Experimental investigations on high temperature wear behavior of plasma sprayed cr3c2 and stellite coating on inconel 625

Abstract

Availability and high wear resistant properties of Inconel 625 find its newlineapplications in the harsh working environments like marine and power plants. newlineHigh tensile and oxidation resistance of this metal favors its use in the newlineaerospace applications. Research has been carried erstwhile in Inconel metals newlineto test its hardness and wear resistant properties. There is a room for newlineimproving the physical properties of Inconel 625. Very limited research has newlinebeen carried out to address this gap. The physical properties of Inconel 625 newlinecan be further enhanced by permanent deposition of materials over their newlinesurface. The goal of this research work is to improve the physical properties newlineof Inconel 625 by coating with chromium carbide (Cr3C2) and Stellite. newlineThe present research objective is to develop two samples; the base newlinemetal Inconel 625 plasma sprayed with Cr3C2 and Stellite and to study their newlinewear resistant behavior under room temperature, 100°C, 200°C, 300°C and newline400°C. The particle size of Cr3C2 and Stellite are 1.5 and#956;m respectively. The newlinesamples are coated using the Atmospheric Plasma Spraying (APS) technique newlinefollowing the ASTM C633 standard. Among various coating methods, APS is newlinea low cost, simple, and flexible method which can produce high flame newlinetemperatures (greater than 10,000 K) along with ultra-high cooling speed (10-5 newline- 10-7 K/s). In this method, the coating is developed in form of splats with newlinegood mechanical adhesion with the underlying substrate. Plasma sprayed newlinecoatings have been used in industrial or aerospace applications as a technique newlineof enhancing the wear resistant performance of parts operating under harsh newlineworking environments. newlineThe coated samples are characterized by Scanning Electron newlineMicroscopy (SEM) and Energy Dispersive Analysis (EDAX) analysis newlinefollowing the ASTM E986-04. newline