HARDOX-500 SAC MALZEMENİN ŞEKİLLENDİRİLEBİLİRLİK DAVRANIŞI ÜZERİNDE FARKLI SICAKLIKLARIN ETKİSİ

Hakan Gökmeşe, Mustafa Özdemir
1.163 321

Öz


Gerçekleştirilen çalışmada, Hardox 500 sac malzeme oda sıcaklığında 90º V dip bükme kalıbında şekillendirildiğinde, kırılma ve çatlamalar meydana gelmiştir. Sac malzemenin şekillendirilebilirliğini arttırmak amacıyla farklı sıcaklıklarda (850ºC, 900ºC, 950ºC ve 1000ºC) normalizasyon ısıl işlemi uygulanmıştır. Normalizasyon ısıl işlemi sonrasında sac malzemeler V dip bükme kalıbı kullanılarak, direk ve ezerek bükme işlemleri uygulanmıştır. Bükme işlemleri sonrasında, sac malzemelerde makro ve mikro boyutta herhangi bir kırılma veya çatlak oluşumlarının meydana gelmediği tespit edilmiştir. Artan normalizasyon ısıl işlem sıcaklıklarında, geri esneme miktarlarının azaldığı belirlenmiştir. Ezerek bükme işlemlerinde ise, geri esneme değerlerinin azaldığı tespit edilmiştir.


Anahtar kelimeler


Geri esneme, V dip bükme, normalizasyon ısıl işlemi

Tam metin:

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Referanslar


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