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Sintered FeCuRe Alloys Produced from Commercially Available Powders

Borowiecka-Jamrozek J.

Archives of Metallurgy and Materials

2017

Vol. 62, iss. 3

1713--1720

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.

New Wear Resistant Iron-Base Matrix Materials For The Fabrication Of Sintered Diamond Tools

Konstanty J., Romański A., Baczek E., Tyrala D.

Archives of Metallurgy and Materials

2015

Vol. 60, iss. 2A

633--637

The possibility of the use of inexpensive iron-base powders in the production of sintered diamond tools is again explored. Ball-milled Fe-Ni-Cu-Sn-C and Fe-Mn-Cu-Sn-C powders were consolidated to a virtually pore-free condition by hot pressing at 900°C. The resultant materials are characterised by a combination of high Knoop hardness, 260-440 and yield strength, 780-1350 MPa, and resistance to abrasion. These properties can be significantly modified by changing the milling time.

W artykule zamieszczono wyniki badań nad możliwością zastosowania tanich proszków na bazie żelaza do produkcji spiekanych narzędzi metaliczno-diamentowych. Mielone proszki Fe-Ni-Cu-Sn-C i Fe-Mn-Cu-Sn-C poddano prasowaniu na gorąco w temperaturze 900°C. Otrzymane spieki posiadają gęstość zbliżoną do teoretycznej, wysoką twardość (260-400 HK0.5), granicę plastyczności (780-1350 MPa) oraz dużą odporność na zużycie ścierne. Wymienione własności są w dużym stopniu uzależnione od czasu mielenia proszków wyjściowych.