Selflubricating hard coatings: at low temperature a layer of an amorphous diamant carbon is applied on finished parts.

Features: in order to obtain the best compromise between wear resistance (which is related to high hardness) and selflubricating properties the parts are put in a PACVD (plasma assistant chemical vapor deposition) vacuum furnace. On top of the low friction in the boundary lubrication regime this low friction coefficient is available in contact with a wide variety of materials. Even those which tend to galling and seizing, for instance aluminium, titanium, stainless steel, etc.

Applications:

  • MECHANICAL PARTS:
    high precision friction parts
    parts subject to high pressure, for instance bearings and gears
    dry lubrication or in hydrodynamic lubrication regimes in contact with lubricants with low lubrication properties
    sliding and friction in abrasive conditions
    friction applications in vacuum
  • TOOLS:
    forming and cutting tools for light metals
  • HARDNESS:
    1500 to 3500 HV depending from composition and applications
  • THICKNESS:
    1 to 5 µm application dependent
    perfect and constant film thickness
  • TEMPERATIRE RANGE:
    up to 250° C
  • OTHER FEATURES:
    respect of tolerances and surface roughness
    perfect chemical inertness, solvant and acid resistant
    temperature range up to 300°C-350°C
    colour: black
  • QUALITY OF D.L.C. COATED PARTS:
    higher wear resistance in abrasive and adhesive wear conditions
    lower coefficient of friction up to 0,01 in vacuum
    better performance against galling and seizing: no adhesion, no pickup
    better wear resistance even in closed tolerances, no other lubrication required
  • MATERIALS TO TREAT:
    metals, light metals, steel, aluminium, hardmetals
  • PRECAUTIONS:
    the surface roughness should be as low as possible
  • INFLUENCE OF THE COATING ON THE WEAR PROPERTIES:
    example of the results contact steel to aluminium
    the pin disc test – dry friction
    P.V.: 1 MPa.m.s.ˉ¹