Abstract
This work reports on a technical feasibility and establishment of a process window for decoating of Chromium Titanium Aluminium Nitride (CrTiAlN) coating from steel substrates by laser stripping. CrTiAlN coating has a high hardness and oxidation resistance and finds application in cases such as cutting tools. The motivation for removing such coatings is to facilitate reuse of tooling by enabling regrinding or reshaping before recoating and hence promote sustainable material usage. Laser stripping was performed using an excimer laser. The effect of laser fluence, number of pulses, frequency, scanning speed and beam overlap distance on the decoating performance was investigated in detail. In this work, the effectiveness of the laser stripping process was evaluated in terms of the ability to remove CrTiAlN with minimal damage to the substrate and surface quality. Successful laser removal of CrTiAlN coating without noticeable damage to the steel substrate was demonstrated. In addition, the surface finish after decoating was comparable to that of the uncoated material.
Original language | English |
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Pages | 232-240 |
Number of pages | 9 |
Publication status | Published - 1 Dec 2008 |
Event | ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics - Temecula, CA, United States Duration: 20 Oct 2008 → 23 Oct 2008 |
Conference
Conference | ICALEO 2008 - 27th International Congress on Applications of Lasers and Electro-Optics |
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Country/Territory | United States |
City | Temecula, CA |
Period | 20/10/08 → 23/10/08 |
Keywords
- Chromium Titanium Aluminium Nitride
- Laser ablation
- Laser decoating