Surface Damaging of Brass and Steel Pins when Sliding over Nitrided Samples Cut by Finishing and Roughing EDM Conditions
Fecha
2020-07-17Autor
Martynenko, Vasily
Martinez Krahmer, Daniel
Napoles, Amelia
Cabo, Amado
Perez, Daniela
Figueras, Enrique
Rojas, Hernan
Sanchez Egea, Antonio
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In the forging industry, surface quality and surface treatments of dies are crucial parameters
to extend their life. These components are usually machined by milling or by Electrical Discharge
Machining (EDM), and the final surface roughness depends on the machining techniques and
operational conditions used in its fabrication. After milling, a nitriding treatment is widely applied
to extend its service life. Nevertheless, no scientific report that informs about nitriding after EDM
has been found. Accordingly, this work focuses on the wear and friction behavior of pins made of
brass and medium carbon steel sliding over AISI H13 discs, made by wire EDM in the conditions of
finishing and roughing. The discs are plasma nitride, and their e ect on the wear during pin-on-disc
tests is evaluated. In this sense, the analysis of the surface damage for the di erent pins will help us
to understand the service life and wear evolution of the forging dies. The results show that plasma
nitride reduces the friction and prevents the degradation of the pin, independently of the material of
the pin, when sliding over finishing and roughing EDM conditions