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PM parts sintered state improvement achieved by carbon source selection

L. Alzati ; R. Gilardi ; Eduard Hryha (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Aimn Hadhud (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Lars Nyborg (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik)
2013 International Conference on Powder Metallurgy and Particulate Materials, PowderMet 2013 p. 516-524. (2013)
[Konferensbidrag, refereegranskat]

In this work primary synthetic graphite, natural graphite and carbon black as carbon sources for PM parts sintering are compared. In order to highlight the different behaviour in demanding applications, special focus is on Cr-alloyed PM steels. Interrupted sintering trials have been run on specimens that were analysed both by advanced techniques (HR SEM, EDX) and Light Optical Microscopy, highlighting how sintering process rate can be positively affected by carbon source selection. Confirmation from tests run on Iron-Copper-Carbon is also presented. Implications for production of different typologies of PM parts is are also discussed. Test results on Key properties like Dimensional Stability (within one lot and lot-to-lot), Mechanical Performance (in terms of macro-Hardness, Tensile Rupture Strength) and solid-state Lubrication are also displayed.

Nyckelord: graphite, carbon black, alloyed sintered steels, carbon dissolution, surface oxide, oxide reduction

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Denna post skapades 2014-01-07. Senast ändrad 2014-01-08.
CPL Pubid: 191508


Institutioner (Chalmers)

Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik (2005-2017)


Hållbar utveckling
Metallurgi och metalliska material

Chalmers infrastruktur