Influence of Cu and Ti Doping on Hard Metal Matrix of Diamond Embedded Composites for Drilling Tools

Abstract:

The lifetime of drilling tools for petroleum well perforation is strongly affected by the type of insert at the crown of the tool. Usually, this insert is made a of hardmetal (WC-Co) cermet with embedded diamond particles. In the present work an investigation on the effect of Cu and Ti as doping agents on a WC-6%Co cermet was conducted. I was found a change in coercive force in the interval 12 to 34 kJ/m and harness from 73 to 89 HRA with improving adhesion. It was also shown that this could significantly increase the operational capacity of a drilling tool.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1053-1056
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1053
• Online since: August 2012
• Authors: Ana Lúcia Diegues Skury, Guerold Sergueevitch Bobrovinitchii, Marcia G. de Azevedo, Sérgio Neves Monteiro
• Keywords: Alloy, Mechanical Property, Metal-Bonded Diamond Tools

References

[1] S. J. Heo, T. Miyamoto, J. Fujiwara, S. Hanasaki: Proc. of the Sixth International Conference on Progress of Cutting Technology (2002), pp.218-223.

[2] Takeshi Miyamoto, Junsuke Fujiwara and Keisuke Wakao, Key Engineering Materials Vols. 407-408 (2009) pp.428-431.

[3] LISOVSKY, A.F. Physico-chemical bases of forming nanostructures in the binding phase of cemented carbides. In: Sci. Hard Mat. v. 4, Powder Metal., 1998, World Congress and Exhibition. Canada, Spain. 18-22 october, London: EPMA, pp.115-118.

[4] NOVIKOV, N.V., MAISTRENKO, A.L., TREFILOV, V.I., KOVTUN, V. Structure & properties of shock-wave sintered diamond composites. IDR, 1993, n. 5, pp.278-281.

[5] AKAISHI, M., KANDA, H., SATO, Y., SETAKA, N., OHSAWA, T., FUKUNAGA, O. Sintering behaviour of the diamond-cobalt system at high temperature and pressure. J. of Materials Science, 1982, v. 17, n. 3, pp.193-198.

DOI: 10.1007/bf00809051

[6] SCOTT, P.M., NICHOLAS, M., DEWAR, B. The wetting and bonding of diamonds by copper-base binary alloys. J. of Materials Science, 1975, v. 10, n. 11, p.1933-(1940).

DOI: 10.1007/bf00754470

[7] FANG, Z.Z., GRIFFO, A., WHITE, B., LOCKWOOD, G., BELNAP, D., HILMAS, G., BITLER, J. Fracture resistant super hard materials and hardmetals composite with functionally designed microstructure. International Journal of Refractory Metals and Hard Materials, 2001, v. 14, pp.453-459.

DOI: 10.1016/s0263-4368(01)00031-2

[8] ROWCLIFFE, D.J., JAYARAM, V., HIBBS, M.K., SINCLAIR, R. Compressive deformation and fracture in WC materials. Mater. Sci. Eng. A 105/106, 1998, pp.299-303.

DOI: 10.1016/0025-5416(88)90710-0

[9] MANLANG, L., XIAOYING, H., SHITIAN, D., DAQIN, S., YUMEI, C., ZHENMEI, Y. Diffraction-contrast study of microstructure and deformation process of WC-Co cemented carbide,. Int. J. Refract. Met. Hard Mater., 1983, v. 2, n. 3, pp.129-132.

[10] VASEL, C.H., KRAWITZ, A.D., DRAKE, E.F., KENIK, E.A. Binder deformation in WC-(Co, Ni) cemented carbide composites. Metallurgical and Materials Transactions, 1985, v. 16A, pp.2309-2327.

DOI: 10.1007/bf02670431

[11] Guerold Sergueevitch Bobrovnitchii, Ana Lúcia Diegues Skury, Sérgio Neves Monteiro, Rômulo Crespo Tardim, Effect of Nanodiamond Addition on the Mechanical Properties of Polycrystalline Metallic and Polymeric Composites, Materials Science Forum Vols. 660-661 (2010).

DOI: 10.4028/www.scientific.net/msf.660-661.848