The Welding of TRIP Steel with Different Si Contents by Mig-Mag Welding Technique and Its Microstructure Investigation

Öz

In this study, TRIP (Transformation Induced Plasticity) steel production with different Si content carried out by adding Si in TRIP steel with using non-vacuum induction furnace. Typical TRIP steel contains 0.2 wt % C, 1.7 Mn 1.5 Si. Al content of the steel was changed to 0,6 – 1,15 - 1,7 ratios. After then, the rolled specimens were joined by robotic Gas-Metal Arc Welding (GMAW) technique.  Hence, the weldability of the different Si content into the TRIP was investigated. For this purpose, the microstructures of the weld region were investigated and hardness profile achieved by being done micro-hardness analysis of the samples taken from the weld cross section. 

Anahtar Kelimeler

• TRIP Steel,Welding,Microstructure

Farklı Oranlarda Si İçeren TRIP Çeliğinin Mig-Mag Kaynak Tekniği İle Kaynağı ve Mikroyapısının İncelenmesi

Öz

Bu çalışmada, tipik TRIP (Transformation Induced Plasticity) çeliğinin mevcut silisyum miktarı değiştirilerek vakumsuz indüksiyon ocağında farklı Si içeriğine sahip TRIP çeliği üretimi gerçekleştirilmiştir. Tipik TRIP çeliği % ağırlıkça 0,2 C, 1,7 Mn, 1,5 Si içermektedir. Üretimi gerçekleştirilen TRİP çeliğinin Si oranı ise 0,6 – 1,15 - 1,7 oranlarında değiştirilmiştir. Döküm ve haddeleme işlem sonrasında, MİG-MAG kaynak tekniği kullanılarak birleştirilmiştir. Böylece, farklı oranda Si içeren TRIP çeliğinin kaynak edilebilirliği araştırılmıştır. Bu amaçla, kaynak bölgesinin mikroyapısı incelenmiş ve kaynak bölgesi kesitinden mikrosertlik analizleri alınarak sertlik profili çıkarılmıştır.

Anahtar Kelimeler

• TRIP Çeliği,Kaynak,Mikroyapı

Kaynakça

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