Carbide coating physical vapor deposition (PVD) is a commonly used coating preparation technology used to form coatings on the surface of cemented carbide tools. It deposits coating material on the tool surface through a physical process rather than using a chemical reaction. PVD coating technology usually includes the following steps:
Cleaning and Pre-Treatment: The tool surface is cleaned and treated to ensure the surface is clean and suitable for coating adhesion.
Heating and evaporation: In a vacuum environment, the coating materials (such as titanium, chromium, nitride, etc.) are heated to high temperatures to evaporate them into steam or ions.
Deposition: The evaporated coating material is deposited on the tool surface to form a thin film. The deposition process can be achieved by different methods in physical vapor deposition technology, such as evaporation deposition, magnetron sputtering, arc discharge, etc.
Cooling and solidification: The deposited film rapidly cools and solidifies to form a carbide coating with the desired properties.
PVD coatings offer many advantages, including:
High hardness and wear resistance: PVD coating can significantly improve the hardness and wear resistance of tools and extend tool life.
Film uniformity: PVD coating can form a uniform and dense film on the tool surface, providing good coating performance and cutting quality.
Good adhesion: PVD coating can form good adhesion between the tool surface and the base material, reducing the risk of coating peeling off.
Superhard material coating: PVD coating technology can be used to prepare superhard material coatings, such as titanium nitride (TiN), molybdenum nitride (MoN), aluminum nitride (AlN), etc.
After PVD coating, carbide tools can provide better cutting performance, wear resistance and tool life, and are suitable for various cutting processes and industrial applications.
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