AN APPARATUS WITH VARIABLE WIRE STICKOUT FOR SUBMERGED ARC WELDING TO PRODUCE HIGHER DEPOSITION RATES AND REDUCED DILUTION AND A METHOD FOR THE SAME

摘要

Submerged arc welding has several advantages like deep penetration, high deposition rates higher welding speed etc. However, submerged arc welding is characterized by high heat input and consequent higher dilution. In joining of metal and their alloys, the main process requirements from productivity point of view are the penetration and deposition rate. In surfacing applications, the process capabilities sought after arc lower dilution and higher deposition rate. Also these applications will benefit if better weld joint and deposit properties can be ensured. The submerged arc welding process can be made more versatile and advantageous if the energy input is better utilized to enhance the deposition rates and lower the penetration achieved, leading to lower dilution percentage.