CVD Coatings - Chemical Vapor DepositionWe are pleased to provide Chemical Vapor Deposition (CVD) coating processes as part of our line of wear-resistant coatings. As one of the first companies in North America to provide CVD coating services, we are confident in our ability to provide superior CVD films. Our CVD coatings will unlock the full potential of your tools.
Chemical Vapor Deposition (CVD) is an atmosphere controlled process conducted at elevated temperatures (~1925° F) in a CVD reactor. During this process, thin-film coatings are formed as the result of reactions between various gaseous phases and the heated surface of substrates within the CVD reactor. As different gases are transported through the reactor, distinct coating layers are formed on the tooling substrate. For example, TiN is formed as a result of the following chemical reaction:
TiCl4 + N2 + H2 1000° C → TiN + 4 HCl + H2. Titanium carbide (TiC) is formed as the result of the following chemical reaction: TiCl4 + CH4 + H2 1030° C → TiC + 4 HCl + H2. The final product of these reactions is a hard, wear-resistant coating that exhibits a chemical and metallurgical bond to the substrate. CVD coatings provide excellent resistance to the types of wear and galling typically seen during many metal-forming applications.
CVD coatings are used in many manufacturing applications as a wear-resistant coating: carbide milling and turning inserts, wear components, some plastic processing tools, etc. However, the most common application for CVD coating is for metal-forming tools.
In high stress metal-forming applications, where the tool's tolerances and substrate permit, high temperature CVD coating processes will perform better than "cold" processes like PVD, thin-dense chrome (TDC), nitriding, etc. The chemical/metallurgical bonding that results from the CVD coating process creates adhesion characteristics that simply cannot be duplicated by a "cold" process. This enhanced adhesion protects forming tools from the sliding friction wear-out caused by the severe shearing stresses generated in heavy metal-forming applications.
Typical Metal-Forming Applications for CVD Coating: