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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 (< 1m) 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 1200-1500C 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 |
Files in This Item:
File | Description | Size | Format | |
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Microstructure, mechanical properties and cutting.pdf | Access is limited to UniMAP community. | 204.55 kB | Adobe PDF | View/Open |
Abstract.pdf | 7.12 kB | Adobe PDF | View/Open |
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