Bleistahl Produktions-gmbh & Co. Kg

Scm Metal Products, Inc.

Ekkehard Kohler

Dirk Emde

Anna Seyfarth

Ingwar Hunsche

Christian Blecking

Thomas Lelgermann

Anil V Nadkarni

Robert Hammelmann

Kirit Dalal

The invention relates to a highly heat conductive valve seat ring () comprising a carrier layer () and a functional layer (), wherein the carrier layer () consists of a solidified copper matrix containing 0.10 to 20% w/w of a solidifying component and the functional layer () consists of a solidified copper matrix which further contains, based on the copper matrix, 5 to 35% w/w of one or more hard phases.

Valve seat ring

The invention relates to a powdermetallurgically produced valve seat ring having a carrier layer and a function layer. It is the objective of the invention to provide a valve seat ring of the kind mentioned above that offers significantly higher thermal conductivity properties. To achieve this objective and based on a valve seat ring of the kind first mentioned above the invention proposes that the carrier material of the carrier layer has a thermal conductivity higher than 55 W/m*K at a total copper content ranging between &#x3e;25 and 40% w/w.

Highly thermally conductive valve seat ring

The invention relates to a valve guide manufactured by a powder-metallurgical process for combustion engines, said guide comprising a central section, a cam-side end piece, and a duct-side end piece, wherein the central section consists of a first material and the duct-side end piece of a second material, with the second material having a hardness in excess of 70 HRB and the first material having a hardness that is by at least 10 HRB lower than that of the second material.

Double/triple-layer valve guide

Material for the powder-metallurgical production of shaped parts, in

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Wetter/Ruhr, Germany

Ekkehard Kohler