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Liquid Nitriding

Liquid nitriding is a subcritical surface enhancement process with one of the longest track records of success of any case hardening technology.

PVD Coatings

PVD coatings involve the deposition of thin (2-10 microns; 0.0001" – 0.0004") films on the surface of tools and components.

Engineered Bushings

HEF bushings are recognized worldwide for their excellent frictional and anti-seizure properties, and ability to withstand high loads.
Tribology Testing

Tribology Testing Resources

HEF's Surface Mechanics and Tribology Team have extensive resources for the comprehensive study of wear and friction control.

  • Extensive database of friction tests conducted over the past several decades
  • More than 40 types of test beds for accelerated wear simulation and characterization of wear behavior
  • Special environment testing: cryogenic, temperatures up to 1200°C and oil, grease, fuel and water lubrication
  • 3D surface topography
  • Optical microscopy
  • Scanning Electron Microscopy with EDS analysis
  • 2D and 3D profilometry
  • AFM (Atomic Force Microscope for providing a topography image with nanometer resolution, in 3D)
  • Nano hardness tester
  • Specialized software (hertz pressure, oil film thickness, etc.)
  • Conductivity
  • Wetting, measurement of surface energy, cleanliness measurement using Coronasurf™ technology
  • Corrosion resistance