| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 830039 | Materials & Design (1980-2015) | 2013 | 5 Pages |
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 5.8 g/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 6.1 g/cm3 (around 15% porosity) respectively, all of which lends itself to promising properties for making self-lubricating bearings and parts with sliding properties.
Graphical abstractSintering of grey cast iron compacts were conducted in 1025, 1100 and 1175 °C in argon atmosphere. Although diffusion processes were partially activated in 1025 °C, the temperature of 1175 °C proved to be the ideal temperature for solid state sintering of grey cast iron parts.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Grey cast iron sintered parts can be produced without the contribution of iron powder. ► Grey cast iron jet milled powders can be used in the as-milled state. ► 1175 °C is the ideal temperature for solid state sintering of grey cast iron parts. ► Absence of oxygen in the powders plays a major role in the successful sintering. ► Sintered parts possess promising properties for self-lubricating applications.
