The Effect of Molybdenum Element on Microstructure and Wear Resistance of Fe-Cr-C-Mo Hard-Alloyed Alloy on Plain Carbon Steel

In this research, a combination of Ferro-molybdenum powders (variable amount) and Ferro- chromium and graphite (constant amount) were coated on the st37 carbon steel substrate through Gas Tungsten Arc Welding (GTAW). In order to study properties of the layer established under the layer, scanning electron microscope (SEM), EDS element microanalysis and microhardness assessment have been used, and x-ray diffraction analysis (XRD) specified that microstructure of the samples consists of (Cr7C3), (CrC) chromium carbides and (MoC) molybdenum carbides. In addition, it was found that the austenite and ferrite in both samples is composed of molybdenum wire with an increase in base Fe-Cr-C carbide (CrC) was created less on coverage. Wear highest abrasion resistance test results to the sample 2 (69 Rockwell C) is shown. The samples were studied by electron microscopy in conjunction with rubbed surfaces, the samples showed that the mechanism of wear, for example, contains molybdenum, abrasive wear, sticky type and plowing type.