İmalat Çeliğinin Açısal Sert Dolgu Prosesinde Artık Gerilmelerin İncelenmesi

Öz

Bu çalışmada, düz plakalardaki sert dolgu prosesinin açısal kaynak dikişleri sonucunda oluşan kalıcı gerilme ve deformasyonlar incelenmiştir. Sonlu elemanlar yöntemiyle yapılan çalışmada sıcaklık dağılımları, gerilme dağılımları ve kalıcı deformasyonlar hesaplanmıştır. Doğrulama maksadıyla literatürdeki deneyler kullanılmıştır. Deneysel ve model sonuçları arasında çok yüksek bir uyum elde edilmiştir. Daha önceki çalışmalarda sadece boyuna ve enine kaynak dikişleri incelendiğinden, açısal kaynak dikişlerinin gerilme ve deformasyonlara nasıl etki edeceği bu çalışmada ortaya konmuştur. Ayrıca kaynak prosesi sonrasında soğuma zamanı dikkate alınarak gerilmelerdeki değişiklikler de hesaplanmıştır. Bulgular arasında; uzun kaynak dikişlerinin daha yüksek sıcaklıklara, deformasyonlara ve gerilmelere neden olduğu görülmüştür. Ayrıca soğuma sonrasında gerilmelerin hem çekme hem de basma anlamında daha da arttığı görülmektedir.

Anahtar Kelimeler

• Sonlu elemenlar yöntemi
• Sert dolgu
• Kaynak
• Sonlu elemenlar yöntemi, Sert dolgu, Kaynak

Investigating the Residual Stresses During Angular Hard Facing of Mild Steel

Abstract

In this study, permanent stress and deformations resulting from angular weld seams of the hardfacing process in flat plates were investigated. Temperature distributions, stress distributions, and permanent deformations were calculated in the study carried out with the finite element method. Experiments in the literature were used for validation. A very high agreement was obtained between the experimental and model results. Since only longitudinal and transverse welds were examined in previous studies, how angular welds will affect stress and deformations has been demonstrated in this study. In addition, the changes in stresses were calculated considering the cooling time after the welding process. Among the findings, it has been observed that long weld seams cause higher temperatures, deformations, and stresses. In addition, after cooling, it is seen that the stresses increase even more in terms of both tension and compression.

Keywords

• FEM
• Hardfacing
• Welding.

Kaynakça

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