Diffusion of Boron in Cobalt Sinters

Borowiecka-Jamrozek, J.; Lachowski, J.

doi:10.2478/amm-2013-0137

Cited by 6 publications

(5 citation statements)

References 2 publications

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“…Dilatometry was also used to monitor the progress of phase transformations occurring in the as-consolidated CMP alloy during heating to 900°C and cooling to room temperature. The densities, hardness numbers and tensile test results were compared with the existing data which had been earlier acquired for hot pressed CoEF powder, provided by Umicore [4,5].…”

Section: Experimental Procedures and Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties a New Iron-Base Material Used for the Fabrication of Sintered Diamond Tools

Borowiecka-Jamrozek

Konstanty

2014

AMR

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The main objective of the present work is to characterise the microstructure and mechanical properties of a new iron-base material which has been recently gaining ground in the manufacture of diamond impregnated tools as an economical substitute for cobalt and cobalt alloys. Its density, hardness and yield test properties have been directly compared to those of hot pressed Cobalt Extra Fine (CoEF) powder. It has been shown that the raw iron-663 bronze powder mix can be consolidated to a virtually pore-free condition by hot pressing at 880°C. Although the as-consolidated material is inferior to cobalt, it displays a favourable combination of hardness, yield strength and ductility, and seems to have a great potential for moderate and general purpose applications.

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Section: Experimental Procedures and Resultsmentioning

confidence: 99%

Microstructure and Mechanical Properties a New Iron-Base Material Used for the Fabrication of Sintered Diamond Tools

Borowiecka-Jamrozek

Konstanty

2014

AMR

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“…TYSIĄCLECIA PP7, 25-314 KIELCE, POLAND * Correspondence author: jamrozek@tu.kielce.pl tives to cobalt powders [10]. To date, researchers have proposed a broad range of new iron-base alloys, which could be used as the matrix in diamond tools [11].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Borowiecka-Jamrozek¹

2020

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The main objective of the present work was to determine the effect of powder composition on microstructure and properties of iron-base materials used as matrices in diamond impregnated tools. The Fe-Cu-Ni powders premixed and ball-milled for 30 hours, were used for the experiments. The influence of manufacturing process parameters on microstructure and mechanical properties of produced sinters was investigated. Sintering was done by hot-pressing technique in graphite mould. The powders were consolidated to a virtually pore-free condition during 3 minutes hold at 35MPa and 900°C. Investigations of the sintered materials included: density, hardness, static tensile test and X-ray diffraction (XRD) analysis. Microstructural and fractographic observations were also made with a scanning electron microscope (SEM). The obtained results indicate that the sintered parts have a high density, close to the theoretical value, good plasticity, relatively high hardness and yield strength, and are characterized by a coarse-grained microstructure.

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“…The results were compared with the data obtained for the sintered specimens fabricated by hot pressing from cobalt SMS powder [15].…”

Section: Introductionmentioning

confidence: 99%

“…1) have been produced from cobalt powders. From an industrial point of view, the use of cobalt as the metalbond material has a number of advantages [1][2][3][4][5]. Cobalt is available in the form of powders differing in chemical purity as well as the size and shape of particles.…”

Section: Introductionmentioning

confidence: 99%

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Sintered FeCuRe Alloys Produced from Commercially Available Powders

Borowiecka-Jamrozek

2017

Archives of Metallurgy and Materials

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This paper discusses the mechanical properties of materials fabricated from commercially available powders designed for use as a metal matrix of diamond-impregnated composites. The powders with the catalogue numbers CSA and CSA800 produced in China were tested under laboratory conditions. The specimens were fabricated in a graphite mould using hot pressing. The materials were analysed for density, porosity, hardness and static tensile strength. A scanning electron microscope (SEM) was employed to observe the microstructure and fracture surfaces of the specimens. The experimental data was used to determine how the chemical composition of the powders and the process parameters affected the microstructure and properties of the materials. The properties of the sintered materials produced from the Chinese powders were compared with the properties reported for specimens fabricated from cobalt powder (Co SMS). Even though the hot pressed CSA and CSA800 powders had inferior mechanical properties to their cobalt analogue, they seem well-suited for general-purpose diamond-impregnated tools with less demanding applications.

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Diffusion of Boron in Cobalt Sinters

Cited by 6 publications

References 2 publications

Microstructure and Mechanical Properties a New Iron-Base Material Used for the Fabrication of Sintered Diamond Tools

Microstructure and Mechanical Properties a New Iron-Base Material Used for the Fabrication of Sintered Diamond Tools

Archives of Metallurgy and Materials

Sintered FeCuRe Alloys Produced from Commercially Available Powders

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