INVESTIGATION OF SURFACE PROPERTIES AND FeB-Fe2B LAYER FORMATION IN PACK BORONIZING OF CEMENTATION STEEL

Tanju Teker and Murat Sari
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Tanju Teker: Department of Manufacturing Engineering, Faculty of Technology, Sivas Cumhuriyet University, 58140 Sivas, Turkey
Murat Sari: Department of Manufacturing Engineering, Faculty of Technology, Sivas Cumhuriyet University, 58140 Sivas, Turkey

Surface Review and Letters (SRL), 2022, vol. 29, issue 09, 1-8

Abstract: In this study, cementation steel was boronized at 1050∘C for 6h, 8h, and 10h. Microstructural change on the surface of the samples after boronization was detected by optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-Ray diffraction (XRD), and electron back scatter diffraction (EBSD) analyses. Also, surface roughness, microhardness, and layer thickness were measured. FeB, Fe2B phases, and saw tooth morphology expected in iron-based metals during boring process occurred in the entire process time. The average layer thickness of the boronized samples at 1050∘C for 10h was measured as 222μm and the surface roughness value was 3.40μm. The hardness of boride phases acquired on the samples varied between 1700 HV and 1730 HV. As a result, while the ratio of chromium carbide is the highest in the base metal, the boron level was the highest in the coating. Compounds 49wt.% Cr7C3 and 47wt.% B were identified as the most intensely concentrated.

Keywords: Boronizing; cementation steel; surface roughness; layer thickness (search for similar items in EconPapers)
Date: 2022
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DOI: 10.1142/S0218625X22501220

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