Autori: T. Gläser, S. Bausch, C. Ruset, E. Grigore, T. Craciunescu, I. Tiseanu

Editorial: Plasma Processes and Polymers, 6-S1, p.S291-S296, 2009.

Rezumat:

During the application, the active surface of the forging dies is subjected to intense mechanical and thermal stresses combined with chemical oxidation. The fatigue resistance is an important characteristic which limits the service lifetime of the forging tools. This characteristic was significantly improved by a combined treatment between laser alloying/dispersing and plasma nitriding. This treatment was developed for W1.2365 and W1.2344 steels using TiC and WCtCo powders as additive materials. The surface layers have been examined by optical microscopy, glow discharge optical spectrometry (GDOS), energy dispersive X-ray (EDX), X-ray microtomography and other techniques. The combined treatment was successfully applied to a number of 13 forging tools from 4 European Companies, leading to an increase of their lifetime by factors ranging between 180 and 270%.

Cuvinte cheie: fatigue resistance, laser alloying/dispersing, plasma nitriding, optical microscopy, glow discharge optical spectrometry, energy dispersive X-ray, X-ray microtomography

URL: http://dx.doi.org/10.1002/ppap.200930706