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How sintering time and temperature influence fatigue

Einfluß der Sinterzeit und Temperatur auf das Schwingfestigkeitsverhalten

	Metal Powder Report 49 (1994), No.5, pp.30-36 : Abb.,Tab.,Lit. ISSN: 0026-0657

	English
	Journal Article
	Fraunhofer LBF ()
	Bruchmechanik; Festigkeitsverhalten; fracture mechanic; Gefüge; microstructure; powder metallurgy; Pulvermetallurgie; sintered steel; Sinterstahl; strength behaviour; temperature effect; Temperatureinfluß; time effect

Abstract
Mechanical properties of the diffusion alloyed PM' steel Fe-4.0 percent Ni-1.5 percent Cu-0.5 percent Mo+0.6 percent (Ultrapac LE + 0.6 percent C) at the density of 7.1 g/cbcm sintered at 1120 degree Celsius/30 min, 1120 degree Celsius/120 min, 1250 degree Celsius/30 min and 1250 degree Celsius/120 min, were investigated. Fatigue and fracture mechanical properties are significantly improved by the increase of sintering time and temperature due to a better microstructural homogeneity and improved pore's shape. However, as a sintering time of 120 minutes is too long for an industrial mass production the high- temperature sintering at 1250 degree Celsius for a minimum of 30 minutes can be recommended for the manufacture of highly stressed PM' parts.

: http://publica.fraunhofer.de/documents/PX-17518.html