Quality
Waterjet Newsletter – 01/23/2007
Impact of Abrasive Type on AWJ Cutting Efficiency and
Nozzle Wear Typical abrasive used in AWJ
cutting is almandine garnet. There are many different sources of almandine
garnet around the world. The impact of abrasive type on AWJ cutting
efficiency and nozzle wear is a common concern. Foldyne
et al.*’s research study on this subject was published in a 2001 paper and
here is a review of this paper. Their experimental study compared three different types of garnet and one type of Olivine abrasive to the reference garnet Barton HP80. Cutting tests were done on wedge shaped samples of mild steel and granodiorite rock. The average value of maximum depths of 5 cuts was used as the cutting performance indication. Nozzle weight loss within 2 hours of cutting was used to predict nozzle life. Barton HP80 garnet was used as the reference abrasive for comparison. Below is a summary of selected data.
Authors conclude: Coarser
abrasives are more efficient in cutting granodiorite
rock than cutting mild steel; Olivine is more efficient in cutting mild steel
than cutting granodiorite rock; No. II and III
garnet types have up to 25% improvement in nozzle life while Olivine can have
as much as 9 times of nozzle life improvement over garnet. * Foldyne, J., Martinec, P.,
& Sitek, L. (2001) Testing of mineral types of
abrasive for abrasive water jet cutting, in Mohamed Hashish (ed.),
Proceedings of the 2001 WJTA American Waterjet Conference, Minneapolis,
Minnesota, August 18-21, Paper 22. Beyond High
Pressure
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