Installation of vacuum spraying of strengthening coatings (UVN, PVD)
Application, technology and practical results
Vacuum spraying units (UVN type) are used for applying functional coatings that increase wear resistance, heat resistance and stability of parts and tools.
PVD (Physical Vapor Deposition) technologies make it possible to form coatings with a thickness of about 0.1–7 microns with high adhesion and controlled structure, which makes them an effective tool for increasing the life of products without changing their geometry.
Technologies and Offers LLC is engaged in the development and implementation of such solutions, specializing in the modernization and creation of vacuum installations for specific production tasks.
Technological features of vacuum spraying
The process includes:
- creating a vacuum environment
- evaporation of the material (cathodes, targets)
- transfer of particles to the product surface
- coating formation
Key process parameters:
- vacuum level
- substrate temperature
- composition of the working atmosphere
- Discharge mode
The control of these parameters determines:
- coating structure
- adhesion
- internal stresses
- Operational characteristics
The main types of coatings
The following groups of coatings are used in installations for vacuum spraying of reinforcing coatings:
TiN (titanium nitride)
- hardness ~2000 HV
- reduction of the coefficient of friction
- base coating for the instrument
TiAlN /AlTiN
- High temperature resistance
- oxidation resistance
- application at high cutting speeds
CrN (chromium nitride)
- increased corrosion resistance
- resistance to adhesive wear
Multi-layered systems
- alternating layers with different properties
- increased crack resistance
Application practice
Cutting tools
When applying TiN or TiAlN coatings to milling cutters and drills, it is observed:
- increasing the durability of the tool by 2-3 times
- increasing the permissible cutting modes
- reduction of heat load
Molds and dies
The use of CrN coatings allows:
- reduce wear on work surfaces
- reduce the likelihood of bullying
- improve the stability of product geometry
Functional coatings
In a number of applications, vacuum spraying is used to:
- creating barrier layers
- improving corrosion resistance
- formations
