Enhancement in the hardness and cutting ability of the abrasives for abrasive water jet by coating

ISSN 1121-7588

Dae Hyung Lee^a,b, Young Bea Kim^a, Se Woong Mo^c, Min Ho Kim^c, Chongmu Lee^d
^aDepartment of Mechanical Engineering, Chonnam National University, Kwangju, Republic of Korea
^bKUZCO LBE Co. Ltd., Incheon, Republic of Korea
^cDeerfos Co. Ltd., Incheon, Republic of Korea
^dDepartment of Materials Science and Engineering, Inha University, Incheon, Republic of Korea

Abstract

We have investigated the influence of coating of the abrasive particles with thermosetting or thermo-plastic resin on the cutting performance or lifetime of the abrasives both by a direct test using a AWJ system and by an indirect test using a sand belt. Our results show that the coated abrasives offer a shorter cutting time, a lower surface roughness of the cutting section, and a longer life time than the conventional abrasives. The impact strength of the coated abrasives has been found to be far higher than that of the conventional abrasives although there is little difference in hardness between the two kinds of abrasives. In addition, SiC abrasives have been found to be superior to Al₂O₃ abrasives in cutting performance.

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