Abstract
It is inevitable that wear on the surfaces occur when especially metal surfaces contact each other. One of the most crucial problems among surface machining is wear problem. In this study, surface of 316 sainless steel was coated with boron via plasm arc method. 160, 165 and 170 current values were utilized as welding parameters. The effect of hard structures occurring over the coating region on substrate wear resistance was investigated when welding parameters used in the study started to solidify after coating. The wear process was carried out on the pin ten disc device using a fixed load (10 N) and sliding speed (0.4 m / s) and at different sliding distances (250 m, 500 m and 1000 m) using stalked grit sandpaper. After the wear process, the characterization of the wear zone was conducted determining it with the help of SEM-EDX. It was determined from optical microscope and SEM analysis that the coating area consisted of cellular, branched and leaf-shaped dendritics; and eutectic structures were formed between these dendritics. As a result of EDX taken from coated region, Fe, B and Cr elements were found. While the highest weight loss occurred in 316 satinless steel with 45 mg, the lowest weight loss was obtained from Boron2 sample with 27 mg. After wear test, low mass loss in samples coated with Boron shows that substrate sample wear resistance increased.
Highlights
The feed rate and energy inputs used in plasm transferred arc welding (PTA) surface coating process melted the substrate material together with the coating material, resulting in metallurgically bonded coatings [35]
BORON coatability on AISI 316L steel surface was investigated by Plasma Arc Welding method
It has been determined that less mass loss has occurred in the coated samples compared to the uncoated sample as can be seen in the graph obtained
Summary
PTA method has attracted the attention of researchers in recent years due to its high welding speed, well penetration depth and good arc stability, as well as its wear-corrosion resistance and improved fatigue strength[811]. In this method, besides the wide range of materials, the performance of the material surfaces can be greatly improved by low dilution and deterioration between the hard filler layer formed on the coated surfaces and the substrate material [12,13,14,15,16]. Plasma transferred arc (PTA) technique provides strong metallurgical bond formed between the coating and substrate, low porosity, high energy conversion efficiency, high precipitation rate, low heat input [17]
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