A Comparison of Precision Engineered Surface Coatings For Machine Tooling

Precision engineered components and tooling areConventional processes such as electroplating and
designed to perform under strenuous operatingphysical vapor deposition (PVD) are often used to
conditions with speed, precision, and reliability. Overdeposit metallic (Chromium or Nickel) or other
time, however, tiny imperfections and defects in thehard-coatings (TiN, CrN). But these conventional
tooling's surfaces can develop and will begin to causeprocesses both require pre-coating and post-coating
decreases in operating performance. These defectstreatments that add complexity and cost to the
are the result of abrasive wear of the surface causedprocess. Additionally, these conventional coating and
by friction, contact with corrosive materials, and manyplating processes operate at elevated temperatures
other operating conditions.that can distort dimensions and bulk properties of the
Cleaning, buffing and polishing are simple steps thatcomponents being coated.
can be taken to remove the corrosive particles andIon Beam Enhanced Deposition is a PVD and chrome
re-finish the surface. However, the manufacturingplating alternative process that is entirely physical in
operations must be shut down every time the toolingnature, rather than chemical or thermal. The IBED
needs to be polished, which can result in huge losses inprocess does not require pre-coating treatments or
productivity. Additionally, repeated use of polishing andpost-coating grinding or polishing. IBED coatings are
buffing chemicals can strip away layers of the surface,applied at temperatures that do not exceed 200
altering the precision dimensions necessary for optimaldegrees Fahrenheit, and no toxic chemicals are used
performance.or wastes produced. The end result is a high
A more effective long term solution is the applicationperformance coating that maximizes tooling
of coatings to maintain and/or enhance operatingperformance without compromising the original
performance. Precision coatings are able to increaseprecision dimensions, surface finishes, or bulk material
tools' resistance to abrasive wear and maintain theproperties.
original surface integrity.