Demir çelik hadde merdanelerinde 210Cr13Ni7MoW çeliğin kullanılabilirliğinin araştırılması
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Dosyalar
Tarih
2018
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Namık Kemal Üniversitesi
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Bu çalışmada, GX200Cr13Ni7MoW malzemesi döküm yoluyla üretilmiştir. Malzeme dört farklı sıcaklık ve altı farklı soğutma şiddetine maruz bırakılarak ısıl işleme tabi tutulmuştur. Isıl işlemin birincil ve ikincil karbür konsantrasyonu, karbür dağılımı, karbür tipi üzerindeki etkileri araştırılmıştır. Aşınma deneyleri neticesinde malzemenin termal şoklara karşı davranışı ile birlikte aşınma direnci belirlenmiş ve en uygun ısıl işlem şartları belirlenmeye çalışılmıştır. Isıl işlem olarak malzemenin homojenleştirme ısıl işlemi sonrası soğutma şiddetinin artırılmasının sertliği düşürdüğü ve soğutma şiddetinin azaltılmasının ise sertliği artırdığı belirlenmiştir. Sertlik artışının sebebinin yapıda martenzitik dönüşümden kaynaklanmadığı, yapıdaki ikincil karbür konsantrasyonu ile ilgili olduğu belirlenmiştir
In this study, GX200Cr13Ni7MoW material was produced by casting. The material was subjected to heat treatment by exposure to four different temperatures and six different cooling intensities. Primary and secondary carbide concentration, carbide distribution, effects on carbide type were investigated by heat treatment. As a result of the wear tests, the wear resistance was determined together with the behavior of the material against the thermal shocks and the optimum heat treatment conditions were tried to be analyzed. It has been observed that increasing the cooling intensity after the homogenization heat treatment of the material as heat treatment reduces the hardness and decreasing the cooling intensity increases the hardness. It has been determined that the cause of the increase in hardness is related to the secondary carbide concentration in the structure, not from the martensitic transformation in the structure.
In this study, GX200Cr13Ni7MoW material was produced by casting. The material was subjected to heat treatment by exposure to four different temperatures and six different cooling intensities. Primary and secondary carbide concentration, carbide distribution, effects on carbide type were investigated by heat treatment. As a result of the wear tests, the wear resistance was determined together with the behavior of the material against the thermal shocks and the optimum heat treatment conditions were tried to be analyzed. It has been observed that increasing the cooling intensity after the homogenization heat treatment of the material as heat treatment reduces the hardness and decreasing the cooling intensity increases the hardness. It has been determined that the cause of the increase in hardness is related to the secondary carbide concentration in the structure, not from the martensitic transformation in the structure.
Açıklama
Anahtar Kelimeler
GX200Cr13Ni7MoW, Yüksek kromlu beyaz dökme demir, Isıl işlem, Abrasiv aşınma yöntemi, High chromium white cast iron, Heat treatment, Abrasive wear method
