Doğal Yaşlanmanın Bakır Kaplı Çelik Fren Borularının Mekanik Özellikleri Üzerindeki Etkisi

Yıl 2025, Cilt: 13 Sayı: 2, 932 - 941, 30.04.2025

Ozan Koyuncu , Burak Çelik , İrem Yağmur Simitçi , Yasin Akgül , Alper İncesu

https://doi.org/10.29130/dubited.1604223

Öz

Bakır kaplı çelik borular, özellikle otomobil fren sistemleri olmak üzere birçok ürünün hidrolik sistemlerinin temel bileşenleridir. Otomotiv endüstrisinde kullanılmak üzere üretilen bakır kaplı çelik boruların mekanik özellikleri kabul kriterleri ile belirlenmektedir. Üretimden sonra stok ve transfer sürecinde bu özelliklerini koruması beklenmektedir. Ancak metalik malzemeler uzun süre oda sıcaklığında tutulduğunda doğal yaşlanmaya uğrayabilir. Bu çalışmada, farklı çaplardaki (ø4.75, ø6, ø8 mm) bakır kaplı çelik boruların 1 yıl oda sıcaklığında bekletilerek mekanik özelliklerindeki değişimler incelenmiştir. Mekanik özellikler çekme ve kumlama deneyleri ile karakterize edilmiş ve mekanik özelliklerdeki değişimler optik mikroskop kullanılarak mikro yapısı incelenerek incelenmiştir. Sonuçlar, fren borularının çekme özelliklerinde hafif bir azalma olmasına karşın mikroyapısal olarak önemli bir değişim olmadığını göstermiştir.

Anahtar Kelimeler

Bakır kaplı çelik boru , mekanik özellikler , mikro yapı , doğal yaşlanma.

Effect of Natural Aging on Mechanical Properties of Copper Clad Steel Brake Pipes

Öz

Copper-clad steel tubes are the basic components of the hydraulic systems of many products, especially automobile brake systems. The mechanical properties of copper-clad steel tubes produced for use in the automotive industry are determined by acceptance criteria. After production, they are expected to maintain these properties during the stock and transfer process. However, metallic materials may undergo natural aging when kept at room temperature for a long time. In this study, the changes in the mechanical properties of copper-clad steel tubes of different diameters (ø4.75, ø6, ø8 mm) were investigated by keeping them at room temperature for 1 year. The mechanical properties were characterized by tensile and blasting tests, and the changes in mechanical properties were investigated by examining the microstructure using an optical microscope. Results showed that the there is no significant microstructural changes while there was a slight decrease in the tensile properties of brake pipes.

Anahtar Kelimeler

Copper-clad steel tube , mechanical properties , microstructure , natural aging.

Destekleyen Kurum

Bant Boru A.Ş. and Karabük University Iron and Steel Institute

Teşekkür

The authors would like to thank Bant Boru A.Ş. and Karabük University Iron and Steel Institute for their support of this study.

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