EXPERIMENTAL INVESTIGATION OF THE TOOL-CHIP INTERFACE TMPERATURES ON UNCOATED CEMENTIDE CARBIDE CUTTING TOOLS

It is known that the temperature as the result of the heat developed during machining at the tool-chip interface has an influence on the tool life and workpiece surface guality and the methods for measuring this temperature are constantly under investigation. In this study, the measurement of tool-chip interface temperature using toolworkpiece termocouple method was investigated. The test were carried out on a AISI 1040 steel and the toolchip interface temperature variation was examined depending on the cutting speed and feed rate. The obtained groups show that cutting speed has more influence on the temperature than feedrate has

Östemperlenmi̇ş küresel grafi̇tli̇ dökme demi̇ri̇n aşinma davranişi üzeri̇nde pvd yöntemi̇ i̇le tin kaplamanin etki̇si̇

In this study, the effect of TiN coating by physical vapour deposition method on wear behaviour of austempered ductile iron was studied. For this purpose, austenitising at 900°C for 60 min and later austempering at 360 °C for 30 and 90 min was applied to the specimens. After heat treatment, the surfaces of these samples were coated TiN by PVD method. Wear tests were performed on pin-on-disc device under loads of 20 N, 40 N and 60 N, at linear sliding speed of 1m/sec and sliding distance of 1800 m. The experimental results show that pearlitic microstructure of ductile iron turned into ausferritic structure depending on heat treatment conditions. The wear of specimen was reduced 3-4 times by the effect of TiN coating

TiN Kaplanmış Östemperlenmiş Küresel Grafitli Dökme Demirde Pim Sıcaklığının Aşınma Davranışı Üzerine Etkisi

Bu çalışmada, TiN kaplanmış östemperlenmiş küresel grafitli dökme demirlerin aşınma davranışı üzerinde pim sıcaklığının etkisi incelenmiştir. Aşınma testleri 20, 40 ve 60 N yükler altında 1m/sn kayma hızında ve 1800 m kayma mesafesinde gerçekleştirilmiştir. Aşındırma sırasında pim numune sıcaklıkları, malzemenin sertliği ile artmıştır. TiN kaplamanın yüksek ısıl iletkenliğine sahip olması nedeniyle, ÖKGDD-TiN en düşük pim sıcaklığına sahiptir