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Licensed Unlicensed Requires Authentication Published by De Gruyter October 1, 2014

Wear Characteristics of Circular cBN/Diamond Saws Produced by Hot Pressing

Verschleißcharakteristika von heißgepressten cBN/Diamantkreissägen
Serkan Islak, Durmuş Kır and Halis Çelik
From the journal Materials Testing

Abstract

This study describes the investigation of wear characteristics of circular cBN/diamond saws produced by hot pressing. In order to determine the usability of cBN instead of diamond, cBN and diamond grains were added to the bronze matrix. Production of the saws was performed at a sintering temperature of 600–700 °C for a sintering time of 3 minutes. Sawing tests were carried out to determine the wear characteristics of the saws by sawing natural stone. It is concluded that cBN together with diamond could be added to the matrix with a concentration of 12 (the rest of concentration of 30 is diamond) and that the saws will have more wear if this concentration is exceeded. After sawing, SEM analyses of the saws indicate that there were more fractures and wear in cBN grains in comparison to the diamond grains. The results concluded that cBN can be used to saw softer natural stones, or can be added to the matrix together with diamond.

Kurzfassung

Die diesem Beitrag zugrunde liegende Studie beschäftigte sich mit der Untersuchung der Verschleißcharakteristika von heißgepressten cBN/Diamantkreissägen (cBN – kubisches Bornitrid). Um die Verwendbarkeit von cBN anstelle von Diamant zu ermitteln, wurden entsprechend cBN- und Diamantkörner zur Bronzematrix zugegeben. Die Produktion der Sägen erfolgte bei einer Sintertemperatur von 600 °C bis 700 °C über eine Zeitdauer von drei Minuten. Es wurden Sägeversuche an Naturstein durchgeführt, um die Verschleißcharakteristika der Sägen zu ermitteln. Es stellte sich heraus, dass cBN zusammen mit Diamant bis zu einer Konzentration von 12 (der Rest der Gesamtkonzentration 30 besteht aus Diamant) zugegeben werden kann und dass die Sägen einen höheren Verschleiß aufweisen, wenn diese Konzentration überschritten wird. REM-Analysen der Sägen nach Sägeeinsatz zeigte, dass sich mehr Risse und Verschleißerscheinungen in den cBN-Körnern als im Vergleich zu den Diamantkörnern zu beobachten waren. Die Ergebnisse lassen darauf schließen, dass cBN zum Sägen weicherer Natursteine verwendet werden kann oder zur Matrix zusammen mit Diamant hinzugegeben werden kann.


* Correspondence Address, Assist. Prof. Dr. Serkan Islak, Kastamonu University, Faculty of Engineering and Architecture, Department of Materials Science and Nanotechnology Engineering, Kastamonu, Turkey, E-Mail:

Dr. Serkan Islak graduated from Metallurgy Education Department in Firat University, Elazig, Turkey, in 2002. He holds MSc and PhD at Firat University, Elazig, in 2005 and 2012, respectively. He is Asst. Professor at the Department of Materials Science and Nanotechnology Engineering, Faculty of Engineering and Architecture, Kastamonu University, Kastamonu, Turkey. His main interests include powder metallurgy and surface coating technologies.

Dr. Durmuş Kır graduated from Department of Mechanical Engineering in Karadeniz Technical University, Trabzon, Turkey, in 1987. He received his MSc in 1993, at Yildiz Technical University and completed PhD in 2012 at Firat University, Turkey. He is instructor at the Hereke Vocational High School, Mechanical Department of Kocaeli University, Kocaeli, Turkey. His main interests include powder metallurgy, heat treatment, and machining technologies.

Prof. Dr. Halis Çelik graduated from Department of Mechanical Engineering in Firat University, Elazig, Turkey, in 1976. He received his MSc in 1984, at Yildiz Technical University and completed PhD in 1990 at Istanbul Technical University, Turkey. He is professor at the Technology Faculty, Department of Metallurgy and Materials Engineering, Firat University, Elazığ, Turkey. His main interests include mechanical metallurgy and machining technologies.


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Published Online: 2014-10-01
Published in Print: 2014-03-03

© 2014, Carl Hanser Verlag, München

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