Sandvik Ab

Eurotungstene Poudres

Eurotungstene Poudres S.a.

Umicore Specialty Powders France

Maxime Bonneau

Stefan S Ederyd

Michael John Carpenter

Jacques Pillot

Robert Beaufoy

Mamoun Muhammed

Jan G Akerman

Jean-François Lartigue

Thierry Commeau

Nicolas Chardon

Sara Andersson

Christian Huet

Sebastien Chabord

Guy Prost

Jean Maniak

Jan Kerman

A multi-metal powder, in particular for producing diamond tools comprises iron copper, cobalt and molybdenum whose contents are expressed in the following mass percentages: Fe+Cu+Co+Mo=98 mass %, the rest being oxygen and production impurities, wherein 15%=Cu=35%, 0.03=Mo/(Co+Fe+Mo)=0.10, &#x2014;Fe/Co=2. A sintered compact is obtained by hot compaction of said multi-metal powder, for example, in the form of a diamond cutting tool.

Polymetal powder and sintered component produced based on this powder

The invention concerns a pre-alloyed metal powder essentially consisting of at least two transition metals selected among iron, cobalt, nickel, copper and zinc, and also capable of containing molybdenum, as well as sintered parts obtained using said powders. Said powders have elementary grain size greater than 200 nm and less than 5 &mgr;m. The invention is particularly useful for making special steel parts or for making cutting or grinding tools.

Micronic pre-alloyed metal powder based on three-dimensional transition metal

The invention concerns a pre-alloyed metal powder consisting essentially of tungsten and/or molybdenum, at least one transition metal selected among iron, cobalt, nickel and copper, and optionally at least one additive, the iron content being less than 50 wt. % and the total additive content being less than 3 wt. %, relative to the total weight of metals, said pre-alloyed metal powder having elementary grain size measured with scanning electron microscope, greater than 200 nm and less than 5 micrometers. The invention also concerns a sintered part obtained with such a powder. The invention is particularly applicable for producing sintered parts to be used as electric contacts, heat sinks, spark machining electrodes, mechanical balance weights, inertial units, tool-holders, anti-radiation screen, armament components, sintered steel or diamond charged cutting or grinding tools or with titanium carbide.

Metal micropowders based on tungsten and/or molybdenum and 3D transition metals

The present invention relates to a method of producing a sintered body comprising one or more hard constituents and a binder phase based on cobalt, nickel and/or iron by powder metallurgical methods milling, pressing and sintering of powders. At least part of the binderphase powder consists of non-agglomerated particles of spheroidal morphology having dimensions of 0.1 to 20 .mu.m.

Method of making cemented carbide articles and the resulting articles

A process for the production of hard materials wherein hard constituent powders are coated with cobalt and/or nickel metal in solution by reducing the metals from a suitable compound such as an oxide, hydroxide or salt with a polyol while keeping the powder in suspension. The polyol functions both as a solvent and a reducing agent at the same time and is present in an amount of at least 5 times more moles polyol than moles metal. There is obtained an even distribution of the cobalt and/or nickel over the surface of the hard constituent powder without the formation of islands of pure metal.

Method of making metal composite powders

Growing community of inventors

Le Fontanil, France

Maxime Bonneau