Abstract: The paper presents modelling mechanical properties of materials used as matrices in diamond impregnated tools. Five powder metallurgy materials were manufactured by the hot press process from various combinations of cobalt (Co SMS, Co Extrafine), carbonyl iron (Fe CN) and tungsten (WP30) powders. After consolidation the specimens were tested for density, hardness and tensile properties. The stress/strain fields around a diamond particle in a matrix were been obtained by computer simulations. Computer simulations were performed for the protruding diamond particle after hot pressing and after loading with an external force. The effective use of diamond impregnated tools strongly depends on mechanical properties of the matrix, which has to hold the diamond grits firmly. The diamond retention capability of the matrix is affected by interactions between the diamond crystal and the matrix during the segment manufacture. It was assumed that the matrix potential for diamond retention can be associated with the amount of the elastic and plastic deformation energy. The stress and strain fields generated in the matrix were calculated using the Abaqus software.
B I B L I O G R A F I A[1] KONSTANTY J., Powder metallurgy diamond tools: a review of manufacturing routes, Materials Science Forum, vols 534-536 (2007) 1121-1124.
[2] KONSTANTY J., Powder Metallurgy Diamond Tools, Elsevier, Oxford, 2005.
[3] KONSTANTY J., Production of diamond sawblades for stone sawing applications, Key Engineering Materials, 250 (2003) 1-12.
[4] KONSTANTY J., Production parameters and materials selection of powder metallurgy diamond tools: technology review, Powder Metallurgy, 49 (2006) 299-306.
[5] LACHOWSKI J., The Operational and Economic Aspects of Using Cobalt in Metallic-Diamond Tools, in Selected Problems of Mechanical Engineering and Maintenance, ed. Radek N., Kielce University of Technology, M29, Kielce 2012.
[6] http//minerals/.usgs.gov/minerals/pubs/commodity/cobalt, retrieved 30 september 2013.
[7] ROMAŃSKI A., LACHOWSKI J., KONSTANTY J., Diamond retention capacity - evaluation of stress field generated in a matrix by a diamond crystal, Industrial Diamond Review, 66 (2006) 43-45.
[8] ROMAŃSKI A., LACHOWSKI J., Effect of friction coefficient on diamond retention capabilities in diamond impregnated tools, Archive of Metallurgy and Materials, vol 54, No 4, 2009
[9] ROMAŃSKI A., LACHOWSKI J., FRYDRYCH H., Is energy of plastic deformation a good estimator of the retentive properties of metal matrix in diamond impregnated tools? 2nd International Industrial Diamond Conference, 19-20th April 2007, Rome, Italy
[10] ROMAŃSKI A., LACHOWSKI J., FRYDRYCH H., Energy of plastic deformation as an estimator of the retentive properties of the metal matrix in diamond impregnated tools, Diamond Tooling Journal, vol 1, 2009, pp 28-36
[11] Encyclopedic Dictionary of Condensed Matter Physics, Ed Ch P Poole jr, Elsevier Academic Press, London 2004.
[12] Handbook of Condensed Matter and Materials Data, eds. W. Martienssen & H. Warlimont, Springer Berlin Heidelberg 2005.
[13] Properties of Diamond, de Beers Industrial Diamond Division, Special publication K4000/5/89.
[14] SIMULIA Dassault System, Abaqus analysis user’s manual, Version 612 (2012). 