Authors:
Theophile Vié (Laboratoire 3SR, France),
Barthelemy Harthong (Laboratoire 3SR, France),
Philippe François (Rio Tinto Fer et Titane, Canada),
Jean Reid (Hl Blachford Ltd, Canada),
Jürgen Voglhuber (Miba Sinter Austria GmbH, Austria),
Vincent Paris (Rio Tinto Fer et Titane, Canada),
Robert Hellein (Miba Sinter Austria GmbH, Austria)
Abstract:
Frictional characteristics of an iron-based mixture were studied using a specifically designed friction test bench allowing (after prior compaction) the measurement of the friction coefficient during the sliding of a compact on a bar simulating the die surface. Temperature and sliding speed were controlled. An experimental campaign was conducted with four high-performance lubricants and a conventional EBS wax, based on a single FL-4400 mix formulation. The experimental parameters included: mix temperatures from 40 to 80°C; density of 7.20g|cc; normal pressure between 150 and 240MPa; sliding distance 80mm; sliding velocity 20mm.s-1. The analyses focused on the evolution of the friction coefficient and the compact’s surface degradation. After multiple repetitions, a steady state was established with a sliding distance beyond which degradation became critical. The degradation depended on the lubricant and experimental conditions. This study aims at better understanding how the friction coefficient evolves during the ejection of a production part.
DOI:
https://doi.org/10.59499/WP225366255