Elektrik direnç punta kaynağı ile üçlü birleştirilen FEP05/DP600/FEP05 çelik saclarda kaynak parametrelerinin mekanik özelliklere ve mikroyapı üzerindeki etkilerin araştırılması

Öz

Günümüz otomotiv endüstrisinde, farklı malzemelerin elektrik direnç punta kaynağı ile ikili ve üçlü birleştirmelerinde yaygın olarak kullanılmaktadır. Araba gövdelerinin a-, b- ve c sütunlarında çift fazlı (DP) 600 çelikleri ve FEP05 çelikleri sıklıkla birbirine kaynaklanır. Bu çalışmada kaynak akımı, kaynak zamanı ve elektrot kuvveti gibi elektrik direnç punta kaynağı proses parametrelerinin yük taşıma kapasitesi, uzama, çekirdek çapı ve üçlü kaynaklı sac bağlantıların (FEP05 + DP600 + FEP05) çökme miktarı üzerindeki etkisi araştırılmıştır. Kaynaklı birleştirmenin mekanik özelliklerini belirlemek için çekme testleri ve mikrosertlik ölçümleri yapılmıştır. Kaynak kalitesini analiz etmek için mikroyapısal karakterizasyon kullanılmıştır. Ayrıca üçlü kaynaklı birleştirmelerde kaynak zamanının, kaynak akımının ve elektrot kuvvetinin önemli faktörler olduğu gösterilmiştir. Sonuç olarak, Kaynak parametreleri uygun seçilerek FEP05 + DP600 + FEP05 levhalarının elektrik direnç punta kaynağı ile üçlü olarak başarılı şekilde birleştirilebileceği görülmüştür.

Anahtar Kelimeler

• Elektrik direnç nokta kaynağı
• üçlü kaynak
• kaynak parametrelerinin etkileri
• mekanik özellikler

Kaynakça

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