Abstract
In this paper the influence of the Ni binder metal and Al as an additional alloying element on the microstructure and mechanical properties of WC-based cemented carbides processed by conventional powder metallurgy was studied. Microstructural examinations of the cemented carbides with 3 and 5 wt.% of Al in the binder metal indicated the presence of a very low and evenly distributed porosity as well as the presence of islands of metal binder in the microstructure. With the cemented carbide with 7 wt.% of Al in the metal binder, the presence of brittle needle-like regions was observed. The WC particles inside these regions were rounded and had a larger mean free path. Vickers hardness and flexural strength tests indicated that the cemented carbide WC-Ni-Al with addition of 5 wt.% of Al in the binder metal presented bulk hardness similar to the conventional WC-Co cemented carbides as well as superior flexure strength and fracture toughness.
References
[1] M.Zhong, W.Liu, Y.Zhang, X.Zhu: Int. J. Refract. Met. Hard Mater.24 (2006) 453. 10.1016/j.ijrmhm.2005.09.002Search in Google Scholar
[2] H.C.Kim, I.J.Shon, J.K.Yoon, J.M.Doh, Z.A.Munir: Int. J. Refract. Met. Hard Mater.24 (2006) 427. 10.1016/j.ijrmhm.2005.07.002Search in Google Scholar
[3] C.M.Fernandes, A.M.R.Senos, M.T.Vieira, J.M.Antunes: Int. J. Refract. Met. Hard Mater.26 (2008) 491. 10.1016/j.ijrmhm.2007.12.001Search in Google Scholar
[4] G.Jiang, H.Zhuang, W.Li: Mater. Sci. Eng. A360 (2003) 377. 10.1016/S0921-5093(03)00505-7Search in Google Scholar
[5] E.O.Correa, J.N.Santos, A.N.Klein: Int. J. Refract. Met. Hard Mater.28 (2010) 572. 10.1016/j.ijrmhm.2010.04.003Search in Google Scholar
[6] G.Gille, J.Bredthauer, B.Gries, B.Mende, W.Heinrich: Int. J. Refract. Met. Hard Mater.18 (2000) 87. 10.1016/S0263-4368(00)00002-0Search in Google Scholar
[7] E.Taheri-Nassaj, S.H.Mirhosseini: J. Mater. Process Technol.142 (2003) 422. 10.1016/S0924-0136(03)00621-6Search in Google Scholar
[8] E.A.Almond, B.Roebuck: Mat. Sci. Eng. A105 (1988) 237. 10.1016/0025-5416(88)90502-2Search in Google Scholar
[9] S.Ohiai, Y.Oya, T.Suzuki: Acta Metallurgica32 (1984) 289. 10.1016/0001-6160(84)90057-9Search in Google Scholar
[10] ASM Metals Handbook, Vol. 7, Powder Metal Technologies and Applications (1999).Search in Google Scholar
[11] C.Lin, E.Kny, G.Yuan, B.Djuricic: J. Alloy Compd.383 (2004) 98. 10.1016/j.jallcom.2004.04.070Search in Google Scholar
[12] A.F.Lisovskii, A.S.Vishneskii, KI.Sirota: Powder Metall. Mater.16 (1977) 345. 10.1007/BF00791082Search in Google Scholar
[13] T.W.Penrice: Int. J. Refract. Met. Hard Mater.15 (1997) 113. 10.1016/S0263-4368(97)81232-2Search in Google Scholar
[14] M.L.Flieder, H.H.Stadelmaier: Z. Metallkunde67 (1975) 402.Search in Google Scholar
[15] W.Schatt: Pulvermetallurgie – Sinter- und Verbundwerkstoffe, VEB Deutscher Verlag fur Grundstoffindustrie, Leipzig (1979).Search in Google Scholar
[16] K.Chen, L.R.Zhao: J. Mater. Sci. Letter22 (2003) 603. 10.1023/A:1023302613800Search in Google Scholar
[17] G.Gathwohl, R.Warren: Mat. Sci. Eng. A14 (1974) 55. 10.1016/0025-5416(74)90123-2Search in Google Scholar
[18] H.E.Exner, J.Gurland: J. Mater.5 (1970) 75.Search in Google Scholar
[19] B.Wittiman, W.D.Schubert, B.Lux: Int. J. Refract. Met. Hard Mater.20 (2002) 51. 10.1016/S0263-4368(01)00070-1Search in Google Scholar
[20] S.F.Scieszka: Tribology Letters11 (2001) 185. 10.1023/A:1012545930893Search in Google Scholar
© 2011, Carl Hanser Verlag, München
