Effect of CrTiAlN Coatings on High-Temperature Oxidation Behavior of H13 Steel

Abstract:

CrTiAlN hard coatings have been deposited on H13 steel for improving the oxidation resistance by Closed Field Unbalanced Magnetron Sputter Ion Plating (CFUMSIP). The phase components, surface and section morphology of H13 steel before and after oxidation were analyzed by XRD and SEM. The results showed that the columnar crystal film possesses three major parts, i.e., the internal Cr bonding layer, the intermediate CrN transition layer, the external CrTiAlN gradient coating. The selective oxidation of Cr element was found on the surface of uncoated H13 steel while oxidation, but a continuous protective layer was not formed because of low Cr content, finally a lot of alpha Fe₂O₃ particles took place on the surface of H13 steel owing to the oxidation of the matrix element. O element can diffuse much more easily through the coating and oxide scales at 800 °C, and spallation and cracks were not found during the oxidation. These results indicated that the CrTiAlN coating have excellent high-temperature oxidation resistance at 800 °C.

• Periodical: Key Engineering Materials (Volume 544)
• Pages: 343-346
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.544.343
• Online since: March 2013
• Authors: Hao Zhang, Shu Wang Duo, Xiao Yan Fei, Xiang Min Xu, Ting Zhi Liu, Yu Bin Wang
• Keywords: CFUMSIP, CrTiAlN Coatings, H13 Steel, High-Temperature Oxidation

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