| Performax Chromium Overlay |
 The wear resisting side of Performax plate appears as smooth wide
bands. These fused bands form an essentially flat even continuous surface. During the overlay process, stress relief cracks develop
at right angles to the weld bead, but only in the carbide layer. This checking is desirable for forming plates into curved shapes
without damaging the overlay and also allowing for the co-efficient of expansion between the two different layers of metals.
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Boundary offers a complete service of Cutting, Surface Grinding, Forming, Rolling, Custom Fabrication.
- Cutting
Performax plates are readily cut by plasma arc, laser, or waterjet. Carbon arc-air may be used for gouging and piercing
- Welding
Performax plates are easily welded using a low hydrogen electrode (E7018) for the base plate. A pass using an E309
stainless steel electrode between the mild steel and chrome carbide is recommended. The final capping weld should be done using Performax #1
hard surfacing electrode.
- Machining
Performax plates cannot be conventionally machined because of their natural hardness and toughness, but they can be surface ground.
- Bending
Performax plate can be cold formed or hot formed. Forming with the overlaid side on the inside, bend radiuses from 16 to 24 times the
thickness of the plate can be achieved. Forming the hard face on the outside can only be done with a diameter in excess of 35-inches (890mm). Forming
dies must not have sharp edges.
- Rolling
Although rolling with beads is preferable in order to close the cross checks, Performax can be rolled both along and across the weld
beads. To prevent damage to rolls, it is recommended to cover the upper roll with a mild sleeve.
- Installation
Performax plate is easy to install by welding the base plate directly to any support structure or by plug welding. It can also be
bolted in place using weld studs; welding nuts to the base plate or plasma cutting holes through the plate and welding in a machined countersunk insert.
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