Title: Chemical composition analysis and hardness measurement of the cutting pick

Authors: Junyuan Wang; Haipeng Wang; Cong Du; Huajun Wang; 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 ' School of Mechanical and Power Engineering, North University of China, Taiyuan, Shanxi 030051, China

Abstract: Cutting pick is the main cutting tool in mining engineering. Material composition is the key in determining the properties of cutting tools. The present study carried out chemical composition analysis and hardness tests of all the constituent parts of conical pick. The microstructure of cutter head has been observed and analysed using scanning electron microscopy (SEM) so as to understand the distribution of carbide grains well. Linear intercept method has been applied to calculate WC grain size in cemented carbide. Hardness measurements suggest that the materials used for cutting pick in the work can satisfy the requirement of wear resistance well. Cutter head is WC-Co cemented carbide that has good combination of high hardness and toughness. Fe-based surfacing layer is quite qualified as the protective layer for cutting pick due to its higher hardness as well as higher wear resistance relative to that of pick matrix.

Keywords: material composition; hardness measurement; cutting picks; cutter head; cemented carbide; pick matrix; brazing materials; surfacing layer; chemical composition; mining engineering; microstructure; carbide grain distribution; grain size; wear resistance; toughness.

DOI: 10.1504/IJMME.2016.076491

International Journal of Mining and Mineral Engineering, 2016 Vol.7 No.2, pp.102 - 112

Received: 22 Jun 2015
Accepted: 03 Nov 2015

Published online: 10 May 2016 *

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