Fag Kugelfischer Georg Schafer

Koppern Gmbh & Co., Kg, Germany

Erasteel Kloster Aktiebolag, Sweden

Maschienfabrik Koppern Gmbh & Co. Kg

Schaeffler Technologies Ag & Co .Kg

Ksb Aktiengesellschaft

Bochumer Verein Verkehrstechnik Gmbh

Energietechnik Essen Gmbh

Köppern Entwicklungs Gmbh

Hans Berns

Werner Theisen

Birgit Wewers

Hans-Werner Zoch

Valentin G Gavriljuk

In accordance with the method according to the present invention, particles consisting of ferrotitanium, ferroniobium or ferrovanadium are dispersed and hot compacted in a metal matrix powder consisting of hardening steel or heat-resistant alloys. In so doing, titanium, niobium or vanadium carbide is obtained in situ by a solid-state reaction, i.e. without melting, from the carbon admixed or contained in the matrix powder and the ferroalloy particles. Carbon can also be absorbed from the gaseous phase and it may be substituted by nitrogen. This method permits a reasonably-priced introduction of hard particles into the composite material, the hard particles having a size that is necessary as a protection against scoring wear.

Powder metallurgical method for in-situ production of a wear-resistant composite material

Method of powder metallurgical manufacturing of a composite material

In order to obtain high resistance to corrosion of the surface layer in a stainless steel for case hardening with nitrogen, the steel contains the following alloy components (wt. %):

Stainless steel for case hardening with nitrogen

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Bochum, Germany

Hans Berns