Abstract
The present work studies microstructure and wear resistance of Stellite 12 alloy coating deposited on quenched and tempered AISI 4140 steel substrate using plasma transferred arc (PTA) hardfacing method. The X-ray diffraction, scanning electron microscopy (SEM) micrographs and energy-dispersive X-ray (EDX) analysis indicated that Stellite12 mainly consists of solid solution phase (α-Co, e-Co), chromium-rich carbides (Cr7C3, Cr23C6) and tungsten-containing compounds. The wear properties of PTA hardfaced stellite12 comparing with AISI 4140 steel at room temperature (RT) were investigated by using the ball-on-disc type tribotester. It has been found that the Stellite12 hardfacing coating exhibits superior wear resistance than substrate during dry sliding wear test at RT.
Highlights
Hardfacing is a technique used to enhance surface properties of metallic components under harsh conditions of aerospace, gas turbines, petrochemical, mining industries and power plants [1, 2]
Several arc welding techniques such as gas metal arc welding (GMAW), shielded metal arc welding (SMAW), submerged arc welding (SAW), gas tungsten arc welding (GTAW) and plasma transferred arc welding (PTA) and laser cladding can be used for hardfacing [1]
Three phases can be distinguished by elemental contrast
Summary
Hardfacing is a technique used to enhance surface properties of metallic components under harsh conditions of aerospace, gas turbines, petrochemical, mining industries and power plants [1, 2]. Several arc welding techniques such as gas metal arc welding (GMAW), shielded metal arc welding (SMAW), submerged arc welding (SAW), gas tungsten arc welding (GTAW) and plasma transferred arc welding (PTA) and laser cladding can be used for hardfacing [1]. Plasma transferred arc welding (PTA) represents a very good alternative to other surface welding processes. It has advantages over conventional welding techniques in terms of
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
