Östemperlenmiş Küresel Grafitli Dökme Demirlerde XRD Yöntemiyle Yüksek Karbonlu Östenit Faz Hacim Oranını Belirlemede Yüzey Koşullarının Etkisi

Yıl 2020, Cilt: 9 Sayı: 1, 52 - 62, 01.06.2020

Burak Nalçacı , Volkan Kılıçlı , Mehmet Erdoğan

https://doi.org/10.17100/nevbiltek.644118

Cited By: 1

Öz

Bu çalışmada XRD
(X-Işınları kırınımı) yöntemiyle yüksek karbonlu östenit faz hacim oranı belirlenmesinde
yüzey koşullarının yüksek karbonlu östenit faz hacim oranı üzerine etkisi
araştırılmıştır. Böylelikle XRD analizinde uygun yüzey koşulunun belirlenmesi
hedeflenmiştir. Bu amaç doğrultusunda, alaşımlı küresel grafitli dökme demire 900°C’de
2 saat östenitleme ve 375°C’deki tuz banyosunda 2 saat östemperleme ve ardından
oda sıcaklığına havada soğutma işlemi uygulanmıştır.

Isıl işlem
sonrası dört eşit parçaya ayrılarak farklı yüzey koşullarında hazırlanan numuneler
optik ve SEM ile incelenmiş, XRD analizleri yapılmış ve makro sertlik ölçümleri
gerçekleştirilmiştir.

XRD
yöntemiyle yüksek karbonlu östenit faz hacim oranı ölçümlerinde farklı yüzey
koşullarının östenit faz hacim oranı ölçümü üzerinde oldukça etkili olduğu
gözlemlenmiştir. XRD yöntemiyle faz hacim oranı belirlenmesinde polisaj+dağlama
işleminin yüzey pürüzlülüğünü azalttığı için oldukça etkili olduğu tespit
edilmiştir.

Anahtar Kelimeler

Östemperlenmiş Küresel Grafitli Dökme Demir (ÖKGDD), Yüksek Karbonlu Östenit Faz Hacim Oranı, Yüzey Pürüzlülüğü, XRD (X-Işınları Kırınımı)

Teşekkür

XRD çalışmalarında yardımını esirgemeyen Dr. Meryem Polat Gönüllü’ye ve çalışmamızın gerçekleştirilmesinde kullanmış olduğumuz alt yapı ve laboratuvar imkânlarının kurulmasını sağlayan Gazi Üniversitesi Bilimsel Araştırma Projeleri birimine teşekkür ederiz.

The Effect of Surface Conditions in Determination of High Carbon Austenite Phase Volume Fraction by XRD Method in Austempered Ductile Iron

Öz

Kaynakça

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