Mill rollers and abrasion resistant surface coatings for mill rollers

摘要

Hardfacing for a sugar mill roller is disclosed including a wear resistant material supported by a mild steel matrix and applied to the outer surface of the sugar mill roller. A method of hardfacing a sugar mill roller is also disclosed wherein a mild steel weld pool is formed on the surface of said roller, a particulate wear resistant material is impinged on the weld pool, and the weld pool is allowed to solidify. A method of applying a hardfacing capping to a ridge profile of a sugar mill roller is also disclosed, wherein hardfacing composition comprising a mild steel matrix material is progressively laid up by welding and a particulate abrasion resistant material is continuously impinged thereon. Preferably, the ridge profile includes a base portion and one or more elongate projections extending away from the base portion, and one or more beads of hardfacing composition are applied to the base portion against the sides of the or each projection in successive layers until the height of the or each projection is substantially reached. It is further preferred that is at least one further bead of hardfacing composite is applied to the or each responsive projection to substantially encapsulate same.