| 摘要 |
A gas exchange valve of an internal combustion engine having a valve cone essentially made of a valve shaft, which passes into a valve plate while forming a hollow cone, and the valve cone or at least the valve shaft up into the area of the hollow cone being manufactured from a typical valve steel made of a nitride-forming based alloy, such that its parts which comprise a typical valve steel also have good corrosion protection. The valve cone is provided at least in partial areas with a corrosion protection layer in the form of a nitride layer, and the corrosion protection layer is generated by reacting the nitride-forming based alloy by plasma nitration or plasma nitro-carburization in a nitrogen atmosphere.
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