Nokta Direnç Kaynak Yöntemi ile Alüminyum ve Titanyum Alaşımı Sacların IF Çelik Saclarla Kaynak Kabiliyetinin Araştırılması

Bu çalışmada, 1 mm kalınlığındaki yüksek mukavemetli ve derin çekilebilir IF 180 çeliğinin yine 1 mm kalınlığındaki ticari saf titanyum (ASTM Grade 2) ve 5754 alüminyum alaşımı ile noktasal kaynak edilebilirliği araştırılmıştır. Kaynak işlemleri elektrik direnç nokta kaynağı yöntemiyle farklı kaynak akımları (10 kA, 12,5 kA ve 15 kA), kaynak süreleri (10, 15 ve 20 çevrim) ve elektrod kuvvetlerinde (5 kN, 10 kN ve 15 kN) gerçekleştirilmiştir. Kaynaklı numunelerin kaynak çekirdek çapı, elektrod dalma derinliği, sertlik ve çekme-makaslama testi sonuçları incelenerek mekanik özellikleri irdelenmiştir. Sonuç olarak, kaynak parametrelerinin IF 180 - 5754 Al alaşımı kaynak çiftinin mekanik özellikleri üzerinde IF 180 – Ti-Gr2 alaşım çiftine göre daha büyük etkiye sahip olduğu görülmüştür. Kaynak akımı ve elektrod kuvvetinin her iki kaynak çiftinde çekirdek çapı, elektrod dalma derinliği ve maksimum çekme kuvvetini önemli oranda etkilediği tespit edilmiştir.

Anahtar Kelimeler:

IF180, Titanyum Gr2, 5754 Al alaşımı, nokta direnç kaynağı, mekanik özellikler

Investigation of the Welding Capability of Aluminum and Titanium Alloy Sheets with IF Steel Sheets by Resistance Spot Welding Method

In this study, spot weldability of 1 mm thick IF 180 deep drawn high strength steel with 1 mm thick commercial pure titanium (ASTM Grade 2) and 5754 aluminum alloy was investigated. The welding operations were performed with different welding currents (10 kA, 12.5 kA and 15 kA), welding times (10, 15 and 20 cycles) and electrode forces (5 kN, 10 kN and 15 kN) by electrical resistance spot welding. The welding nugget diameter, electrode immersion depth, hardness and tensile-shear test results of the welded samples were examined and the mechanical properties were compared. As a result of the tests, it was seen that the welding parameters had a greater effect on the mechanical properties of the IF 180 -5754 Al alloy welding pair than the IF 180 - Ti-Gr2 alloy pair. It has been determined that the welding current and electrode force significantly affect the nugget diameter, electrode immersion depth and the maximum tensile force in both welding pairs.

Keywords:

IF180, Titanium Gr2, 5754 Al alloy, resistance spot welding, mechanical properties,

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