Influences of Cr contents on oxidation behavior of WC-Co-Ni-Cr cemented carbides at 900 °C
Journal article, 2024

Modification of binder composition is an effective way to improve the oxidation resistance of WC-Co-Ni-Cr cemented carbide. Since the adjustment of Ni and Cr contents in the Co-Ni-Cr binder alters the oxidation behavior and oxidation products, WC-Co-Ni-Cr cemented carbide is expected to achieve excellent oxidation resistance in severe service conditions. In this paper, the influences of Cr contents in Co-Ni-Cr binder phase with a fixed total amount of Co and Ni on the oxidation behavior of WC-Co-Ni-Cr cemented carbides at 900 °C was investigated. The oxide morphology and phase distribution were focused. The oxidation mechanism of WC-Co-Ni-Cr cemented carbide was discussed. It has been shown that Co-rich regions are preferentially oxidized in the initial stage of oxidation. As oxidation proceeds (60 min), the dominant oxidation product on the alloy surface is NiO. The oxidation resistance of the WC-Co-Ni-Cr cemented carbide increases with increasing Cr content in the binder. Compared to the series of WC-2Co-11Ni-xCr, WC-6.5Co-6.5Ni-xCr presents a better overall oxidation resistance due to the formation of Cr2O5 in the middle of the oxide layer.

Cemented carbide

Oxidation behavior

Morphology

Co–Ni–Cr binder

Author

Jianzhan Long

State Key Laboratory of Cemented Carbide

Chalmers, Industrial and Materials Science, Materials and manufacture

Zhuzhou Cemented Carbide Group Corp. Ltd.

Jian Yang

Zhuzhou Cemented Carbide Group Corp. Ltd.

State Key Laboratory of Cemented Carbide

Tao Xu

Zhuzhou Cemented Carbide Group Corp. Ltd.

State Key Laboratory of Cemented Carbide

Ruilin Zeng

State Key Laboratory of Cemented Carbide

Zhuzhou Cemented Carbide Group Corp. Ltd.

Ren Zhang

Zhuzhou Cemented Carbide Group Corp. Ltd.

State Key Laboratory of Cemented Carbide

Emmy Cao

Chalmers, Industrial and Materials Science, Materials and manufacture

Miwen Yuan

Chalmers, Industrial and Materials Science, Materials and manufacture

Liqun Tan

Zhuzhou Cemented Carbide Group Corp. Ltd.

Yanming Cui

Zhuzhou Cemented Carbide Group Corp. Ltd.

State Key Laboratory of Cemented Carbide

Xiuyu Wei

State Key Laboratory of Cemented Carbide

International Journal of Refractory Metals and Hard Materials

02634368 (ISSN) 22133917 (eISSN)

Vol. 118 106466

Subject Categories

Metallurgy and Metallic Materials

DOI

10.1016/j.ijrmhm.2023.106466

More information

Latest update

11/17/2023