Soldadores

Casting Repairs

The Metalock process is accepted as the method of repairing all cracked, broken and damaged castings in cast iron, aluminium and steel for a wide range of industries in a multitude of applications. As well as carrying out a great deal of this type of work in the pressing and forging industries we are very active in the Heritage sector repairing and restoring bridges and monuments.

The repair consists of peening layers of Metalock keys into prepared apertures. These apertures are jig-drilled across the crack to accept multi-dumbell shaped keys made from a ductile, high strength nickel alloy and manufactured in a variety of sizes to suit each individual job. The keys are peened into the apertures to become integral with the parent metal. Holes are then drilled and tapped along the line of the fracture and filled with studs, each one positioned to overlap its neighbour. This combination of keys and studs produces a rigid and pressure-tight repair which restores a high percentage of the original strength. Final peening and hand dressing completes the operation.

The advantages of the Metalock repair are:

• No heat stresses are introduced

• No distortion occurs

• In many instances machining is unnecessary

• Invaluable in emergency situations

• Reduces downtime

• Avoids the replacement of expensive castings.

Before, Longitudinal crack in pump casing...

And after a Metalock Repair.

...