STUDY TO IMPROVE ADHESIVE WEAR RESISTANCE AND HARDNESS OF MILD STEEL USING STELLOY-6 BY GTAW PROCESS
Keywords:
Multilayer hardfacing, GMAW, Adhesive wear, Pin on disc, Metallurgical characterization, ASTM A36, Wear mechanismAbstract
Hard facing is a part of surfacing technique that is a process of depositing a layer or layers of some special
alloy material on the substrate that are subjected to wear and severe loading conditions. Hard facing alloys are selected on
the basis of required application of strengthen material. Shielded metal arc welding, Submersed arc Welding process , Gas
metall arc welding is the most commonly used hard facing process because of its versatility of operation and easy
availability. Mild Steel steel has been selected as the substrate material because of its low wear characteristics and wide
industrial application. In the present work a detailed study has been carried out to investigate the ADHESIVE WEAR
RESISTANCE AND HARDNESS OF MILD STEEL USING STELLOY-6BY GTAW PROCESS Total 3 samples made to
investigate the wear characteristics, metallurgical characteristics, macro structural, dilution and spectral analysis. It was
found that as no. of layers increased, there was a change in microstructure due to the variation in chemical compositions
which resulted to increase in hardness. It also concluded that increase in no. of layers resulted to increase in reinforcement
and decrease in dilution percentage .The best wear behavior was observed in sample B with minimum wear rate of 0.0612
g/hr. The 2nd layer of sample B showed maximum percentage of carbon or carbide formation which resulted to produce a
matrix phase of martensitic and retainedaustenitic structure. All the results were explained in detail in the work.
