De-Coating of PVD
PVD coated tooling today form an integral part of machinery and equipment to improve wear resistance, improve productivity and to provide better part quality. PVD coatings are used often in applications such cutting tools, forming tools and dies and plastic injection moulding, amongst other.
Once worn the parts must be discarded or re-worked, including recoating. In many cases removal of the original coating before re-coating gives optimal results. Of importance is that the base material is not affected during the coating removal process, in order to preserve part integrity, tolerances, sharp corners and other fine details. The TD Coating Centre has added a de-coating system to achieve just this. We are able to de-coat both steels and tungsten carbides with minimal to zero surface damage.Parts can then be re-coated to give original performance.
Our solutions avoid cobalt leaching typically found when de-coating carbides and thus valuable cutting tools can be de-coated, re-sharpened and re-coated several times. Tests show virtually zero loss of Co from the tool surface after de-coating up to 6 times.
Materials readily de-coated are:
- All tool steels and mould steels
- Stainless steels, including martensitic types
- Carbide Tooling
Typical coatings that can be removed are TiN, TiAlN, TiCN, AlTiN, AlCrN, TiAlSiN, DLC and more.
For further information, please contact us.
De-Coating of TD
Stripping of TD can also be performed, however due to the nature of TD Coating applications(such as press and form tooling), when the coating is worn through a substantial rework of the underlying material is required. The coating is usually mechanically removed through blast media. A repolish is required.
Electro-chemical as well as chemical processes are also possible to strip TD for precision recoating.
Please enquire if you have a particular requirement.