Title: Investigations on the impact fracture of cemented carbide insert during heavy-duty cutting

Authors: Tong Wang; Li Liu; Yaonan Cheng; Genghuang He; Ming Xu

Addresses: School of Mechanical and Power Engineering, Harbin University of Science and Technology, No. 52, Xuefu Road, Nangang District, Harbin, China ' School of Mechanical and Power Engineering, Harbin University of Science and Technology, No. 52, Xuefu Road, Nangang District, Harbin, China ' School of Mechanical and Power Engineering, Harbin University of Science and Technology, No. 52, Xuefu Road, Nangang District, Harbin, China ' Xiamen Golden Egret Special Alloy Co., Ltd., No. 69, Xinglong Road, Huli, Xiamen, China ' School of Mechanical and Power Engineering, Harbin University of Science and Technology, No. 52, Xuefu Road, Nangang District, Harbin, China

Abstract: The impact fracture of cemented carbide inserts is very severe during heavy-duty cutting. In this paper, the occurrence condition of insert impact fracture was first conducted by simulating the heavy-duty cutting, with the maximum principal cutting force determined as 32 KN and the cutting temperature as 1,000°C. Subsequently, an insert impact fracture limit model was established based on impact load and cutting mechanics. To study the variation regularity of its mechanical property with temperature, a high-temperature tensile test of cemented carbide was carried out. In conclusion, based on simulation, fracture limit model, and experimental results, the impact fracture analysis contour was plotted using Matlab software. The research findings can provide the basis for optimisation of heavy-duty cutting parameters as well as reducing the impact fracture of inserts.

Keywords: heavy-duty cutting; cemented carbide; impact fracture; mechanical property.

DOI: 10.1504/IJMMM.2018.089466

International Journal of Machining and Machinability of Materials, 2018 Vol.20 No.1, pp.1 - 12

Received: 16 Jun 2016
Accepted: 14 Jan 2017
Published online: 26 Jan 2018 *

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