EFFECT OF VARYING WELDING CURRENT WITH CONSTANT VOLTAGE ON THE HARDNESS OF THE WELD BEAD OF SIMILAR OR DIFFERENT MATERIALS

Sunil Kumar; Abhinay Kumar; Pardeep Kumar

Volume : V, Issue : VI, June - 2015

EFFECT OF VARYING WELDING CURRENT WITH CONSTANT VOLTAGE ON THE HARDNESS OF THE WELD BEAD OF SIMILAR OR DIFFERENT MATERIALS

Sunil Kumar, Abhinay Kumar, Pardeep Kumar

Abstract :

The need to achieve higher productivity and stringent safety requirement have put growing emphasis on the use of automated welding systems and submerged arc welding is employed in semiautomatic or automatic mode in industry. In this type of automated applications, the control of the weld bead has become very essential this is due to the fact that mechanical strength of the weld does not only depends upon the composition of the metal but it is also affected by the shape of the weld bead formed during the welding. The acceptable shape of the weld bead depends upon a number of factors such as current, voltage, welding speedetc. In this paper, the effect of varying welding current with constant voltage on the hardness of the weld bead of similar or different materials has been studied. The materials used in the study are stainless steel and mild steel. The tests which are used for the hardness testing are Brinell hardness test and Charpy Impact test.