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In situ formation of square shaped Fe2B borides in coated surface produced by GTAW

MEHMET YAZ1

Affiliation

  1. Vocational High School of Technical Sciences, Fırat University, Elazıg, Turkey

Abstract

In this investigation, a gas tungsten arc welding (GTAW) is used as a high energy density beam to form a surface over 0.15% C carbon steel with FeB and Graphite powders. The microstructure, microhardness and dry-sliding wear behavior of the composite coating were investigated using optical micrograph (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS), microhardness tester and adhesive wear tester. A lot of types of carbide and borides were formed. Fe2B, B4C, Fe3C, FeB, Fe3B, Fe7C5, C and α-Fe phases were seen in coated surfaces. The shape of the graphite present in the FeB–C composite TIG welding coatings is various from sheet-like to spherical. Within the wear test conditions used in the present research, on Fe2B coated samples wear was essentially oxidative until the failure of the coating..

Keywords

Fe2B, Adhesive wear, GTAW, SEM, Coating.

Submitted at: Aug. 14, 2012
Accepted at: Sept. 18, 2013

Citation

MEHMET YAZ, In situ formation of square shaped Fe2B borides in coated surface produced by GTAW, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 9-10, pp. 1037-1046 (2013)