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Metallographic Analysis of the Dead Metal Zone In Metal Cutting With a Rounded-Edge Tool

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Published/Copyright: August 12, 2013
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Abstract

The experimental results show that a small dead region is seen in front of the rake face during cutting with a rounded-edge cutting tool. Although this fact was accepted, metallographic analysis of the dead metal zone had never been conducted. A quick stop device was used to obtain chip root samples that are representative of the deformation taking place during dynamic (actual) cutting conditions. A metallographic analysis was performed on selected specimens to identify the microstructure and formation. The photomicrographs were analyzed and an effort made to explain the dead metal zone microstructure.

Kurzfassung

Versuchsergebnisse zeigen, dass beim Schneiden mit einem Werkzeug mit abgerundeter Kante ein kleiner toter Bereich vor der Spanfläche zu erkennen ist. Auch wenn diese Tatsache hingenommen wird, wurde die „dead metal zone“ niemals metallographisch analysiert. Zur Herstellung von Spanwurzelproben wurde eine Schnellstoppeinrichtung verwendet. So hergestellte Proben sind repräsentativ für die Verformung, die während der dynamischen (tatsächlichen) Schneidebedingungen ablaufen. Ausgewählte Proben wurden zur Identifizierung ihrer Mikrostruktur und Bildung metallographisch analysiert. Die Mikroaufnahmen wurden analysiert und es wurde versucht, die Mikrostruktur der „dead metal zone“ zu erklären.

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Received: 2013-8-18
Accepted: 2013-1-9
Published Online: 2013-08-12
Published in Print: 2013-05-15

© 2013, Carl Hanser Verlag, München

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