Abstract
In the current study, the microhardness, layer depth, corrosion properties, and kinetics of chromium boride coatings on DIN 1.2714 hot-worked tool steel have been investigated. Thermodiffusion chromium boride coatings have been carried out for the first time by a duplex salt bath immersion coating by chromizing at 1050°C followed by boronizing at 950°C, 1000°C, and 1050°C (chromo-boronizing). The coating layer obtained was hard (2482 HV), compact, and homogeneous. The kinetics of the chromium boride coating followed a parabolic relation (d 2 = Kt) and the activation energy of the formation of the chromo-boronized layer was calculated as 132 kJ/mol. The corrosion resistance of the coating was evaluated by potentiodynamic polarization in 3.5% NaCl solution. The results showed the degradation of the corrosion properties of the coated samples.
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Aghaie-Khafri, M., Mohamadpour Nazar Abady, M. A Study of Chromo-Boronizing on DIN 1.2714 Steel by Duplex Surface Treatment. JOM 64, 694–701 (2012). https://doi.org/10.1007/s11837-012-0337-x
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DOI: https://doi.org/10.1007/s11837-012-0337-x