Title: Composition analysis and influence of different (Ti,Ta)C-Co-Ni content on hardness of WC-Co-based cemented carbide

Authors: Junyuan Wang; Haipeng Wang; Cong Du; Huajun Wang; Wenlong Ye; Hongfu Wang

Addresses: School of Mechanical and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China ' School of Mechanical and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China ' School of Mechanical and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China ' School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China ' Shanxi Safety Engineering LanBoGu Co. Ltd, Taiyuan, Shanxi 030024, China ' School of Mechanical and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China

Abstract: Cemented carbide is the most commonly used material as the cutting head of coal mining tools. In this study, seven specimens resulted from three grade cutting picks have been investigated systematically for the compositions and the hardness. Composition results shown that all the specimens were WC-Co-based cemented carbides. For specimen types A and B, all the cemented carbides have high mass ratio of TaC/TiC (2.00-7.50) and Co/Ni (10.10-34.34). The addition of TaC in cemented carbide is mainly to improve the hardness, while TiC to improve the oxidation resistance at high temperature. Hardness measurements indicated that the promoting effect of (TaC + TiC) on the hardness of cemented carbide is greatly higher than the weakening effect caused by the increment of (Co + Ni).

Keywords: material composition; cutter head; cemented carbide; hardness; WC-Co; tungsten carbide; cobalt; toughness; promoting effect; weakening effect; coal mining tools; oxidation resistance; high temperature.

DOI: 10.1504/IJMME.2015.073048

International Journal of Mining and Mineral Engineering, 2015 Vol.6 No.4, pp.361 - 372

Available online: 13 Nov 2015 *

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