Depositing Fe-C-Cr based Hardfacing Alloys on Steel Substrate for Enhancement in Wear Resistance

Abstract

Hardfacing is a surface alteration method mostly utilized for the deposition of superior and hard materials on the surface of a substrate with the help of some suitable welding process. This technique is generally used for improving the desirable surface characteristics, for example, erosion resistance, corrosion resistance, etc. of several engineering parts. In the present investigation three dissimilar Fe-C-Cr based hardfacing electrodes were deposited on the surface of ASTM A36 steel by using manual metal arc welding process for improving its wear resistance. Sliding wear behavior of bare ASTM A36 steel specimens and hardfaced ASTM A36 steel samples was studied on a pin-on-disc wear tester. It was observed that the sliding wear behavior and performance of all the hardfaced specimens was observed to be superior to that of bare ASTM A36 steel samples. The effect of the different hardfacings on the wear characteristics, behavior, performance and the extent of wear on ASTM A36 steel were thoroughly examined. The impact of the diverse hardfacing alloys on the wear characteristics, behavior, performance and the degree of wear on ASTM A36 steel were thoroughly examined.The effect of varying the percentage composition of chromium from 23% to 33% and carbon from 3.5% to 4.5% in the diverse Fe-C-Cr based hardfacing electrodes on the resultant microstructure and also the wear behavior of the deposited layers was studied. The comparison of cumulative wear rate (in Bowden) of all the hardfaced specimens with that of the bare ASTM A36 samples exhibited a considerable advancement in the wear resistance imparted by Fe-C-Cr based hardfacings over the ASTM A36 steel.