Wearing element with enhanced wear resistance

摘要

Wearing element with enhanced wear resistance related to wearing elements, such as cast steel teeth to be specially used in machinery for earth-moving, ground-engaging and/or rock-cutting applications, as well as to inserts to be included within the wearing elements, to enhance their wear resistance thus prolonging their service life.

主权项

1. A wearing element for earth engaging machines comprising:
a gravity-cast steel surrounding and bonded to at least one bulk insert of a cemented tungsten carbide cermet, said insert comprising tungsten carbide grains with a metallic cementing matrix, said wearing element comprising: a substitution bonding zone, wherein the steel replaces the cementing matrix metal of the insert, to form a zone in which tungsten carbide grains are surrounded by steel; a precipitation bonding zone, comprising a tungsten-rich phase, composed of tungsten and iron, and at least one of coarsened grains of tungsten carbide or precipitated grains of tungsten carbide; and a tungsten-carbide-free bonding zone, comprising an iron-rich metallic phase comprising iron and tungsten.