Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Oxygen Removal during Sintering of Steels Prepared from Cr-Mo and Mo Prealloyed Powders

  • Danninger, Herbert (Institute of Chemical Technologies and Analytics, Vienna University of Technology) ;
  • Xu, Chen (Institute of Chemical Technologies and Analytics, Vienna University of Technology) ;
  • Lindqvist, Bjorn (Hoganas AB)
  • Published : 2006.09.24
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Abstract

The removal of oxygen during sintering by carbothermic reduction was studied for steel compacts Fe-Cr-Mo-C and Fe-Mo-C prepared from prealloyed powders. The compacts were prepared by pressing at 600 and 1000 MPa and sintering at 1100 and $1300^{\circ}C$ in vacuum. It showed that for the Cr-Mo steel, deoxidation strongly depends on the sintering temperature, in contrast to the plain Mo steel; at $1300^{\circ}C$ very low oxygen levels were measured with the standard density compact while at high density still significant oxygen is contained. This indicates inhibition of final deoxidation by pore closure, but apparently without adverse effect on the mechanical properties.

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