RPM & Associates

Wear Liners and Chromium Carbide Overlay Plate

RPM overlay plate and wear liners are manufactured from our special MK chrome carbide material.  The chromium carbide wear surface is welded to a mild steel substrate.  Its primary purpose of the overlay is to protect the surface it is welded to from damaging wear and tear. Common uses include:

  • Coal Chute Liner
  • Coal Pulverizer Mill Body Journal and
  • Rotating Vane Pocket Liner
  • Hopper Liner
  • Dozer Blade Liner
  • Moldboard Wear Liner
  • Dragline Bucket Liner
  • … and many more.

“Stringer” Bead Composition Determines Wear Resistance

The percentage of chromium carbide and the overall overlay composition determine a wear plate’s resistance to abrasion and impact. A common misconception is that material hardness determines resistance to abrasion; however, resistance to abrasion is determined first by the carbide structure of the material, then by hardness. RPM uses “stringer” bead rather than oscillated bead overlays to support the formation of carbides in the overlay — a process that helps to lengthen wear life and ensure consistency throughout the wear surface.

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