ISSN (0970-2083)

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Research Article Open Access

STUDY OF WELDING PARAMETERS TO CONTROL THE WELD BEAD CHARACTERISTICS IN PLASMA TRANSFERRED ARC POWDER DEPOSITION SYSTEM USING COBALT BASED HARD FACING ALLOY

Abstract

The aim of this work is to compare the weld bead geometry values with experimental results at various input conditions and arrive at the optimum input parameters for desirable weld bead geometry. Plasma Transferred Arc (PTA) hard facing (weld overlay) process using powdered filler material, is increasingly used in applications where enhancement of wear and corrosion resistance of components is required. The shape of weld bead geometry obtained in the PTA welding process is an indication of the quality and health of a good weld. Plasma transferred arc hard facing has attracted increasing attention for its effective protection against corrosion, thermal shock, and abrasion. The quality of hard faced components depends on the weld bead geometry and dilution, which have to be properly controlled and optimized to ensure better desirable mechanical characteristics of the weld. Good weld is achieved by selecting the right input parameters in this process and hence study of these input variables such as welding current, speed, etc. gives us a good analysis of how to achieve desirable weld bead characteristics using the known input variables. In this study, different weld beads would be deposited using PTA process with different parameters (welding current, travel speed, plasma gas flow and powder feed rate) using cobalt based powdered filler metal.

PRABHAKARAN S BALAJI DS AND HARISHKUMAR J

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