Cobalite CNF (Cobalt Nickel Free)

Company Name: Umicore Business Unit Engineered Metal Powders
Address: Watertorenstraat 33, 2250 Olen, Belgium.
Tel: +32 14 245 479
Fax: +32 14 245 756
Contact: BertJan Kamphuis

Manufacturing route used to produce the PM material: Wet chemical process followed by reduction

Chemical composition of PM Product: Fe 68.4%, Cu 26%, Sn 3%, W 2%, Y2O3 0.6%

Typical physical properties:
a) Apparent density (g/cm3) circa 1.4
b) Flow rate (s/50g): not measured
c) Sieve analysis: not available, Fischer size = 2.2µm
d) Laser diffraction size: d10 = 3.6µm; d50 = 11.1µm; d90 = 25.5µm

Compacting properties: Compaction without lubricant at 2000 and 3500 kg/cm2 gives green pieces with more than sufficient strength for handling. Relative densities. 54% @ 2000 kg/cm2 60% @ 3500 kg/cm2.

Density (g/cm3): > 8.10 (>99% relative density)

Hardness: circa 250 Vickers

Transverse Rupture Strength (N/mm2): 1300 N/m2

Charpy Impact Resistance (un-notched) 30-35 J/cm2
As Sintered plus hot pressing, 350 bar, 3 minutes, 800 C

Date PM Production First Started: 2nd Quarter 2003

Material being used currently?: Yes

Cobalite CNF is the only cobalt replacement in diamond tools which is made of elements that are less hazardous for human health. It is also easier to sinter and cheaper than cobalt.

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