times, around 1000 B.C. At the turn of the 19th century, welding had become a popular commercial process for joining of many engineering metals. Of late, the arc welding technology has been appreciably improved and proposed for various industrial applications. Now, arc welding process is dominant as a joining process among the world s welding fabricators, especially gas metal arc welding. About 40% of the production with help of welding in country (like India) is accomplished by this process In Gas Metal Arc Welding (GMAW), maintaining quality remains a challenging task. Recent investigations have shown that the parameters of electrode geometry such as change in electrode diameter, different electrode tip geometry, flat tip electrode, sharpened electrode, and twin-wire electrode influence the weld quality. In this work, a flat wire electrode has been proposed for GMAW. The main objective of this thesis is to develop flat wire electrode for improving the dimensional quality and the mechanical properties of the weld in GMAW process. newline