Prediction of particle size for water atomised metal powders: parameter study
2012 (English)In: Powder Metallurgy, ISSN 0032-5899, Vol. 55, no 1, 45-53 p.Article in journal (Refereed) Published
This work aims to investigate how some significant atomising parameters influence the mass median particle size d50 of water atomised metal powders. More specifically, these were water pressure, melt flowrate, water jet angle, liquid metal viscosity and surface tension. Existing models for the prediction of d50 during water atomisation were reviewed. The selected models were fitted and compared with atomising experiments of liquid iron containing 0.5–4.4%C. Experimental results and model calculations were used in a parameter study to investigate how the different parameters influenced d50. The effect on d50 was large for the water pressure, medium for the viscosity and low for the melt flowrate and surface tension. Model calculations indicate that the jet angle has a large effect on d50, which should be verified by additional studies. The model proposed by Bergquist (B. Bergquist: Powder Metall., 1999, 42, 331–343) showed the best agreement with the current experimental data.
Place, publisher, year, edition, pages
2012. Vol. 55, no 1, 45-53 p.
Powder metallurgy, Modelling, Water atomisation, Metal powder, Particle size
Metallurgy and Metallic Materials
IdentifiersURN: urn:nbn:se:kth:diva-53622DOI: 10.1179/1743290111Y.0000000016ISI: 000302546300008OAI: oai:DiVA.org:kth-53622DiVA: diva2:470489
QC 201205282011-12-292011-12-292012-05-29Bibliographically approved