Thyssen Edelstahlwerke Ag

Thyssen Edelstahlwarke Ag

Volker Schuler

Klaus E Richter

Bernd Huchtemann

Serosh Engineer

A precipitation hardening ferritic-pearlitic steel containing:

Precipitation hardening ferritic-pearlitic steel valve

Internal combustion engine valve composed of precipitation hardening

The invention relates to a micro-alloyed pearlitic steels contain 0.20 to 0.50% C, 0.40 to 1.0% Si, 0,80 to 1,80% Mn, 0.008 to 0.2% S, 0 to 0.7% Cr, 0 to 0.1% Al, 0 to 0.04% N, 0.01 to 0.05% Ti, remainder iron and impurities resulting from the melting process, with mixed sulphides (manganese, titanium carbonitrides, and the like) precipitated on the grain boundaries. The steel may preferably contain an additional content of up to 0.20% V and/or up to 0.10% Nb.

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Krefeld, Germany

Volker Schuler