The Influences of Compacting Pressure and Sintering Temperature on Elastic Moduli of Sintered Irons

The effects of compacting pressure and sintering temperature on elastic moduli of sintered irons for reduced and atomized iron powders were investigated. The elastic moduli were mainly depended on porosity. The porosity decreased exponentially with increasing compacting pressure and was independent...

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Veröffentlicht in:TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 2002/05/25, Vol.68(669), pp.794-800
Hauptverfasser: HIROSE, Norimitsu, TANAKA, Shin-ichi, TANAKI, Toshiyuki, ASAMI, Junichi
Format: Artikel
Sprache:eng ; jpn
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Zusammenfassung:The effects of compacting pressure and sintering temperature on elastic moduli of sintered irons for reduced and atomized iron powders were investigated. The elastic moduli were mainly depended on porosity. The porosity decreased exponentially with increasing compacting pressure and was independent on sintering temperature. However, hecause the pore surface becomes smooth and the open porosity decreases with increasing sintering temperature, Young's modulus and shear modulus increased slightly at the equal porosity. It is clarified that the critical porosity exists where the downtrend of elastic moduli changes and increases with sintering temperature. Furthermore, the new equations of elastic moduli against kinds of iron powder, compacting pressure and sintering temperature that can be controlled on manufacturing of sintered parts, were deduced. The good correlation between calculated data by using of the equation with considering of the critical porosity and experimental data was obtained.
ISSN:0387-5008
0025-6501
1884-8338
1943-5649
DOI:10.1299/kikaia.68.794