Document Type : Original Article
Authors
1
Department of Mechanical Design and Production, Faculty of Engineering, Cairo University, 12613, Egypt.
2
Ferrous Metallurg,Tabbin institute for metallurgical studies, Cairo, Egypt
3
Mining, Petroleium, Metallurgical Engineering Dept., Faculty of Engineering, Cairo Univerrsity
Abstract
A comparison study was conducted to investigate the chemical, physical, and mechanical properties of N350 and stainless steel 310 (SS 310). According to the findings, N350 has an average hardness that is twice as high as SS310. The microstructure and phase identification were examined using optical microscopy (OM) and scanning electron microscopy (SEM), while the chemical composition was examined by energy dispersive x-ray analysis (EDX) and x-ray diffraction (XRD). The value of Young’s modulus of N350 is higher than that of SS310. The oxidation kinetics of the SS310 and N350 were demonstrated at 850, 950, and 1050 °C in dry air for 50 h. The oxidation kinetics for both SS310 and N350 follow the parabolic law. The parabolic constants of SS310 are 3.00x10-9 g2/(cm4·h), 2.00x10-8 g2/(cm4·h), 2.00x10-6 g2/(cm4·h) for 850 °C, 950 °C, and 1050 °C, respectively. While the parabolic constants of N350 are 7.00x10-9 g2/(cm4·h), 9.00x10-6 g2/(cm4·h), and 2.00x10-5 g2/(cm4·h) for 850 °C, 950 °C, and 1050 °C, respectively. The activation energy of N350 (217.6 KJ/mol) is higher than that of SS310 (172.05 KJ/mol). The surface structure, elemental composition, and phase characterization of the samples under various oxidation conditions were analyzed using SEM, EDX, and XRD techniques after 50 h. The findings indicate that N350 steel is more suitable for use in the glass mold industry than SS310 steel.
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