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Journals / Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi / 2016 / Cilt: 16 - Sayı: 1

Effect of Different Heat Treatments on Mechanical Properties of Ductile Iron

Küresel Grafitli Dökme Demirlere Uygulanan Farklı Isıl İşlemlerin Mekanik Özelliklerine Etkisi

Yusuf KAYALI
Pages
192–197
Publication Date
2022-10-12
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The wear tests showed that the friction coefficient and wear rate of borotempered samples were superior compared to borided and austempered samples.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study; three different heat treatments were carried out for unalloyed nodular cast iron.
📊
Key Findings & Data:The standard samples with size of Ø 25x7 mm were used for wear tests.
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Conclusion & Impact:The wear tests showed that the friction coefficient and wear rate of borotempered samples were superior compared to borided and austempered samples.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study; three different heat treatments were carried out for unalloyed nodular cast iron. These methods are austempering, pack boriding and boro-tempering. Wear and tensile tests were performed for heat treated cast irons. Characterization of microstructure was performed using optical microscopy and scanning electron microscopy. The standard samples with size of Ø 25x7 mm were used for wear tests. The mechanical properties of bortempered ductile iron specimens are higher than that of borided ductile iron specimens but less than that of austempered ductile iron specimens. However, it was observed that the surface hardness of bortempered ductile iron specimensis comparatively higher than that of austempered ductile iron specimens. The wear tests showed that the friction coefficient and wear rate of borotempered samples were superior compared to borided and austempered samples.

Özet

Bu çalışmada; alaşımsız küresel grafitli dökme demire üç farklı ısıl işlem uygulanmıştır. Bunlar Östemperleme, Borlama ve Bortemperleme işlemidir. Isıl işlem görmüş olan numuneler çekme ve aşınma testine tabii tutulmuştur. Mikro yapısal karakterizasyonu optik ve SEM mikroskop yardımıyla gerçekleştirilmiştir. Aşınma deneyleri için ise çapı 25 x 7 olan standart numuneler kullanılmıştır.Bortemperlenen Küresel Grafitli Dökme Demir (BDI) numunelerin mekanik özellikleri, sadece Borlanmış Küresel Grafitli Dökme Demir (BDI) numunelerinden çok daha iyi olduğu fakat Östemperlenen Küresel Grafitli Dökme Demir (ADI) numunelerden daha az olduğu tespit edilmiştir. Buna karşın Östemperlenen Küresel Grafitli Dökme Demir (ADI) numunelerin yüzey sertliklerine göre Bortemperlenen Küresel Grafitli Dökme Demir (BDI) numunelerin yüzey sertliklerinin çok daha yüksek olduğu görülmüştür. Bortemperleme ısıl işleminin sürtünme katsayısı ve aşınma hızının da hem östemperleme ısıl işlemine ve borlama işlemine göre çok daha iyi olduğu tespit edilmiştir.

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Cite This Article

KAYALI, Y. (2022). Effect of Different Heat Treatments on Mechanical Properties of Ductile Iron. Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Cilt: 16 - Sayı: 1, 192–197. https://ajindex.com/articles/430201

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