Abstract
A novel technique to reduce emission during stellite hardfacing was developed with a single compound activating flux. The strategy of coating the precursor of nano alumina to the base material brought a noticeable reduction in Cr6+ concentration. The optimum combination of process parameters which favoured the maximum reduction Cr6+ concentration in the welding fumes at the source was arrived using Taguchi methodology of experimental design. The maximum reduction of Cr6+ up to 34% was achieved from this novel technique.
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