Sintering of grey cast iron powder recycled via jet milling

Atmospheric temperature; Cast iron; Hardness; Iron powder; Iron powder metallurgy; Milling (machining); Scrap metal reprocessing; Self lubricating bearings; Argon atmospheres; Diffusion process; Grey cast iron; Hardness values; Jet milling; Self-lubricating; Sintered density; Sintering temperatures; Sliding properties; Solid state sintering; Sintering

Abstract :

[en] Porous grey cast iron powder metallurgy parts were made from grey cast iron powder manufactured via target jet milling of machining scraps. The powders were used in the as-milled state without any further physical or heat treatment. Sintering was conducted at 1025, 1100 and 1175°C in an argon atmosphere and the effect of sintering temperature on microstructure, sintered density and apparent hardness of the grey cast iron specimens pressed to 5.8g/cm3 was investigated. Although diffusion processes were partially activated at 1025°C, it was determined that a temperature of 1175°C proved to be the ideal temperature for solid state sintering of grey cast iron parts. The hardness value and sintered density for the specimens sintered at 1175°C were found to be 96 BHN and 6.1g/cm3 (around 15% porosity) respectively, all of which lends itself to promising properties for making self-lubricating bearings and parts with sliding properties. © 2012 Elsevier Ltd.

Disciplines :

Materials science & engineering

Author, co-author :

Emadi Shaibani, M.; School of Metallurgy and Materials Eng., University College of Eng., University of Tehran, Tehran, Iran

Eshraghi, Nicolas ; Université de Liège > Département de chimie (sciences) > LCIS - GreenMAT

Ghambari, M.; School of Metallurgy and Materials Eng., University College of Eng., University of Tehran, Tehran, Iran

Language :

English

Title :

Sintering of grey cast iron powder recycled via jet milling

Publication date :

2013

Journal title :

Materials and Design

ISSN :

0264-1275

eISSN :

1873-4197

Publisher :

Elsevier Ltd

Volume :

Pages :

174-178

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 17 July 2015

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