Lunac 2+ applied to machine parts in translation
Originally Lunac 2+ was developed for this specific task, for which a high content of modified technical ceramics and a new kind of matrix had to establish optimal friction conditions and superb anti-cold weld properties. After 7 years of development we finally obtained a coating with these characteristics. Yet, apart from the perfect bond that can be established with the substrate, Lunac 2+ showed many other very interesting characteristics, as mentioned on the Lunac 2+ main page. In this application the superb anti-galling property of lunac 2+ (see the adhesive wear diagram), in combination with the low friction (see the |
coefficient of friction diagram) offers unique tribological improvements to parts that are normally nitrided. Not only sliding parts which encounter adhesive as well as abrasive wear, but also slightly moving/vibrating parts that suffer from tribo-oxidation and fretting will behave as massive ceramic parts in the case they are coated with semi ceramic Lunac 2+. The major advantages are the totally different and easier (cost saving) manufacturing procedures and the presence of elastic metals below the coating. Fairly often, machine concepts that cannot or hardly be lubricated become feasible because of Lunac 2+ coatings. |
The interior of this stainless steel valve (food dosing installation) has been coated with Lunac 2+ to protect this stainless steel part from galling and fretting and reduce the minimal allowable clearance. Lunac 2+ can very well be applied to small internal structures (+/- Ø 4 mm, length dependant).
Besides Lunac 1 non stick coatings applied to the conveying canals of displayed screen changers, thick Lunac 2+ coatings are often applied to the mechanical heavily loaded piston- and bore surfaces. A nitrided steel surface (e.g. DIN 1.8519 or 1.8550) normally develops scratches after a while, frequently followed by seizing. The Lunac 2+ coating proved to be a reliable concept to prevent parts from galling and seizing problems. A side effect of the Lunac 2+ non stick effect is that scales of hard thermally cracked plastic remnants will hardly develop between the pistons and cylinders.
Picture:
Kreyenborg
Germany
