Abstract
In the present work an attempt was made to develop low cost high temperature wear resistance hardfacing tools. The hardfacing was applied on mild steel rod using Tungsten carbide powder by Plasma transferred arc welding (PTAW) processes. A comparative study was done to study the performance of hard facing tools with conventional tools. In this work, friction stir welding of pure copper plate of 6 mm thickness was investigated with an aim to understand the performance of tool materials on weld microstructure and tensile properties. From this investigation, it is found that the joints fabricated using PTA hardfaced tool yielded superior tensile properties compared to other joints. The optimum level of heat generation, formation of fine grains and higher hardness in plasticized zone are the main reasons for the superior tensile properties of these joints.
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