25-27 April 2022
Conventum Conference Center
Europe/Vienna timezone

Analysis of the machining process in HVOF coating for Aluminum Die Casting Mold

27 Apr 2022, 09:50
20m
Room 2

Room 2

Oral Presentation Processing, machining & polishing Tool Steel Production, Processing, Machining & Polishing

Speaker

Anderson G. M. Pukasiewicz (Federal Technology University – Paraná)

Description

The objective of this work is to verify the machining process behavior of the Cr3C2 25NiCr HVOF coating. which can be used for the automotive, aerospace industries and naval, improving the sufarce finish of the thermal spray. The coating is machined with a 12mm diameter carbide ball nose tool, in which the tool is parallel to the surface, with a cutting speed of 100m/min, and a feed of 0.1mm/revolution, where the machining is carried out at an angle, between 1° and 2°, from the top of the coating to the substrate, in the zig zag, concordant and discordant directions. Before and after machining microhardness, optical profilometry and SEM tests were performed on the samples. After microhardness tests, it was verified a hardness increases of the coating after machining, probably due compression process carried out with machining. Optical profilometry and SEM observed that the surface showed a similar Ra, Rp and Rv, than substrate. A significant difference was observed on the Rv value, where the roughness the average valleys in the coating is much higher than substrate. This occurred because the machining process removes some lamellas from the sprayed coating.

Speaker Country Brazil

Primary author

Solmar I Chagas (Federal Technology University – Paraná)

Co-authors

Anderson G. M. Pukasiewicz (Federal Technology University – Paraná) Péricles S. Cancian (Federal Technology University – Paraná) Marcelo V. Carvalho (Federal Technology University – Paraná) Milton L. Polli (Federal Technology University – Paraná)

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