메뉴 건너뛰기

Surface Treatment

Home> Technique> Surface Treatment

What’s surface treatment?

Metal has the property to cause corrosion which is the factor to lower the mechanical and physical properties when it contacts oxygen in the air.
Surface treatment is the process to prevent contact of metal with oxygen by forming several materials including polymeric film, oxide film, and metal film.
If the surface treatment process is done on products, their corrosion is prevented and their mechanical and physical properties are improved.
Recently surface treatment has been done to improve tone and illumination of metal surface with the mechanical and physical properties of products.

Surface treatment

CVD(Chemical Vapor Deposition)

CVD means chemical vapor deposition in a real sense of the word.
Adhesive strength of this process is excellent. And vapor deposition
can be uniformly done on complex forms of boards. Deposition of high
purity materials is easy. And because partial deposition is possible
by selecting the parts that you want on special forms of boards,
it is being used as one of the most useful methods. And this process is
variously used in several industries including wear resistance and
corrosion-resisting coating. For the basic principle of CVD,
deposition is done through high temperature decomposition or high
temperature chemical reaction. Because high temperature is required .
for smooth reaction at this moment, CVD process is usually done
at high temperature of about 1000°C.

PVD ( Physical Vapor Deposition)

Plasma-assisted physical vapor deposition (PAPVD) can be the generic
term of the physical vapor deposition which uses glow discharge to
improve film properties. Ion plating is the deposition process which uses
plasma like sputtering. But as it usually accelerates materials for
deposition with the boards that negative voltage is applied by ionizing it
with reactive gas or inert gases after the meteorological phenomena
is done by the evaporation system unlike sputtering, the surface of
boards or coating film collide with generated ions and neutral atoms
including high energy generated in the ionization process.
Adhesive strength of ion-plating is more improved than that of the existing
physical deposition process because of collision with particles with high
energy. And it has the advantage which can get uniform film by the shot
effect of gas and revolution of boards.

Coating type

Nitriding

- Plasma nitriding is the method to form compound layers and diffuse
  layers on the surface by activating surface penetrating of atoms as
  glow discharge is generated around base plates if voltage is applied
  between the route which affects the positive and negative poles and the
  ones which work by the cathode by injecting gas into the vacuum
  atmosphere of the internal route.

Features of R-NITRIDING

  • 1. Controls chipping in the corners of molds or tools.
  • 2. Obtains the mechanical properties which meet purposes by
       adjusting compound layers through control of the gas ratio.
  • 3. Process can be omitted because there is few porous
       layer (white layer).
  • 4. There are few changes in surface illumination.
  • 5. Nitriding, complex treatment, and partial nitriding of special metal
       including SUS and Ti are possible.
  • 6. The treatment temperature is -480 degrees. For alloy tool steel, high
       tempering products only can be treated.
top버튼