Abstract
In this study, the sliding wear behaviour of non-aged and aged Cu-Cr-Zr alloy specimens were investigated. The specimens were aged for 2 h at the temperatures of 450 °C and 475 °C. Prior to the wear tests, microstructural examinations and hardness measurements were performed on all Cu-Cr-Zr alloy specimens. The wear tests were performed on a pin-on disk type wear apparatus at the sliding speeds of 0.5 ms−1, 1.0 ms−1 and 1.5 ms−1 as well as under 40 N applied load. After the wear tests, the worn surfaces of all samples were analyzed by SEM and energy dispersive X-ray spectroscopy (EDS). The experimental results indicated that aging heat treatment led to increase in the hardness values of Cu-Cr-Zr alloys and the highest wear loss was observed for non-aged specimens. With increasing sliding speed, the wear loss increased to a maximum value beyond which it decreased.
Abstract
In der diesem Beitrag zugrunde liegenden Studie wurde das Verschleißverhalten von gealterten und unbehandelten Proben einer Cu-Cr-Zr Legierung untersucht. Die Proben wurden hierfür über zwei Stunden bei Temperaturen von 450 °C und 475 °C gealtert. Vor den Verschleißversuchen wurde die Mikrostruktur aller Proben untersucht und ihre Härte gemessen. Die Verschleißversuche wurden mit einer Einrichtung des Stift-Scheibe-Typs bei Gleitgeschwindigkeiten von 0,5 ms−1, 1,0 ms−1 und 1,5 ms−1 sowie mit einer Kraft von 40 N durchgeführt. Nach den Versuchen wurden die verschlissenen Oberflächen mittels REM und energiedispersiver Röntgenspektroskopie (EDX) untersucht. Die experimentellen Ergebnisse zeigen, dass die Alterungswärmebehandlung zu einem Härteanstieg der Cu-Cr-Zr Legierungen führt sowie die größten Verschleißverluste an den unbehandelten Proben beobachtet wurden. Mit zunehmender Gleitgeschwindigkeit nahm der Verschleißverlust bis zu einem Maximum zu, um danach wieder abzufallen.
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