Materials Transactions Online

Materials Transactions, Vol.52 No.04 (2011) pp.699-703
© 2011 The Japan Institute of Metals

Hardening and Toughening Mechanisms of Cemented Carbides with Plate-Like WC Grains Prepared by Seeding

Kun Liu, Lihui Zhu and Ranran Tu

Shanghai Key Laboratory of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, P. R. China

WC-10Co (mass pct.) cemented carbides containing plate-like WC grains were prepared by using plate-like WC single crystals as seeds. With the increase of seed addition amount, more and bigger plate-like WC grains are formed, the hardness and transverse rupture strength (TRS) increase first and then decrease. When 2.5 mass% seeds are added in WC-10Co, the density is hardly affected, whereas the hardness and TRS increase simultaneously, especially TRS increases by 12.8%. The hardening and toughening mechanisms of WC-10Co cemented carbides with plate-like WC grains were discussed.

(Received 2010/11/10; Accepted 2010/12/27; Published 2011/4/1)

Keywords: seed, plate-like tungsten carbide grain, microstructure, mechanical properties, hardening and toughening mechanisms

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