Please use this identifier to cite or link to this item: http://dspace.unimap.edu.my:80/xmlui/handle/123456789/7527
Title: Microstructure, mechanical properties and cutting performance of sintered sub-micron WC-Co hardmetal powder
Authors: Mohd Asri, Selamat
S.A., Manaf
Talib Ria, Jaafar
masri@sirim.my
Keywords: Powder metallurgy
Hardmetals
Cold isostatic pressing
Cutting tool
Materials engineering
Hardmetal powders
Issue Date: 1-Dec-2009
Publisher: Universiti Malaysia Perlis
Citation: p.1-5
Series/Report no.: Proceedings of the Malaysian Metallurgical Conference '09 (MMC'09)
Abstract: The microstructure and mechanical properties of sintered 94WC-6Co hardmetal powders were investigated. In this work, sub-micron (< 1m) of tungsten carbide (WC), cobalt (Co) and paraffin wax powders were wet mixing in a tubular mixer at a mixing speed of 50 rpm for 3 hr compared with 24 hr in wet milling process. Powder mixtures were uniaxially pressed, cold isostatic pressing (CIPped) and sintered at 1200-1500C for 1 hour in a nitrogen-based atmosphere using liquid phase sintering (LPS) mechanism. The fine WC grain particles (~ 300 nm) were led to uniformity in microstructures at optimum sintering temperatures, 1450C and showed a relative sintered density above 95% of theoretical. The sintered samples obtained higher density, hardness and strength due to their fine microstructures, which are suitable for use in cutting tool application. The tool life of sintered WC-Co cutting tool insert on tool steel workpiece bar also was reported.
Description: Organized by School of Materials Engineering & Sustainable Engineering Research Cluster, 1st - 2nd December 2009 at Putra Brasmana Hotel, Kuala Perlis, Perlis.
URI: http://dspace.unimap.edu.my/123456789/7527
Appears in Collections:Conference Papers

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