Caterpillar Inc.
Ferritic Nitro-Carburized Track Pin for Track Chain Assembly of Machine

Abstract:

A track pin for a track chain assembly includes a body made from a steel alloy. The steel alloy has a composition comprising iron, a nitride-forming element, a carbide-forming element, and silicon. The composition of the steel alloy comprises at least 0.5 percent by weight of silicon. The body includes a compound layer on an exterior surface thereof. The compound layer includes at least one of Fe.sub.2-3(C,N) microstructures and Fe.sub.4N microstructures formed therein by ferritic nitro-carburizing.