Östemperlenmiş Küresel Grafitli Dökme Demirlerde İndüksiyonla Yüzey Sertleştirmenin Yorulma Sınırı Üzerine Etkisi

Yıl 2018, Cilt: 6 Sayı: 3, 668 - 679, 30.09.2018

Erkun Oktay Volkan Kılıçlı , Mehmet Erdoğan

https://doi.org/10.29109/gujsc.401600

Cited By: 1

Öz

Bu çalışmada, östemperlenmiş küresel grafitli dökme
demirlerde indüksiyonla yüzey sertleştirmenin yorulma sınırı üzerine etkisi araştırılmıştır.
Bu amaçla, GGG70 sınıfı küresel grafitli dökme demir numuneler; 900°C’de 90 dk
östenitlenmiş ve ardından 375°C sıcaklıktaki tuz banyosunda 120 dk
östemperlenmiştir. Daha sonra dökülmüş ve östemperlenmiş koşullardaki yorulma
numunelerine yüksek frekanslı indüksiyonla yüzey sertleştirme uygulanmıştır. Dökülmüş
halde, östemperlenmiş, dökülmüş halde + indüksiyonla sertleştirilmiş ve
östemperlenmiş+indüksiyon ile sertleştirilmiş numunelerin yorulma sınırları,
dönel eğmeli yorulma testi cihazı belirlenmiştir. Deneysel sonuçlar, test
edilen numuneler arasında en iyi yorulma sınırı sonuçlarını östemperlenmiş+yüzeyi
indüksiyonla sertleştirilmiş numunelerin sergilediğini göstermiştir. 

Anahtar Kelimeler

Küresel grafitli dökme demir, Östemperlenmiş küresel grafitli dökme demir (ÖKGDD), İndüksiyonla yüzey sertleştirme

Kaynakça

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