Effect of Resistance Spot Welding Parameters on Porosity Formation of the TWIP/Martensitic Steel Joints

Yıl 2022, Cilt: 63 Sayı: 707, 415 - 428, 09.06.2022

Fatih Özen , Erdinç İlhan , Salim Aslanlar

https://doi.org/10.46399/muhendismakina.1022891

Öz

In this study, the porosity problem that occurs during the joining of TWIP and Martensitic steels, which are two important steels from the AHSS steel family, was investigated. The effects of welding current and welding duration on the formation of porosity were investigated. Macro and microscopic examination of the porosity was made and the amount of formation of the porosity as an area was graphically created in terms of welding parameters. According to the results, the amount of porosity increased as the welding time and welding current increased. The highest porosity amount was 16.2% in 30 period welding time and 12 kA welding current.

Anahtar Kelimeler

Resistance spot welding, porosity formation, TWIP steel, Martensitic steel

Elektrik Direnç Nokta Kaynak Parametrelerinin TWIP/Martenizitik Çeliklerin Kaynağında Porozite Oluşumuna Etkisi

Öz

Bu çalışmada, AHSS çelik ailesinden iki önemli çelik olan TWIP ve Martenzitik çeliklerinin birleştirilmesi esnasında oluşan porozite problemi araştırılmıştır. Kaynak akımı ve kaynak süresinin porozite oluşumuna etkisi incelenmiştir. Porozitenin makro ve mikroskopik incelenmesi yapılmış ve porozitenin alan olarak oluşum miktarı kaynak parametreleri açısından incelenerek grafiksel olarak elde edilmiştir. Elde edilen bulgulara göre, kaynak süresi ve kaynak akımı arttıkça porozite miktarı artmıştır. En yüksek porozite miktarı 16.2% olarak 30 periyot kaynak süresi ve 12 kA kaynak akımında gerçekleşmiştir.

Anahtar Kelimeler

Elektrik direnç nokta kaynağı, porozite oluşumu, TWIP çeliği, Martenzitik çelik

Kaynakça

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