EFFECT OF ENERGY INPUT ON WEAR PERFORMANCE OF BORON COATING MADE WITH PTA

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 L stainless steel was coated with boron via plasma arc method and 160, 165 and 170 current values were utilized as welding parameters. The effect of the energy input on microstructure and on the abrasion resistance of the hard structures formed in the coating region was investigated. It was determined from optical microscope and SEM analysis that the coating area consisted of 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. After wear test, low mass loss was determined in samples coated with Boron 2 and it is clear that coating os Boron on 316 L stainless steel substrate is increased wear resistance. While the highest weight loss was occurred in 316 L satinless steel with 45 mg and the lowest weight loss was obtained from Boron 2 sample with 27 mg.