A Review on Pulsed TIG welding

Abstract

TIG welding is one of the most useable manufacturing process for the fabrication. High
quality welded joint with fever defect is primarily required in the present manufacturing
scenario. Since hear affected zone (HAZ) the strength of welded joint therefore pulsed TIG
welding process is used. It is mostly used for fully mechanised and automated welding
process. The welding current changes periodically between a high pulse current IP and low
current IG value. In the basic current phase, the low temperature causes a decrease in volume
of the molten pool. Thus the heat input is reduced and optimum control of the molten bath is
ensured. It is found that pulsed TIG welding process produced fine grain compared to
conventional TIG welding. Pulsed TIG welding have several advantages including low heat,
greater control over the work to know the effect of various input parameter that affect the
tensile strength of the welded joint. Minitab18 is used to find optimum parameter.