A method and apparatus for a hammer mill's worn discs. The disc can be refurbished by removing a peripheral portion of the disc and placing a ring on the peripheral rim left on the disc. The ring preferably has a tapered, radially inwardly facing surface that abuts the peripheral rim of the disc to form annular gaps on both sides of the disc/ring junction. Molten metal, such as during a welding process, is placed in the annular gaps to form annular beads that mount the ring to the disc effectively as if the ring, beads and disc were one integral piece. The disc/ring combination is preferably heat-treated to metallurgically improve the disc in order to prepare the disc's peripheral edge, which is made up of the ring, for impacts during use.

A method for repairing a bundled tube fuel injector includes removing a portion of a pre-mix tube, aligning a tube tip with the remaining portion pre-mix tube and fixedly connecting the tube tip to the pre-mix tube. The method may further include removing an aft plate and an outer shroud from the bundled tube fuel injector so as to expose the pre-mix tube.

A fuel nozzle guide for a combustor of a turbine engine includes an annular base with a hub section, the hub section at least partially formed of a Cold Metal Transfer (CMT) weld and a method and system therefor.

Aspects of the disclosure are directed to repairing or restoring a liner associated with a combustor of an aircraft engine. The liner is at least partially stripped of at least one detail. An automated welding operation is applied to the liner. A coating of the liner on a cold side of the liner is retained on the liner during the welding operation.

A repair method is a repair method of a rotor including a rotor body extending in an axial direction about an axis and a plurality of impellers arranged in the axial direction and fixed to the rotor body, the repair method including: a step of performing welding on a repair area of the rotor body to fill a damaged portion with a welded portion; a step of performing heat treatment only on the repair area in the rotor after the welding is performed; and a step of scraping a part of the welded portion after the heat treatment is performed, to form a processing surface smoothly connected to an outer surface.

A method of remanufacturing an engine block includes providing an engine block having at least one cylinder bore with a bore interior surface having a thermal spray coating deposited thereon, determining at least a portion of the thermal spray coating is out of specification, performing a laser texture ablation (LTA) process on the thermal spray coating to remove at least a portion of the thermal spray coating and leave a textured surface, and performing a thermal spray coating operation by spraying an additional thermal spray coating on the textured surface, to thereby prevent scrapping of the engine block with the out of specification thermal spray coating.