Effect of compacting pressure on microstructure and mechanical properties of carbide cutting tools

Albdiry, M. T. and Almosawi, A. I. (2011) Effect of compacting pressure on microstructure and mechanical properties of carbide cutting tools. Powder Metallurgy, 54 (5). pp. 585-591. ISSN 0032-5899

Abstract

The effects of compaction pressure on properties of carbide cutting tools containing 80·5 wt-%WC, 5 wt-%TiC, 5 wt-%TaC–NbC and 9·5 wt-%Co were studied. These tools were formed by powder metallurgy with different compacting pressures ranging from 77 to 231 MPa (5–15 tons in-2) and sintered in a vacuum furnace at a constant sintering temperature (1450°C) and at a constant heating and cooling rate of 5°C min-1. Green and bulk densities, shrinkage and hardness of the produced compacts were measured. Tool cutting performance has been assessed based on machining a medium alloyed steel workpiece under different cutting conditions and measuring the tool flank wear and the workpiece surface roughness. The microstructure of the compacts was metallographically examined using scanning electron microscopy. The results have revealed that both densities and hardness figures increase with increasing compaction pressures, while shrinkage decreases. Cutting performance has not demonstrated a substantial improvement of the tool’s performance and life due to the increasing compacting pressure of these tools.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright restrictions. Appeared as fast-track article 1/10/2010.
Depositing User: Mr Mushtaq Taleb Albdiry
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 10 Mar 2011 04:36
Last Modified: 19 Aug 2014 05:46
Uncontrolled Keywords: cutting performance; mechanical properties; carbide cutting tools; microstructure; compaction pressure
Fields of Research (FOR2008): 09 Engineering > 0904 Chemical Engineering > 090406 Powder and Particle Technology
09 Engineering > 0910 Manufacturing Engineering > 091006 Manufacturing Processes and Technologies (excl. Textiles)
09 Engineering > 0910 Manufacturing Engineering > 091003 Machine Tools
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1179/1743290110Y.0000000001
URI: http://eprints.usq.edu.au/id/eprint/8898

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