Reactivity of carbon based materials for powder metallurgy parts and hard metal powders manufacturing
Journal article, 2016

Carbon is a key element for powder metallurgy. For example, carbon is the basic alloying element in PM sintered steel, and carbon powders are used as a carbon source for the production of hard metals. However, there are only a few studies about the mechanisms of carbon dissolution and reactivity in dependence on the carbon sources with solid metals/oxides. This work presents the effect of the carbon source (different graphite and carbon black types) on the reactivity and efficiency of oxides reduction during the sintering of PM steels and on the synthesis of nanocrystalline WC powders. This experimental work sets the basis for optimizing the production of PM steel parts and nano-WC powders based on raw material selection and process conditions.

Graphite

Powder metallurgy

Reactivity

Carbon black

Hard metal

Author

Raffaele Gilardi

Imerys

Luigi Alzati

Imerys

Raquel Oro

Vienna University of Technology

Eduard Hryha

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Lars Nyborg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Sigurd Berg

Höganäs

L Radicchi

Sigmacarb SA

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

0532-8799 (ISSN)

Vol. 63 7 548-554

Subject Categories

Metallurgy and Metallic Materials

Areas of Advance

Materials Science