PTA YÖNTEMİ İLE GERÇEKLEŞTİRİLEN FE-CR-W-B-C KOMPOZİT KAPLAMASININ MİKROYAPI VE MEKANİK ÖZELLİKLERİ

Year 2016, Volume: 11 Issue: 4, 171 - 184, 13.10.2016

TURAN Gürgenç , CİHAN Özel

Abstract

Bu çalışmada, düşük karbonlu AISI 1020 çeliğinin yüzeyi Fe-Cr-W-B-C kompozit kaplamasıyla plazma transfer ark (PTA) kaynak yöntemi kullanılarak kaplanmıştır. Kaplama tozu olarak ağırlıkça yüzde 80FeCrC-10FeW-10FeB ve 60FeCrC-20FeW-20FeB karışımları kullanılmıştır. Kaplamalar iki farklı ilerleme hızı (0.15 m/dk, 0.1 m/dk) ve akım değerinde (120 A, 160 A) gerçekleştirilmiştir. Kaplama işleminden sonra kaplama tabaları OM, SEM ve EDS ile incelenmiştir. Kaplanan numuneler mikrosertlik testine ve pin-on-disk aşınma testine tabi tutulmuştur. Fe-Cr-W-B-C ile AISI 1020 çeliğinin yüzeyinin PTA yöntemi kullanılarak sorunsuz şekilde kaplanabildiği tespit edilmiştir. Maksimum mikrosertlik değeri 1668 Hv_0.2 olarak ölçülmüştür. Fe-Cr-W-B-C ile yüzeyi kaplanmış AISI 1020’ nin aşınma direncinin ve sertliğinin kaplanmamış AISI 1020’ ye oranla daha yüksek olduğu tespit edilmiştir.    

Keywords

PTA Kaynağı, Fe-Cr-W-B-C Kaplama, Karbür, Aşınma, Mikrosertlik

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