Microstructure and High Temperature Oxidation Properties of Fe-Cr-Ni HK30 Alloy Manufactured by Metal Injection Molding

• Autorzy: Wi Dong-Yeol , Kim Young-Kyun , Yoon Tae-Sik , Lee Kee-Ahn

Identyfikatory

DOI

10.24425/amm.2019.127571

• Języki publikacji: EN

Abstrakty

EN

This study investigated the microstructure and high temperature oxidation properties of Fe-25Cr-20Ni-1.5Nb, HK30 alloy manufactured by metal injection molding (MIM) process. The powder used in MIM had a bi-modal size distribution of 0.11 and 9.19 μm and had a spherical shape. The initial powder consisted of γ-Fe and Cr₂₃C₆ phases. Microstructural observation of the manufactured (MIMed) HK30 alloy confirmed Cr₂₃C₆ along the grain boundary of the γ-Fe matrix, and NbC was distributed evenly on the grain boundary and in the grain. After a 24-hour high temperature oxidation test at air atmospheres of 1000, 1100 and 1200°C, the oxidation weight measured 0.72, 1.11 and 2.29 mg/cm², respectively. Cross-sectional observation of the oxidation specimen identified a dense Cr₂O₃ oxide layer at 1000°C condition, and the thickness of the oxide layer increased as the oxidation temperature increased. At 1100°C and 1200°C oxidation temperatures, Fe-rich oxide was also formed on the dense Cr₂O₃ oxide layer. Based on the above findings, this study identified the high-temperature oxidation mechanism of HK30 alloy manufactured by MIM.

Słowa kluczowe

EN

metal injection molding; HK30; microstructure; high temperature oxidation

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 2
• Strony: 525--530
• Opis fizyczny: Bibliogr. 8 poz., fot., rys., tab.

Twórcy

autor

Wi Dong-Yeol

• Inha University, Department of Materials Science & Engineering, Incheon 22212, Republic of Korea

autor

Kim Young-Kyun

• Inha University, Department of Materials Science & Engineering, Incheon 22212, Republic of Korea

autor

Yoon Tae-Sik

• Bestner Co., Eumseong, Chungcheongbuk-do 27623, Republic of Korea

autor

Lee Kee-Ahn

• Inha University, Department of Materials Science & Engineering, Incheon 22212, Republic of Korea

Bibliografia

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• [5] Y.-K. Kim, T.-S. Yoon, K.-A. Lee, Korean J. Met. Mater. 56, 121 (2018).
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• [7] R. Bauer, M. Baccalaro, L.P.H. Jeurgens, M. Pohl, E. J. Mittemeijer, Oxid. Met. 69, 265 (2008).
• [8] N. Madem, J. Monnier, R. B. Hadjean, A. Steckmeyer, J. M. Joubert, Corrosion Sci. 132, 223 (2018).

Uwagi

EN

1. This work was supported by INHA University Research Grant (INHA-57819-01)

PL

2. Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).