Barış Mustafa POYRAZ, Ahmet Tuncay ŞİMŞEK, Adnan AKKURT

Co2B Nanopartikülleri ile Kaplanmış S235JRC Karbon Çelik Malzemelerin Farklı Kesme Yöntemleri ile İşlenebilirlik Özelliklerinin Araştırılması

Makine imalat sanayinde makine parçalarına genellikle nihai şekil verildikten sonra kaplama işlemi uygulanmaktadır. Ancak kimi zaman parçaların kesme işlemleri ile yeniden şekillendirilmesi gerekebilmektedir. Bu gibi durumlarda kaplama tabakasına zarar vermeden ya da en az zararla işlemin gerçekleştirilebilmesi için seçilen kesme yöntemi büyük önem arzetmektedir. Bu çalışmada, mekanokimyasal yöntemle sentezlenen Co2B nanopartiküller kullanılarak CO2 lazeri ile S235JRC (St37-2) malzeme yüzeyine kaplama yapılmıştır. Kaplanmış numunelerin işlenebilirlik karakteristiklerini belirleyebilmek amacıyla numuneler sırasıyla aşındırıcı su jeti, tel erozyon, aşındırıcı disk ve lazerle kesilmiştir. Kesme işlemleri ile elde edilen yüzey özellikleri değerlendirildiğinde, Co2B nanopartikülleri kullanılarak kaplanmış çelik malzemenin işlenmesinde en uygun yöntemin aşındırıcı diskle kesme olduğu tespit edilmiştir. Kaplama karakterizasyonu ve metalografik incelemelerde X ışını kırınımı (XRD), taramalı elektron mikroskobu (SEM), optik mikroskop ve mikrosertlik test cihazı kullanılmıştır.

Anahtar Kelimeler:

Yüzey özellikleri, işlenebilirlik, nano kaplama, Co2B, mekanokimyasal yöntem

Investigation of the Machinability Properties of Co2B Nanoparticles Coated S235JRC Carbon Steel Materials with different cutting methods

In the machine manufacturing industry, machine parts are generally coated after taking their final shape. However, in some cases it may be necessary to reshape the parts obtained in this way with cutting operations. In such cases, the cutting method chosen is of great importance to carry out the process with minimum damage or without damaging to the coating layer. In this study, Co2B nanoparticles synthesized by mechanochemical method were coated to the surface of S235JRC (St37-2) material by CO2 laser. In order to determine the machinability characteristics of the coated layers, samples were cut with abrasive water jet, wire-electrical discharge machining, abrasive disc and laser, respectively. When the surface properties obtained by the cutting process are evaluated, it is determined that the abrasive disc cutting is the most suitable method for Co2B nanoparticle coated S235JRC (St37-2) materials. The characterization and metallographic investigations of the coating layers were carried out with X-Ray diffraction spectroscopy (XRD), scanning electron microscopy (SEM), optical microscope and micro hardness tester.

Keywords:

Surface properties, machinability, nano coating, Co2B, mechanochemical method,

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