Comparison between Cobalt and Niobium as a Matrix Component for Diamond Impregnated Tools Used for Stone Cutting

Hellen Oliveira; Adriano Coelho; Pedro M. Amaral; Jorge C. Fernandes; Luis Guerra Rosa

doi:10.4028/www.scientific.net/KEM.548.98

Paper Titles

Comparative Study between Coefficient of Dynamic Friction and Slab Surface Roughness of Brazilian Siliceous Dimension Stones
p.65

A New Laboratory Methodology for Assessing the Cutting Behaviour of Gangsawing Blades
p.72

Tests for the Optimization of Cut-Off Parameters for Seven Galician Granite Varieties
p.82

Electro-Contact Discharge Dressing of Cut-Off Grinding Disks for Natural Stone Machining
p.90

Comparison between Cobalt and Niobium as a Matrix Component for Diamond Impregnated Tools Used for Stone Cutting
p.98

Optimisation of Circular Sawing Conditions to Maximize Tool Productivity for each Class of Material
p.106

Rock Properties versus Blades and Grit Consumption in Granite Multi Blade Sawing Process
p.115

Considerations on Granite Dimension Stone Porosity and Modifications from Quarry to Slabs
p.124

Use of Quartzite Quarries Wastes in Civil Construction
p.135

HomeKey Engineering MaterialsKey Engineering Materials Vol. 548Comparison between Cobalt and Niobium as a Matrix...

Comparison between Cobalt and Niobium as a Matrix Component for Diamond Impregnated Tools Used for Stone Cutting

Abstract:

This investigation examines the possibility of adding niobium (Nb) to the Fe-Cu system in order to obtain, after powder compaction and sintering, a binder material (bonding matrix) with the adequate wear properties needed for the fabrication of diamond impregnated tools for stone cutting. The main objective is the replacement of cobalt (Co) by Nb in the Fe-Cu-Co alloys that are currently used in diamond tools. For this purpose, a comparative study has been conducted on some selected compositions of matrices integrated in cutting discs. Results of diamond impregnated 25wt%Fe-50wt%Cu-25wt%Nb and 25wt%Fe-50wt%Cu-25wt%Co matrices are directly compared because all tests were conducted under similar conditions. Two types of diamonds were used: without coating and Ti-coated. After the hot-pressing cycles, the main mechanical properties of the sintered bodies were evaluated. Cutting tests under real conditions, in Porriño granite, were carried out to compare the performance of the tools. Although the mechanical properties of the matrices with Nb were different from those found in the matrices with Co, the results obtained from the cutting tests have revealed that the tools made of 25wt%Fe-50wt%Cu-25wt%Nb and 25wt%Fe-50wt%Cu-25wt%Co matrices, both with 50/60 mesh diamonds, show quite similar behaviour during the cutting operations, thus indicating that replacement of Co by Nb is a promising route to be followed in the near future.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 548)

Pages:

98-105

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.548.98

Citation:

Cite this paper

Online since:

April 2013

Authors:

Hellen Oliveira, Adriano Coelho, Pedro M. Amaral, Jorge C. Fernandes, Luis Guerra Rosa

Keywords:

Diamond Impregnated Tools, Mechanical Property, Metallic Binder, Niobium, Stone Cutting

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

References

[1] I.E. Clark, B.J. Kamphuis: Cobalite HDR – a new prealloyed matrix powder for diamond construction tools, Industrial Diamond Review, Vol. 62, no. 3 (2002), pp.177-182.

Google Scholar

[2] M. del Villar, P. Muro, J.M. Sanchez, I. Iturriza, F. Castro: Consolidation of diamond tools using Cu-Co-Fe based alloys as metallic binders, Powder Metallurgy, Vol. 44, no. 1. (2001), pp.82-90.

DOI: 10.1179/003258901666211

Google Scholar

[3] Eurotungstene: Keen® – a new concept in prealloyed powders, Industrial Diamond Review. No. 3 (2005) pp.45-47.

Google Scholar

[4] B. Kamphuis, A. Serneels: Cobalt and nickel free bond powder for diamond tools: Cobalite® CNF, Industrial Diamond Review, No. 1 (2004) pp.26-32.

Google Scholar

[5] H.C.P. de Oliveira, S.C. Cabral, R.S. Guimaraes, G.S. Bobrovnitchii, M. Filgueira: Processing and characterization of a cobalt based alloy for use in diamond cutting tools,. Mat. -wiss. u. Werkstofftech. Vol. 40, no. 12 (2009) pp.907-909.

DOI: 10.1002/mawe.200900531

Google Scholar

[6] H.C.P. de Oliveira: Influência de adições de nióbio no sistema ferro-cobre para atuar como matriz ligante em ferramentas diamantadas (Tese Doutorado / PhD thesis, Universidade Estadual do Norte Fluminense, Brazil, 2010).

DOI: 10.17533/udea.rccp.v28n2a04

Google Scholar

[7] P.M. Amaral, A. Coelho, C.A. Anjinho, J.C. Fernandes, L.G. Rosa: Evaluation of the relationship between diamond tool wear performance and the mechanical properties of the individual metallic binders, Materials Science Forum, Vol. 636-637 (2010).

DOI: 10.4028/www.scientific.net/msf.636-637.1467

Google Scholar

[8] L.G. Rosa, J.C. Fernandes, P.M. Amaral, C.A. Anjinho, A. Coelho: New standard methodologies to classify the efficiency of diamond cutting discs, Marmomachine magazine, 218 (2011), pp.10-24.

Google Scholar