TRD YÖNTEMİYLE SUPAP ÇELİĞİ YÜZEYİNDE ÜRETİLEN KAPLAMALARIN MİKROYAPI VE AŞINMA ÖZELLİKLERİ

Year 2016, Volume: 11 Issue: 3, 75 - 85, 14.07.2016

SERKAN Islak , CİHAN Özorak , CİHANGİR TEVFİK Sezgin , MEHMET Akkaş

Abstract

Bu çalışmada, kullanım yeri itibariyle sürekli aşınmaya maruz kalan supapların Termoreaktif Difüzyon (TRD) tekniği kullanılarak karışık nitrür esaslı kaplamalarla ile kaplanması ve mikroyapı özelliklerinin incelenmesi gerçekleştirilmiştir. Bu amaçla, supap yüzeyine önce nitrürasyon işlemi uygulanmıştır ve sonra TRD yöntemiyle supap yüzeyine bor geçiştirilmiştir. Üretilen kaplamaların mikroyapı ve faz bileşimi incelemesi, taramalı elektron mikroskobu (SEM), X-ışın difraktogramı (XRD), X ışını enerji dağılım spektrometresi (EDS) ile yapılmıştır. Kaplamaların sertlikleri vikers olarak ölçülmüştür. Kaplamaların aşınma davranışı, tüm numunelere aynı koşullarda uygulanan ball on disk aşınma testleri yapılarak karşılaştırılmıştır. Kaplamaların sürtünme katsayıları nispeten düşük çıkmıştır. 

Keywords

TRD, Kaplama, Supap, Mikroyapı, Aşınma

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