Sandvik Ab

Henri Pastor

Stefan S Ederyd

Mats G Waldenstrom

Colette Allibert

Nicolas Chardon

Francisco Castro-Fernandez

Laurent Ottavi

Manuel Albajar

One or more metal salts of at least one of Co, Ni and/or Fe is dissolved/suspended in water. To the solution/suspension is added at least one hard constituent powder to form a slurry. The solvent is evaporated, preferably by spray drying, and the resultant powder is heat treated in a reducing atmosphere. As a result, a coated hard constituent powder is obtained which, after addition of a pressing agent, can be compacted and sintered according to standard practice. In addition to or instead of said salt of Co, Ni and/or Fe, a soluble salt of Mo and/or W can be used.

Method of making metal composite materials

A corrosion resistant material contains essentially WC, and 0.1 to 10 weight-%, preferably 0.5 to 5 weight-%, of one or more of the metallic carbides TiC, VC, NbC, TaC, Cr.sub.3 C.sub.2, ZrC or combinations thereof or with WC, and either spherical graphite and/or spherical hexagonal BN up to 10 volume-% with a size of about 3 .mu.m or 1-5 weight % of one or more of VN, Ti(C,N), CrN, ZrN. In applications with sliding surfaces, it has been found that the material has surprising results regarding low friction characteristics.

Binderless carbides for tribological applications

Cermets based on transition metal borides, their production and use

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Grenoble, France

Henri Pastor