A COMPARATIVE STUDY ON RESIDUAL STRESS, CORROSION, AND DRY SLIDING WEAR BEHAVIOR OF H13 TOOL STEEL CLADDED WITH CrNiW AND CrNiFeAlZr USING HIGH POWER LASER

In this work, laser cladding on H13 tool steel substrate with two different powder compositions CrNiW and CrNiFeAlZr has been carried out. The optimal deposition conditions were acquired for corrosion, wear, and residual stress study. The untreated surfaces showed deeper grooves in the wear analysis. This demonstrated that the untreated substrate surface had a high degree of plastic deformation, confirming lower wear resistance to abrasion. In contrast to the untreated substrate specimen, the CrNiW and CrNiFeAlZr laser-clad samples displayed increased wear resistance. Compared to the H13 steel substrate, the coated samples exhibited significantly lower coefficient of friction and superior wear resistance. Furthermore, increased corrosion resistance was demonstrated by both coatings in a 3.5% NaCl solution. The coated specimens had a higher [Formula: see text] value than the substrate. In contrast, the [Formula: see text] value of the coating was lower than base metal. It is proposed that the compressive residual stress that was produced on the surface of CrNiW clad specimen was caused by the disparity in the substrate and surface rates of cooling during the cladding process.